SUMITOMO WNMG080404N-EG AC6030M (WNMG 431-EG) Stainless Steel Carbide Turning Insert
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SUMITOMO WNMG080404N-EG AC6030M (WNMG 431-EG) Absotech Platinum CVD Carbide Stainless Steel Turning Insert
1. Product Overview
"Which indexable carbide insert grade and medium-cut chipbreaker geometry deliver the absolute best tool life, adhesion resistance, and burr control during the high-speed continuous or lightly interrupted turning of austenitic and duplex stainless steels?"
The SUMITOMO WNMG080404N-EG AC6030M (internationally designated in imperial benchmarks as WNMG 431-EG) is a premium, industrial-grade, double-sided negative 80° trigon indexable turning insert engineered explicitly for general medium-duty cutting, profiling, and light interrupted machining of stainless steel alloys (ISO M20 - M30 classification). Utilizing Sumitomo's pioneering Absotech Platinum CVD coating technology, the AC6030M grade achieves a highly smooth, ultra-dense TiCN/Al2O3 crystal orientation that provides unprecedented resistance to built-up edge (BUE), micro-chipping, and thermal cracking. Paired with the highly engineered EG Type Chipbreaker geometry, this insert drastically lowers cutting forces, controls stringy chip nesting under variable depths of cut, and ensures maximum operational stability across high-volume production lines.
2. Product Key Features
- Absotech Platinum CVD Coating: Integrates a smooth coating layer with highly controlled residual stress. This provides excellent adhesion resistance and outstanding crater wear control when machining sticky stainless materials.
- Optimized EG-Type Rake Geometry: Engineered with a specialized positive land profile and variable chip deflector walls. The EG design smoothly curtails work-hardening and deformation while ensuring precise chip curling.
- High-Toughness Carbide Substrate: Developed with an advanced grain-controlled matrix that withstands high mechanical shocks, preventing sudden insert breakage during cross-feed transitions and rough crust skin removal.
- 6 Economical Cutting Edges: The negative 80-degree structural trigon layout yields 6 distinct cutting corners per insert, delivering elite processing economy and maximizing shop floor cost savings.
3. Technical Specifications & Dimension Matrix
🔍 ISO / ANSI Nomenclature Decoding Matrix
| Dimension Parameter | Metric Specification (ISO) | Imperial Specification (ANSI) |
|---|---|---|
| Inscribed Circle (IC) | 9.525 mm | 0.375 in (3/8") |
| Thickness (S) | 4.76 mm | 0.187 in (3/16") |
| Corner Nose Radius (re) | 0.4 mm | 0.0156 in (1/64") |
| Fixing Hole Diameter (d1) | 3.81 mm | 0.150 in |
📊 Recommended Technical Cutting Parameters
| Workpiece Material Category | Cutting Speed (vc) | Feed Rate (f) |
|---|---|---|
| Austenitic Stainless Steel (SUS304 / SUS316) | 140 - 240 m/min (460 - 785 SFM) | 0.12 - 0.30 mm/rev (0.005 - 0.012 ipr) |
| Duplex Stainless Steel (SUS329J4L / 2205) | 90 - 160 m/min (295 - 525 SFM) | 0.10 - 0.25 mm/rev (0.004 - 0.010 ipr) |
This WNMG0804 / WNMG431 indexable matrix requires standard external or internal negative turning toolholders with a 95° approach angle.
Browse Matching MWLNR/L & WWLNR/L Toolholders →4. Product Application Scenarios
The AC6030M grade offers superior tool security across high-precision industrial components:
5. Toolholder & Equipment Compatibility
Strictly compliant with indexable geometric standard pocket seating, this insert integrates natively into global standard hardware:
- External Shank Holders: MWLNR2020K08, MWLNR2525M08, WWLNR2525M08 (Metric) / MWLNR16-4B, WWLNR16-4B (Imperial).
- Boring Bars (Internal): A32S-MWLNR08, A40T-MWLNR08 (Minimum bore clearance diameter >= 40mm).
