Tungaloy WNMG080408-SM AH725 Carbide Turning Insert for Stainless Steel
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WNMG080408-SM AH725 Turning Insert
High-Performance PVD Solution for Stainless Steel & HRSA
Product Overview
"Which insert grade is most reliable for medium-duty turning of gummy stainless steel and heat-resistant alloys while preventing notch wear?"
The Tungaloy WNMG080408-SM AH725 is engineered to conquer the thermal challenges of difficult-to-cut materials. Utilizing the AH725 PVD grade (AlTiN coated), it provides an ideal balance of toughness and oxidation resistance. The SM chipbreaker (Medium-cut) features a specifically honed cutting edge that reduces cutting forces and effectively breaks chips in long-chipping materials like 304 and 316 stainless steel.
Core Performance Advantages
- Premium AH725 Grade: PVD (Physical Vapor Deposition) coating ensures a sharp cutting edge and resists built-up edge (BUE).
- Enhanced 0.8mm Nose Radius: Provides higher edge strength for medium cutting compared to finishing-oriented radii.
- SM Geometry: A stable chipbreaker designed for medium cutting range, effectively managing chip evacuation in ductile metals.
- Trigon Economy: Six usable cutting edges per insert, reducing tool costs significantly over four-edge designs.
Technical Specifications
| Parameter | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Code | WNMG080408-SM | WNMG432-SM |
| Cutting Speed (Vc) | 50 - 150 m/min | 165 - 490 sfm |
| Feed Rate (fn) | 0.15 - 0.40 mm/rev | .006 - .016 ipr |
| Depth of Cut (ap) | 1.0 - 3.5 mm | .040 - .138 in |
Shop Compatible Boring Bars & Tool Holders →
Common Applications
- Austenitic Stainless Steel (304, 316L, 317).
- Heat-Resistant Superalloys (Inconel, Titanium).
- General Medium Turning & Profiling.
- Industries: Aerospace, Medical, and Oil & Gas.
Device Compatibility
Universal fit for CNC Turning Centers, Lathes, and Multi-tasking Machines from Mazak, Haas, Okuma, DMG Mori, and Fanuc systems using ISO standard holders.
Tungaloy Material Grade Matrix
| Grade | Coating Type | Best For |
|---|---|---|
| AH725 | PVD (Sharp Edge) | Stainless/Superalloys |
| T9215 | CVD (Thick Layer) | High-Speed Steel Turning |
| AH120 | PVD (Tough) | Cast Iron/Interrupted Cuts |
Global Customer Testimonials
"Outstanding life in 316 Stainless. The SM chipbreaker handles the gummy chips without breaking the tool."
— Mark R., USA"Eccellente su Inconel 718. Il grado AH725 resiste bene al calore."
— Giuseppe V., Italy"Exactly what we needed for our Okuma lathe. Clean cuts and consistent tolerances."
— Kenji H., Japan"Gute Spanabfuhr bei Edelstahl. Preis-Leistung ist unschlagbar."
— Dirk S., GermanyFrequently Asked Questions
Q: Why choose PVD AH725 over CVD grades for stainless steel?
A: PVD coatings allow for a sharper cutting edge, which is essential for "gummy" materials like stainless to prevent built-up edge and surface tearing.
Q: Is this insert suitable for finishing?
A: The SM is a medium-cut breaker. For high-precision finishing, we recommend Tungaloy's SS or SF chipbreakers with a smaller nose radius.
Q: What is the benefit of the 0.8mm radius?
A: It provides a stronger cutting edge than the 0.4mm version, allowing for higher feed rates and better durability in medium turning.
Machining Pro Tip: When turning heat-resistant alloys, ensure high-pressure coolant is directed at the tool tip to maximize the life of the AH725 coating and prevent thermal cracking.
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.