{"product_id":"tungaloy-wnmg080404-ss-mpj350-carbide-insert","title":"Tungaloy WNMG080404-SS MPJ350 Carbide Insert – PVD Coated for Stainless Steel Finishing","description":"\u003c!-- ============================================================\n     TUNGALOY WNMG080404-SS MPJ350 – PRODUCT DETAIL PAGE\n     Brand Color: #47479F | Mobile-First | No iframes | No fixed widths\n     ============================================================ --\u003e\n\u003cstyle\u003e\n  .tng-wrap{font-family:'Segoe UI',Arial,sans-serif;color:#1a1a2e;line-height:1.7;max-width:100%}\n  .tng-hero{background:#47479F;color:#fff;padding:32px 24px;border-radius:10px;margin-bottom:28px}\n  .tng-hero h1{font-size:clamp(1.2rem,3vw,1.8rem);font-weight:800;margin:0 0 10px;letter-spacing:.4px}\n  .tng-hero p{font-size:1rem;margin:0;opacity:.92}\n  .tng-badge{display:inline-block;background:#fff;color:#47479F;font-weight:700;font-size:.78rem;padding:3px 10px;border-radius:20px;margin-right:6px;margin-bottom:6px}\n  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p{font-size:.85rem;color:#333;margin:0}\n  .tng-faq{margin-bottom:12px;border:1px solid #dde;border-radius:8px;overflow:hidden}\n  .tng-faq-q{background:#47479F;color:#fff;padding:13px 16px;font-weight:700;font-size:.92rem}\n  .tng-faq-a{background:#f9f9ff;padding:13px 16px;font-size:.88rem;color:#333}\n  .tng-tip-box{background:#1a1a2e;color:#fff;border-radius:10px;padding:20px 24px;margin-top:28px}\n  .tng-tip-box h3{color:#a0a0ff;margin-bottom:12px}\n  .tng-tip-box ul{margin:0;padding-left:20px}\n  .tng-tip-box li{margin-bottom:6px;font-size:.88rem;opacity:.92}\n  .tng-why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}\n  .tng-why-card{background:#47479F;color:#fff;border-radius:8px;padding:14px;text-align:center}\n  .tng-why-card .icon{font-size:1.6rem;margin-bottom:6px}\n  .tng-why-card strong{display:block;font-size:.9rem;margin-bottom:3px}\n  .tng-why-card span{font-size:.8rem;opacity:.88}\n  .tng-keyword-cloud{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0}\n  .tng-kw{background:#e8e8f8;color:#47479F;font-size:.78rem;padding:3px 9px;border-radius:20px;font-weight:600}\n  .tng-alert{background:#fff3cd;border-left:4px solid #f5a623;border-radius:6px;padding:12px 16px;font-size:.88rem;color:#7a5c00;margin:14px 0}\n  @media(max-width:600px){\n    .tng-hero{padding:20px 14px}\n    .tng-code-cell{min-width:50px;padding:8px 6px}\n    .tng-code-cell .letter{font-size:1.1rem}\n    .tng-section h2{font-size:1.05rem}\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"tng-wrap\"\u003e\n\n  \u003c!-- HERO \/ H1 --\u003e\n  \u003cdiv class=\"tng-hero\"\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"tng-badge\"\u003eISO WNMG\u003c\/span\u003e\n      \u003cspan class=\"tng-badge\"\u003eMPJ350 Grade\u003c\/span\u003e\n      \u003cspan class=\"tng-badge\"\u003ePVD TiAlN+Si\u003c\/span\u003e\n      \u003cspan class=\"tng-badge\"\u003eSS Chipbreaker\u003c\/span\u003e\n      \u003cspan class=\"tng-badge\"\u003eStainless Specialist\u003c\/span\u003e\n      \u003cspan class=\"tng-badge\"\u003eTungaloy\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003ch1\u003eTungaloy WNMG080404-SS MPJ350 Carbide Turning Insert – PVD Coated Stainless Steel Finishing Specialist\u003c\/h1\u003e\n    \u003cp\u003ePurpose-engineered for precision finishing of austenitic, duplex, and martensitic stainless steel. The MPJ350 grade with SS chipbreaker delivers ultra-low cutting forces, zero built-up edge, and exceptional surface finish on the most challenging stainless steel workpieces.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- PRODUCT OVERVIEW --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eProduct Overview\u003c\/h2\u003e\n    \u003cp\u003e\u003cem\u003e\"Which carbide insert gives the best surface finish on stainless steel without built-up edge or work hardening?\"\u003c\/em\u003e\u003c\/p\u003e\n    \u003cp\u003eThe \u003cstrong\u003eTungaloy WNMG080404-SS MPJ350\u003c\/strong\u003e is a dedicated stainless steel finishing insert combining two purpose-designed technologies: the \u003cstrong\u003eMPJ350 grade\u003c\/strong\u003e and the \u003cstrong\u003eSS chipbreaker geometry\u003c\/strong\u003e. Unlike general-purpose grades that compromise between steel and stainless performance, this insert is engineered exclusively for the unique challenges of stainless steel machining — high work hardening tendency, low thermal conductivity, and strong adhesion to cutting tool surfaces.