Korloy CNMG120404-HM PC9030 Stainless Steel Turning Insert (10pcs)
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The Original Korloy CNMG120404-HM PC9030 (ANSI Standard: CNMG 431) is a premium PVD-coated carbide insert specifically engineered for the demanding task of turning Stainless Steel. Unlike CVD grades that can be too brittle for the gummy nature of stainless, the PC9030 features a high-toughness substrate and a specialized PVD coating that prevents built-up edge (BUE). Combined with the 0.4mm (1/64") radius and HM chipbreaker, it provides sharp cutting action to minimize work hardening and ensure exceptional surface finish on 300 and 400 series stainless steels.
Stainless Expert: PC9030 is Korloy’s top-selling grade for M-class materials, offering the perfect balance of toughness for interrupted cuts and wear resistance for continuous turning.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120404-HM |
| ANSI Code | CNMG 431 |
| Grade | PC9030 (PVD Optimized for Stainless Steel) |
| Chipbreaker | HM (Finishing to Medium Cut) |
Core Performance Benefits:
- Anti-Built-Up Edge: The smooth PVD coating reduces friction, preventing stainless steel chips from welding to the cutting edge.
- Minimize Work Hardening: Sharp edge geometry ensures clean shearing of the material, which is critical for stainless steel longevity.
- High Toughness: Exceptional resistance to thermal and mechanical shock, making it reliable for both continuous and interrupted cuts.
- Precision Radius: The 0.4mm nose radius is ideal for fine finishing and maintaining tight tolerances on complex parts.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 100 - 200 m/min | 0.08 - 0.25 mm/rev | 0.5 - 3.0 mm |
| Martensitic/Ferritic (420) | 120 - 220 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.5 mm |
Compatible Tool Holders:
Maximize rigidity when machining tough stainless steel with these D-Type or M-Type holders:
- External Turning: PCLNR/L 2020K12 / PCLNR/L 2525M12 / DCLNR/L 2525M12
- Internal Boring Bars: S25S-PCLNR12 / S32T-PCLNR12
Grade Choice: PC9030 vs. NC3225
Choosing the right tool for Stainless Steel vs. Steel:
Best for Stainless Steel. Sharp edge and PVD coating prevent adhesive wear. Also works for heat-resistant alloys.
Best for Carbon/Alloy Steel. Thick CVD coating provides superior life in high-speed steel turning but may chip in gummy stainless.
Machinist's Tip: When machining 316 stainless, use plenty of coolant to prevent the material from overheating and sticking to the PC9030 insert.
Packaging: 10 pieces per box.
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.