- Lathe Integration: Optimized for high-rigidity CNC turning centers (Mazak, DMG Mori, Okuma, Haas) utilizing high-volume flood coolant delivery to maximize chip clearing and heat dissipation.
6. Industrial Grade Comparison Matrix
| Brand | Equivalent Grade Reference | Application Range | Coating Properties |
|---|---|---|---|
| SUMITOMO | AC6030M (Target) | ISO M20 - M30 / Medium-Cut & General Stainless Steel Turning | Absotech Platinum CVD Al2O3 - TiCN Crystal Matrix |
| Sandvik Coromant | GC2220 / GC2025 | ISO M20 - M25 / Stainless General Cut | Inveio CVD multi-layer alumina coating |
| Kennametal | KCM25B / KC9225 | ISO M20 - M30 / Medium Stainless Machining | Advanced multi-layered CVD system |
| Iscar | IC6015 / IC6025 | ISO M15 - M25 / General Stainless Alloy Turning | CVD coated wear-resistant grade |
7. Why Choose Us & Verified Global Performance Evaluations
Real-world machine shop metrics proving structural edge stability and wear control under heavy impact:
"We rough-turn 316L stainless forgings all day. Built-up edge used to destroy our insert corners within 5 parts. Since switching to the AC6030M with the EG breaker, we are getting a clean 25 parts per corner with uniform wear bands. The smooth coating really keeps the sticky chips from welding."
"Hervorragende Leistung bei Duplex-Edelstahl 2205. Die Absotech Platinum-Beschichtung schützt die Schneidkante perfekt vor Kolkverschleiß und Mikroausbrüchen. Der Spanbruch ist dank der EG-Geometrie extrem stabil."
"Ottimo inserto per la lavorazione dell'acciaio inossidabile austenitico. Riduce drasticamente la formazione del tagliente di riporto, mantenendo un'ottima finitura superficiale."
"SUS304の加工で抜群の安定性。Absotechの平滑な皮膜のおかげで溶着が起きにくく、寸法精度が長寿命で維持されます。EGブレーカの切りくず処理も申し分ないです。"
8. Technical Machining FAQ
Q: What makes the AC6030M grade uniquely suited for stainless steel turning?
A: Stainless steels are notorious for low thermal conductivity and high ductility, leading to work hardening and built-up edge (BUE). The AC6030M utilizes Sumitomo's Absotech Platinum CVD coating process, which flattens the outer layer crystals to prevent chip adhesion while serving as an exceptional thermal barrier for the core.
Q: When should I choose the EG chipbreaker over roughing chipbreakers like EM?
A: The EG chipbreaker is explicitly optimized for general-purpose medium-duty machining. It features a sharp yet stable edge land that strikes an ideal balance between low cutting force and edge durability, making it the perfect choice for medium profiling where cut depths fluctuate.
Q: Should I run this insert dry or wet?
A: Wet machining with generous flood coolant is strongly recommended. High-volume coolant reduces cutting temperatures and lubricates the tool-chip interface to prevent chip welding, extending tool life on austenitic and duplex stainless steels.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Primary application domain covers ISO M20 to M30 parameters. Explicitly optimized for continuous-to-heavily interrupted cutting of austenitic stainless steel (304, 316, 316L), ferritic/martensitic stainless steel (410, 430), and high-strength duplex stainless steels (2205, 2507).
Machining Troubleshooting Guide: If micro-chipping or thermal cracking occurs, ensure adequate coolant pressure or switch to a tougher grade like AC6040M. If aggressive crater wear or built-up edge occurs, increase the cutting speed (vc) within the recommended parameters to boost shedding efficiency.
Authorized Reference Documentation & Endorsements: Dimensional configurations, pocket seating tolerances, and naming structures fully comply with the international ISO 1832:2017 industrial standards blueprint. Mechanical strength thresholds, thermal crack criteria, and wear tolerances are cross-referenced from verified test catalogs published by Sumitomo Electric Hardmetal Corp.
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This Sumitomo insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.