\u003c\/p\u003e\n    \u003cp\u003eThe \u003cstrong\u003eMPJ350 grade\u003c\/strong\u003e features a next-generation \u003cstrong\u003ePVD TiAlN+Si (TiAlSiN) nano-composite coating\u003c\/strong\u003e over a specially formulated fine-grain carbide substrate with optimized cobalt binder content for stainless steel. The nano-Si addition creates an amorphous Si₂N₃ phase at grain boundaries that dramatically improves oxidation resistance, reduces coating friction, and prevents the adhesion of stainless steel chips to the rake face — the primary cause of built-up edge (BUE) in stainless steel turning.\u003c\/p\u003e\n    \u003cp\u003eThe \u003cstrong\u003eSS (Stainless Steel) chipbreaker\u003c\/strong\u003e features an extremely sharp positive rake angle, polished rake face, and narrow chip groove optimized for the low-to-medium feed rates (fn 0.05–0.18 mm\/rev) typical of stainless steel finishing. This geometry minimizes cutting forces by up to 30% compared to standard geometries, reducing work hardening depth and enabling Ra ≤ 0.8 µm surface finish on 304, 316L, 2205 duplex, and 17-4PH stainless steel.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003eSearch Keywords:\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cdiv class=\"tng-keyword-cloud\"\u003e\n      \u003cspan class=\"tng-kw\"\u003eWNMG080404-SS MPJ350\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eTungaloy stainless steel insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eMPJ350 grade\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eSS chipbreaker\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003estainless steel finishing insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003e304 316 stainless turning\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eduplex stainless insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eanti-BUE carbide insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003ePVD TiAlSiN insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eWNMG 08 04 04\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003elow cutting force insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eCNC stainless lathe insert\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eISO M grade carbide\u003c\/span\u003e\n      \u003cspan class=\"tng-kw\"\u003eTungaloy MPJ series\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- MODEL CODE DECODER --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eModel Code Decoder – WNMG080404-SS MPJ350\u003c\/h2\u003e\n    \u003cp\u003eEvery character in the ISO insert designation carries precise engineering meaning:\u003c\/p\u003e\n    \u003cdiv class=\"tng-code-box\"\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eW\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eInsert Shape\u003cbr\u003e80° Trigon (W)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eN\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eClearance Angle\u003cbr\u003e0° (Negative)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eM\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eTolerance Class\u003cbr\u003e±0.05–0.13mm\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eG\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eFixing Method\u003cbr\u003eHole + Chip Groove (Double-sided)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e08\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eEdge Length\u003cbr\u003e8.0mm (IC 9.525mm)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e04\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eThickness\u003cbr\u003e4.76mm\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e04\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eCorner Radius\u003cbr\u003e0.4mm (R0.4)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eSS\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eChipbreaker\u003cbr\u003eStainless Steel Geometry\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003eM\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eGrade Series\u003cbr\u003eTungaloy MPJ Series\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003ePJ\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eCoating Type\u003cbr\u003ePVD TiAlSiN Nano\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-code-cell\"\u003e\n\u003cspan class=\"letter\"\u003e350\u003c\/span\u003e\u003cspan class=\"meaning\"\u003eGrade Number\u003cbr\u003eM-Grade Stainless Specialist\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 style=\"margin-top:18px;\"\u003eSS Chipbreaker \u0026amp; MPJ350 Grade – Stainless Steel Engineering\u003c\/h3\u003e\n    \u003cul style=\"font-size:.9rem;color:#333;padding-left:20px;\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSS chipbreaker – Sharp positive rake:\u003c\/strong\u003e Extreme positive rake angle reduces cutting forces by up to 30% vs. standard geometries — minimizes work hardening depth in austenitic stainless steel, preserving surface integrity and dimensional accuracy.