Korloy SCMT120404-C25 PC9030 Stainless Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SCMT120404-C25 PC9030 is a heavy-duty Square (7° Positive) Turning Insert, specifically engineered for the challenges of Stainless Steel (M-Group) machining. Featuring the advanced PC9030 PVD Grade, this insert offers a specialized TiAlN coating that provides superior resistance to built-up edge and thermal cracking. The -C25 Chipbreaker is reinforced for medium-to-roughing operations, ensuring reliable chip evacuation in "gummy" materials like 304 and 316 stainless steel.
Dominate Stainless Steel: Stainless steel is known for work-hardening and adhesive wear. The PC9030 grade is formulated with a high-toughness substrate and a smooth PVD layer that prevents material from "welding" to the cutting edge, drastically extending tool life compared to general-purpose inserts.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT120404-C25 |
| Inscribed Circle (IC) | 12.7 mm |
| Thickness / Corner Radius | 4.76 mm / 0.4 mm |
| Grade | PC9030 (PVD Specialty for Stainless) |
Core Performance Benefits:
- Anti-Adhesive PVD Coating: Specially designed to reduce friction and prevent built-up edge in ductile and "sticky" stainless steels.
- Optimized -C25 Geometry: Specifically tuned to break tough stainless steel chips, preventing "long-wire" entanglements.
- High Thermal Shock Resistance: The PC9030 substrate handles the rapid heating and cooling of wet-cutting cycles without micro-cracking.
- Structural Strength: The SCMT1204 size provides the rigidity needed for deep internal boring and external turning of large stainless components.
Recommended Cutting Parameters (Stainless Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 100 - 180 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.5 mm |
| Martensitic (420/440C) | 110 - 200 m/min | 0.12 - 0.35 mm/rev | 0.8 - 4.0 mm |
| Duplex Stainless Steel | 60 - 120 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
Compatible Tool Holders:
Ensure maximum stability with 12mm square pocket holders:
- External Holders: SSDC 2020 / 2525 Series
- Boring Bars (Internal): S25S-SSDC12 / S32T-SSDC12 Series
Machinist Tip: PC9030 vs PC5300 for Stainless
Choosing the right PVD grade for your stainless steel project:
Anti-Stick King. PC9030 is specifically designed to stop "built-up edge." If your 304 stainless is sticking to the tool and causing chip outs, this is the solution.
The Generalist. Use PC5300 if you are cutting a mix of steel and stainless. It is tougher for interrupted cuts but will wear faster than PC9030 in pure stainless production.
Pro Advice: When turning stainless steel with SCMT120404-C25 PC9030, always use plenty of high-quality coolant. This helps in cooling the cutting edge and lubricating the chip flow to prevent work hardening of the workpiece.
Packaging: 10 pieces per box.
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Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.