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.