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSS chipbreaker – Polished rake face:\u003c\/strong\u003e Mirror-polished rake surface prevents stainless steel adhesion and built-up edge (BUE) formation — the #1 cause of surface finish degradation and premature tool failure in stainless turning.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSS chipbreaker – Narrow chip groove:\u003c\/strong\u003e Optimized for fn 0.05–0.18 mm\/rev, producing short, curled chips that evacuate cleanly without re-cutting — critical for stainless steel where chip re-cutting causes surface scratching.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMPJ350 – TiAlSiN nano-composite coating:\u003c\/strong\u003e The nano-Si addition creates an amorphous Si₂N₃ phase at grain boundaries, reducing coating friction coefficient to \u0026lt;0.4 and preventing stainless steel adhesion at the chip-tool interface.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMPJ350 – Optimized cobalt binder:\u003c\/strong\u003e Fine-grain substrate with controlled Co content provides the ideal balance of toughness and hardness for stainless steel — resists the abrasive wear from work-hardened stainless chips without micro-chipping.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- KEY FEATURES --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eKey Features\u003c\/h2\u003e\n    \u003cdiv class=\"tng-features\"\u003e\n      \u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 PVD TiAlSiN Nano-Composite Coating\u003c\/strong\u003e\u003cspan\u003eNext-generation nano-Si coating reduces friction, prevents stainless steel adhesion, and maintains hardness at elevated temperatures — superior BUE resistance vs. standard TiAlN.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 SS Stainless-Dedicated Chipbreaker\u003c\/strong\u003e\u003cspan\u003eExtreme positive rake + polished rake face + narrow groove — minimizes cutting forces, prevents BUE, and produces Ra ≤ 0.8 µm on 304, 316L, duplex, and 17-4PH stainless.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 Anti-Work-Hardening Geometry\u003c\/strong\u003e\u003cspan\u003eLow cutting forces reduce work hardening depth in austenitic stainless steel, preserving surface integrity and enabling subsequent finishing operations without dimensional issues.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 R0.4 Corner Radius\u003c\/strong\u003e\u003cspan\u003eOptimized for precision finishing — achieves Ra ≤ 0.4 µm at optimized parameters on stainless steel, ideal for bearing seats, sealing surfaces, and precision components.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 Fine-Grain Carbide Substrate\u003c\/strong\u003e\u003cspan\u003eSpecially formulated substrate with optimized Co binder for stainless steel — resists abrasive wear from work-hardened chips while maintaining edge sharpness throughout tool life.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-feat-card\"\u003e\n\u003cstrong\u003e🔷 Double-Sided Insert (4 Edges)\u003c\/strong\u003e\u003cspan\u003eG-type double-sided insert with 4 usable cutting edges — maximizes cost efficiency and reduces tooling cost per part by up to 4x vs. single-sided inserts.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- TECHNICAL SPECIFICATIONS --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n    \u003ch3\u003eMetric \u0026amp; Imperial Dimensions\u003c\/h3\u003e\n    \u003ctable class=\"tng-table\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003eImperial\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eInsert Shape\u003c\/td\u003e\n\u003ctd\u003e80° Trigon (W)\u003c\/td\u003e\n\u003ctd\u003e80° Trigon (W)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eInscribed Circle (IC)\u003c\/td\u003e\n\u003ctd\u003e9.525 mm\u003c\/td\u003e\n\u003ctd\u003e3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCutting Edge Length (L)\u003c\/td\u003e\n\u003ctd\u003e8.0 mm\u003c\/td\u003e\n\u003ctd\u003e0.315 in\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eInsert Thickness (S)\u003c\/td\u003e\n\u003ctd\u003e4.76 mm\u003c\/td\u003e\n\u003ctd\u003e0.1875 in\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCorner Radius (rε)\u003c\/td\u003e\n\u003ctd\u003e0.4 mm\u003c\/td\u003e\n\u003ctd\u003e1\/64 in\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eClearance Angle\u003c\/td\u003e\n\u003ctd\u003e0° (Negative)\u003c\/td\u003e\n\u003ctd\u003e0° (Negative)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTolerance Class\u003c\/td\u003e\n\u003ctd\u003eM (±0.05–0.13 mm)\u003c\/td\u003e\n\u003ctd\u003eM (±0.002–0.005 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eHole Diameter\u003c\/td\u003e\n\u003ctd\u003e3.81 mm\u003c\/td\u003e\n\u003ctd\u003e0.150 in\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eMPJ350\u003c\/td\u003e\n\u003ctd\u003eMPJ350\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlSiN Nano-Composite\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlSiN Nano-Composite\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eISO Application\u003c\/td\u003e\n\u003ctd\u003eM05–M25, S05–S15\u003c\/td\u003e\n\u003ctd\u003eM05–M25, S05–S15\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eChipbreaker\u003c\/td\u003e\n\u003ctd\u003eSS (Stainless Steel Finishing)\u003c\/td\u003e\n\u003ctd\u003eSS (Stainless Steel Finishing)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eUsable Cutting Edges\u003c\/td\u003e\n\u003ctd\u003e4 edges (double-sided)\u003c\/td\u003e\n\u003ctd\u003e4 edges (double-sided)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\u003ctd\u003e10 pcs \/ box\u003c\/td\u003e\n\u003ctd\u003e10 pcs \/ box\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eRecommended Cutting Parameters – Stainless Steel\u003c\/h3\u003e\n    \u003ctable class=\"tng-table\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eWorkpiece Material\u003c\/th\u003e\n\u003cth\u003eVc (m\/min)\u003c\/th\u003e\n\u003cth\u003eVc (SFM)\u003c\/th\u003e\n\u003cth\u003efn (mm\/rev)\u003c\/th\u003e\n\u003cth\u003efn (in\/rev)\u003c\/th\u003e\n\u003cth\u003eap (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eAustenitic SS 304\/304L\u003c\/td\u003e\n\u003ctd\u003e120–220\u003c\/td\u003e\n\u003ctd\u003e394–722\u003c\/td\u003e\n\u003ctd\u003e0.05–0.15\u003c\/td\u003e\n\u003ctd\u003e0.002–0.006\u003c\/td\u003e\n\u003ctd\u003e0.2–1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eAustenitic SS 316\/316L\u003c\/td\u003e\n\u003ctd\u003e100–200\u003c\/td\u003e\n\u003ctd\u003e328–656\u003c\/td\u003e\n\u003ctd\u003e0.05–0.15\u003c\/td\u003e\n\u003ctd\u003e0.002–0.006\u003c\/td\u003e\n\u003ctd\u003e0.2–1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eDuplex SS 2205\/2507\u003c\/td\u003e\n\u003ctd\u003e80–160\u003c\/td\u003e\n\u003ctd\u003e262–525\u003c\/td\u003e\n\u003ctd\u003e0.05–0.12\u003c\/td\u003e\n\u003ctd\u003e0.002–0.005\u003c\/td\u003e\n\u003ctd\u003e0.2–0.8\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMartensitic SS 17-4PH\u003c\/td\u003e\n\u003ctd\u003e100–180\u003c\/td\u003e\n\u003ctd\u003e328–591\u003c\/td\u003e\n\u003ctd\u003e0.05–0.15\u003c\/td\u003e\n\u003ctd\u003e0.002–0.006\u003c\/td\u003e\n\u003ctd\u003e0.2–1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuper Austenitic 904L\u003c\/td\u003e\n\u003ctd\u003e60–120\u003c\/td\u003e\n\u003ctd\u003e197–394\u003c\/td\u003e\n\u003ctd\u003e0.04–0.10\u003c\/td\u003e\n\u003ctd\u003e0.002–0.004\u003c\/td\u003e\n\u003ctd\u003e0.2–0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003cp style=\"font-size:.82rem;color:#666;\"\u003e* Always use flood coolant or high-pressure coolant (HPC) for stainless steel. Never run dry — heat buildup accelerates BUE and work hardening. Start at the lower end of the speed range and increase gradually.\u003c\/p\u003e\n\n    \u003cdiv class=\"tng-alert\"\u003e⚠️ \u003cstrong\u003eStainless Steel Machining Tip:\u003c\/strong\u003e Always maintain continuous cutting — dwelling or stopping the feed while the insert is in contact with the workpiece causes rapid work hardening and will damage the cutting edge. Program a minimum feed rate of fn = 0.05 mm\/rev at all times during cutting.\u003c\/div\u003e\n\n    \u003ch3\u003eSS vs. TSF Chipbreaker Comparison for Stainless Steel\u003c\/h3\u003e\n    \u003ctable class=\"tng-table\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eTSF (General Finishing)\u003c\/th\u003e\n\u003cth\u003eSS (Stainless Specialist) ✓\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eRake Angle\u003c\/td\u003e\n\u003ctd\u003ePositive\u003c\/td\u003e\n\u003ctd\u003eExtreme Positive\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eRake Face Finish\u003c\/td\u003e\n\u003ctd\u003eStandard ground\u003c\/td\u003e\n\u003ctd\u003eMirror polished\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eBUE Resistance\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWork Hardening Prevention\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eSuperior\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCutting Force Reduction\u003c\/td\u003e\n\u003ctd\u003e~15% vs. negative\u003c\/td\u003e\n\u003ctd\u003e~30% vs. negative\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eBest Material\u003c\/td\u003e\n\u003ctd\u003eSteel, alloy steel\u003c\/td\u003e\n\u003ctd\u003eStainless steel, superalloys\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eRecommended Grade\u003c\/td\u003e\n\u003ctd\u003eT9115\u003c\/td\u003e\n\u003ctd\u003eMPJ350 ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- COMPATIBLE TOOL HOLDERS --\u003e\n  \u003cdiv class=\"tng-toolholder-box\"\u003e\n    \u003ch3\u003e🔧 Compatible Tool Holders (WNMG080404)\u003c\/h3\u003e\n    \u003cp style=\"font-size:.85rem;opacity:.85;margin-bottom:14px;\"\u003eWNMG080404-SS MPJ350 uses standard MWLNR\/L 08-pocket tool holders. For stainless steel finishing, use the most rigid setup possible to minimize vibration:\u003c\/p\u003e\n    \u003cdiv class=\"tng-toolholder-grid\"\u003e\n      \u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 1616H08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e16mm shank, 95° lead, stainless finishing\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 2020K08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e20mm shank, high-rigidity finishing\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eMWLNR\/L 2525M08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e25mm shank, maximum rigidity finishing\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eDWLNR\/L 2020K08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003e20mm shank, 93° lead, facing \u0026amp; turning\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eA16R-MWLNR08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003eBoring bar, 16mm bore, internal finishing\u003c\/div\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-th-card\"\u003e\n\u003cdiv class=\"th-model\"\u003eA20R-MWLNR08\u003c\/div\u003e\n\u003cdiv class=\"th-desc\"\u003eBoring bar, 20mm bore, internal finishing\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cp style=\"font-size:.8rem;opacity:.75;margin-top:12px;\"\u003eFor stainless steel: use the shortest possible tool overhang, tightest clamping, and highest-rigidity setup to minimize vibration and chatter.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- APPLICATIONS --\u003e\n  \u003cdiv class=\"tng-section\" style=\"margin-top:28px;\"\u003e\n    \u003ch2\u003eApplications\u003c\/h2\u003e\n    \u003cdiv class=\"tng-app-grid\"\u003e\n      \u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eAustenitic SS Precision Finishing\u003c\/strong\u003e\u003cspan\u003eFinishing of 304, 304L, 316, 316L stainless steel shafts, pins, and precision components to Ra ≤ 0.8 µm with minimal work hardening.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eDuplex Stainless Steel\u003c\/strong\u003e\u003cspan\u003eFinishing of 2205 and 2507 duplex stainless steel components in oil \u0026amp; gas, chemical processing, and marine applications.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eMedical \u0026amp; Pharmaceutical\u003c\/strong\u003e\u003cspan\u003ePrecision finishing of surgical instruments, implant components, and pharmaceutical equipment in 316L and 17-4PH stainless steel.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eFood \u0026amp; Beverage Equipment\u003c\/strong\u003e\u003cspan\u003eFinishing of food-grade 304 and 316L stainless steel pump shafts, valve bodies, and processing equipment requiring smooth, hygienic surfaces.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eChemical \u0026amp; Petrochemical\u003c\/strong\u003e\u003cspan\u003eFinishing of corrosion-resistant components in 316L, 904L, and duplex stainless steel for aggressive chemical environments.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-app-card\"\u003e\n\u003cstrong\u003eAerospace Structural Parts\u003c\/strong\u003e\u003cspan\u003ePrecision finishing of 17-4PH and 15-5PH precipitation-hardened stainless steel aerospace components requiring tight tolerances and fine surface finish.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- TUNGALOY GRADE COMPARISON --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eTungaloy Grade Comparison – Stainless Steel Turning\u003c\/h2\u003e\n    \u003ctable class=\"tng-grade-table\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eCoating\u003c\/th\u003e\n\u003cth\u003eISO Range\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003cth\u003eBUE Resistance\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr class=\"highlight\"\u003e\n\u003ctd\u003eMPJ350 ✓\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlSiN\u003c\/td\u003e\n\u003ctd\u003eM05–M25\u003c\/td\u003e\n\u003ctd\u003eStainless finishing, anti-BUE specialist\u003c\/td\u003e\n\u003ctd\u003e★★★★★\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eT9115\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN\u003c\/td\u003e\n\u003ctd\u003eM10–M25\u003c\/td\u003e\n\u003ctd\u003eGeneral stainless finishing\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eT9125\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlN\u003c\/td\u003e\n\u003ctd\u003eM20–M30\u003c\/td\u003e\n\u003ctd\u003eStainless semi-finishing, interrupted\u003c\/td\u003e\n\u003ctd\u003e★★☆☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eAH725\u003c\/td\u003e\n\u003ctd\u003eCVD\u003c\/td\u003e\n\u003ctd\u003eM15–M30\u003c\/td\u003e\n\u003ctd\u003eStainless semi-finishing to roughing\u003c\/td\u003e\n\u003ctd\u003e★★☆☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMPJ300\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlSiN\u003c\/td\u003e\n\u003ctd\u003eM05–M20\u003c\/td\u003e\n\u003ctd\u003eHigh-speed stainless finishing\u003c\/td\u003e\n\u003ctd\u003e★★★★☆\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMPJ400\u003c\/td\u003e\n\u003ctd\u003ePVD TiAlSiN\u003c\/td\u003e\n\u003ctd\u003eM15–M30\u003c\/td\u003e\n\u003ctd\u003eStainless semi-finishing, tougher\u003c\/td\u003e\n\u003ctd\u003e★★★☆☆\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003cp style=\"font-size:.82rem;color:#666;\"\u003e✓ = Current product. MPJ350 is the optimal balance of BUE resistance, wear resistance, and toughness for stainless steel finishing in the Tungaloy MPJ series.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY CHOOSE US --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eWhy Choose Us\u003c\/h2\u003e\n    \u003cdiv class=\"tng-why-grid\"\u003e\n      \u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e🏭\u003c\/div\u003e\n\u003cstrong\u003eAuthorized Distributor\u003c\/strong\u003e\u003cspan\u003e100% genuine Tungaloy products with full manufacturer quality assurance.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e🚀\u003c\/div\u003e\n\u003cstrong\u003eFast Global Shipping\u003c\/strong\u003e\u003cspan\u003eWorldwide dispatch with full tracking and reliable delivery timelines.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e🔬\u003c\/div\u003e\n\u003cstrong\u003eTechnical Expertise\u003c\/strong\u003e\u003cspan\u003eExpert stainless steel machining support to optimize your cutting parameters and tool selection.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e📦\u003c\/div\u003e\n\u003cstrong\u003eBulk Pricing\u003c\/strong\u003e\u003cspan\u003eCompetitive volume discounts for production quantities. Contact us for a quote.\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"tng-why-card\"\u003e\n\u003cdiv class=\"icon\"\u003e✅\u003c\/div\u003e\n\u003cstrong\u003eGuaranteed Genuine\u003c\/strong\u003e\u003cspan\u003eEvery insert sourced directly from Tungaloy — zero counterfeits, zero compromises.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- CUSTOMER REVIEWS --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eCustomer Reviews\u003c\/h2\u003e\n    \u003cdiv class=\"tng-review-grid\"\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003eEric L.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇺🇸 United States\u003c\/div\u003e\n        \u003cp\u003e\"Using WNMG080404-SS MPJ350 for finishing 316L stainless steel medical components. Zero BUE issues — surface finish is consistently Ra 0.6 across the whole batch. This insert solved the BUE problem that was ruining our surface finish with other grades.\"\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003eFranz H.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇩🇪 Germany\u003c\/div\u003e\n        \u003cp\u003e\"Perfekt für die Feinbearbeitung von 1.4404 (316L) Edelstahl. Die SS-Geometrie verhindert Aufbauschneidenbildung vollständig. Oberflächenqualität Ra 0.8 problemlos erreichbar. MPJ350 ist unser Standardwerkzeug für Edelstahlfinishing.\"\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003eStefano B.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇮🇹 Italy\u003c\/div\u003e\n        \u003cp\u003e\"Utilizzo MPJ350 per la finitura di componenti in acciaio inox 2205 duplex per applicazioni oil \u0026amp; gas. La geometria SS elimina il tagliente di riporto e la qualità superficiale è eccellente. Vita utensile molto consistente anche su duplex.\"\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003eYuki T.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇯🇵 Japan\u003c\/div\u003e\n        \u003cp\u003e\"SUS316Lの精密仕上げ加工にMPJ350を使用。構築刃が全く発生せず、Ra0.6を安定して実現。他もの版に比べ切削抗力が明らかに低く、薄肉部品の加工に最適です。\"\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★☆\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003eJames C.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇬🇧 United Kingdom\u003c\/div\u003e\n        \u003cp\u003e\"Good performance on 17-4PH stainless steel aerospace components. The SS chipbreaker handles the low feeds well and BUE is completely eliminated. Slightly prefer higher coolant pressure for best results, but overall an excellent stainless finishing insert.\"\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003eWang M.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇨🇳 China\u003c\/div\u003e\n        \u003cp\u003e\"用于316L不锈钉医疗器械件精加工，SS槽型切削力小，完全没有积屑刀尖问题。Ra0.6轻松达到，工具寿命稳定。MPJ350是我们不锈钉精加工的首选。\"\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"tng-review-card\"\u003e\n        \u003cdiv class=\"stars\"\u003e★★★★★\u003c\/div\u003e\n        \u003cdiv class=\"reviewer\"\u003ePedro M.\u003c\/div\u003e\n        \u003cdiv class=\"country\"\u003e🇧🇷 Brazil\u003c\/div\u003e\n        \u003cp\u003e\"Excelente inserto para acabamento de aço inoxidável 304 em equipamentos para indústria alimentar. A geometria SS elimina completamente o gume postico e a qualidade superficial é consistente em toda a produção.\"\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FAQ --\u003e\n  \u003cdiv class=\"tng-section\"\u003e\n    \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n    \u003cdiv class=\"tng-faq\"\u003e\n      \u003cdiv class=\"tng-faq-q\"\u003eQ1: What makes MPJ350 different from T9115 for stainless steel turning?\u003c\/div\u003e\n      \u003cdiv class=\"tng-faq-a\"\u003eMPJ350 is a \u003cstrong\u003estainless steel specialist grade\u003c\/strong\u003e with a PVD TiAlSiN nano-composite coating that has a lower friction coefficient and superior anti-adhesion properties compared to T9115’s standard TiAlN coating. The nano-Si addition in MPJ350 creates an amorphous phase that prevents stainless steel from adhering to the rake face — the root cause of BUE. T9115 is excellent for steel and general stainless; MPJ350 is the dedicated choice when BUE, work hardening, and surface finish on stainless steel are the primary concerns.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"tng-faq\"\u003e\n      \u003cdiv class=\"tng-faq-q\"\u003eQ2: Can I use WNMG080404-SS MPJ350 for duplex stainless steel?\u003c\/div\u003e\n      \u003cdiv class=\"tng-faq-a\"\u003eYes — MPJ350 covers \u003cstrong\u003eISO M05–M25\u003c\/strong\u003e and is suitable for duplex stainless steel (2205, 2507) at reduced cutting speeds (Vc 80–160 m\/min). Duplex stainless is significantly harder and more abrasive than austenitic grades, so reduce speed by 20–30% compared to 304\/316 parameters. Use high-pressure coolant (HPC) and ensure continuous cutting — dwelling causes rapid work hardening in duplex stainless. For super duplex (2507) or super austenitic (904L), consider Tungaloy’s dedicated superalloy grades.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"tng-faq\"\u003e\n      \u003cdiv class=\"tng-faq-q\"\u003eQ3: Why is coolant so important when machining stainless steel?\u003c\/div\u003e\n      \u003cdiv class=\"tng-faq-a\"\u003eStainless steel has \u003cstrong\u003elow thermal conductivity\u003c\/strong\u003e (about 1\/3 of carbon steel), meaning heat generated during cutting cannot dissipate through the workpiece — it concentrates at the cutting edge. Without coolant, this heat causes: (1) rapid BUE formation as stainless steel softens and adheres to the rake face; (2) accelerated coating degradation; (3) increased work hardening depth. Always use \u003cstrong\u003eflood coolant at minimum 20 bar\u003c\/strong\u003e, or high-pressure coolant (HPC at 70+ bar) for best results with MPJ350.\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"tng-faq\"\u003e\n      \u003cdiv class=\"tng-faq-q\"\u003eQ4: What tool holder do I need for WNMG080404-SS MPJ350?\u003c\/div\u003e\n      \u003cdiv class=\"tng-faq-a\"\u003eYou need an \u003cstrong\u003eMWLNR\/L series holder with 08 pocket designation\u003c\/strong\u003e (e.g., MWLNR2020K08 for 20mm shank). For stainless steel finishing, use the \u003cstrong\u003eshortest possible overhang\u003c\/strong\u003e and the \u003cstrong\u003elargest shank size\u003c\/strong\u003e your machine accepts to minimize vibration — even small vibrations cause chatter marks on stainless steel surfaces. For internal turning, use an A-series boring bar (e.g., A20R-MWLNR08).\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"tng-faq\"\u003e\n      \u003cdiv class=\"tng-faq-q\"\u003eQ5: How do I prevent work hardening when turning stainless steel?\u003c\/div\u003e\n      \u003cdiv class=\"tng-faq-a\"\u003eTo minimize work hardening in stainless steel turning: (1) \u003cstrong\u003eNever dwell\u003c\/strong\u003e — maintain continuous feed at all times (minimum fn = 0.05 mm\/rev); (2) \u003cstrong\u003eUse sharp inserts\u003c\/strong\u003e — replace worn inserts before they start rubbing; (3) \u003cstrong\u003eMaintain adequate depth of cut\u003c\/strong\u003e — always cut below the work-hardened layer from the previous pass (ap ≥ 0.3 mm); (4) \u003cstrong\u003eUse flood coolant\u003c\/strong\u003e to reduce heat and BUE; (5) \u003cstrong\u003eUse the SS chipbreaker\u003c\/strong\u003e with MPJ350 — the low cutting forces minimize work hardening depth compared to standard geometries.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- GRADE TIP BOX --\u003e\n  \u003cdiv class=\"tng-tip-box\"\u003e\n    \u003ch3\u003e💡 Stainless Steel Machining Tips – Tungaloy MPJ Series Grade Guide\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMPJ300 (PVD TiAlSiN):\u003c\/strong\u003e Highest speed stainless finishing. Use when Vc \u0026gt; 200 m\/min on 304\/316. Maximum wear resistance, lower toughness.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMPJ350 (PVD TiAlSiN) — This Product:\u003c\/strong\u003e Best balance for stainless finishing. Optimal BUE resistance, wear resistance, and toughness for 304, 316L, duplex, and 17-4PH.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMPJ400 (PVD TiAlSiN):\u003c\/strong\u003e More toughness than MPJ350. Use for stainless semi-finishing with light interrupted cuts or variable stock.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eT9115 (PVD TiAlN):\u003c\/strong\u003e General-purpose finishing grade. Good for stainless but inferior BUE resistance vs. MPJ350. Use when both steel and stainless are machined with the same insert.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAH725 (CVD):\u003c\/strong\u003e For stainless semi-finishing to roughing at higher feeds. CVD coating is less effective against BUE than PVD — use only when toughness is the priority.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eChipbreaker guide for stainless:\u003c\/strong\u003e SS = finishing (fn 0.05–0.18, anti-BUE priority) | TSF = general finishing (fn 0.05–0.20) | TM = semi-finishing (fn 0.15–0.35). Always use SS chipbreaker when BUE is a problem.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eGolden rule for stainless:\u003c\/strong\u003e Sharp insert + low feed + adequate depth + continuous cutting + flood coolant = success. Never compromise on any of these five factors.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Tungaloy","offers":[{"title":"Default Title","offer_id":44054199763116,"sku":"WNMG080404-SS MPJ350","price":74.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/7328\/1708\/files\/WNMG080404-SSMPJ350.jpg?v=1736500410","url":"https:\/\/cnchome-beyond.com\/products\/tungaloy-wnmg080404-ss-mpj350-carbide-insert","provider":"CNCHome-Beyond","version":"1.0","type":"link"}