SUMITOMO WNMG080404N-GE AC830P (WNMG 431-GE) Carbide Steel Turning Insert
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SUMITOMO WNMG080404N-GE AC830P (WNMG 431-GE) CVD Carbide Interrupted Heavy Steel Turning Insert
1. Product Overview
"Which indexable carbide insert grade and roughing chipbreaker configuration are best suited to withstand severe thermal cracking, resist edge chipping, and ensure maximum metal removal rates during heavily interrupted rough turning of carbon and alloy steels?"
The SUMITOMO WNMG080404N-GE AC830P (internationally designated in imperial size as WNMG 431-GE) is an industrial-grade, double-sided negative 80° trigon indexable turning insert engineered for heavy roughing to severely interrupted cutting of carbon steels, alloy steels, and structural steel variants (ISO P30 - P35 classification). Utilizing Sumitomo's breakthrough Absotech Platinum CVD coating technology, the AC830P grade features an engineered residual stress control matrix that provides extraordinary resistance to impact chipping and thermal cracking under high-feed dry or wet machining. Paired with the highly stable, heavy-duty GE Type Chipbreaker geometry, this insert manages high forces, eliminates bird-nesting chips, and delivers highly predictable tool life during aggressive metal removal operations.
2. Product Key Features
- Absotech Platinum CVD Coating: Features a smooth, highly crystalline alpha-alumina (Al2O3) and TiCN coating matrix. This advanced architectural engineering layer dramatically minimizes crater wear and acts as an elite thermal barrier during high-speed, high-temperature structural steel roughing.
- Heavy-Duty GE-Type Rake Geometry: Specifically engineered with a strong, reinforced land and a wide chip deflector basin. The GE profile reduces edge chipping during high-impact interrupted cuts while maintaining optimal chip breakability at high feed rates.
- Ultra-Tough Gradient Substrate: The AC830P structural core incorporates an optimized tungsten carbide-cobalt matrix designed to absorb heavy mechanical shock, making it the industry standard for machining out-of-round forgings or welded structures.
- 6 Indexable Cutting Corners: The negative 80-degree structural trigon layout provides 6 distinct cutting edges per insert, delivering elite processing economy and maximizing shop floors' return on investment (ROI).
3. Technical Specifications & Dimension Matrix
🔍 ISO / ANSI Nomenclature Decoding Matrix
Trigon Shape (80°)
0° Relief Angle
M-Class Tolerance
With Hole & Slots
Edge Length (9.525mm)
Thickness (4.76mm)
Nose Radius (0.4mm)
Heavy Roughing
| 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) |
|---|---|---|
| Carbon / Alloy Steels (AISI 1045 / 4140 Roughing) | 120 - 280 m/min (390 - 920 SFM) | 0.25 - 0.50 mm/rev (0.010 - 0.020 ipr) |
| Interrupted Mold / Die Steel Foundations | 90 - 200 m/min (295 - 655 SFM) | 0.20 - 0.45 mm/rev (0.008 - 0.018 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 AC830P structural steel grade provides maximum operational security across demanding machining environments:
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: Engineered for high-power CNC turning centers and heavy-duty manual lathes (Mazak, Okuma, Haas, Doosan) requiring premium mechanical pocket clamping force.
6. Industrial Grade Comparison Matrix
| Brand | Equivalent Grade Reference | Application Range | Coating Properties |
|---|---|---|---|
| SUMITOMO | AC830P (Target) | ISO P30 - P40 / Maximum Toughness Interrupted Steel Roughing | Absotech Platinum Smooth CVD Al2O3-TiCN Layer |
| Sandvik Coromant | GC4435 / GC4335 | ISO P35 / Heavy Interrupted Steel Cut | Inveio Textured CVD Coating Technology |
| Kennametal | KCP30B | ISO P30 / Shock-Resistant Alloy Turning | KMT multilayer CVD coating matrix |
| Iscar | IC830 / IC8350 | ISO P30 - P45 / High-Shock Steel Application | MTCVD and tough substrate compilation |
7. Why Choose Us & Verified Global Performance Evaluations
Real-world machine shop metrics proving structural edge stability and wear control under heavy impact:
"We turn heavy 4140 forged parts with multiple keyways. Other inserts chipped out within three passes. The Sumitomo AC830P with the GE breaker takes the pounding easily. Metal removal rate increased significantly."
"Extrem zähe Wendeschneidplatte. Perfekt für raue Oberflächen und stark unterbrochene Schnitte bei zähem Baustahl. Absolut empfehlenswert für Lohnfertiger."
"Eccellente resistenza allo shock termico nella sgrossatura a secco. Rompitruciolo GE molto robusto."
"鍛造鋼の強断続加工で圧倒的な強さを見せてくれます。コーティングの剥離やチッピングが大幅に減少し、夜間無人運転でも安心して使用できます。"
8. Technical Machining FAQ
Q: Why should I choose the AC830P CVD grade over a PVD coated grade for heavy steel roughing?
A: Heavy carbon steel roughing generates immense structural friction and heat. The AC830P's thick, specialized Absotech Platinum CVD alumina coating provides much higher thermal insulation and crater-wear resistance than thin PVD options. This protects the heavy-duty edge matrix during prolonged, high-depth-of-cut processing.
Q: Is it better to run the WNMG080404N-GE insert wet or dry in interrupted cutting?
A: For heavily interrupted cuts, running dry or utilizing ultra-high-pressure targeted cooling is best. Standard flood coolant often causes severe thermal shock cycles (rapid heating and cooling), leading to micro-cracking. The AC830P grade is specifically optimized to manage these heavy thermal fluctuations safely.
Q: Can the GE chipbreaker handle light finishing profiles?
A: The GE configuration is built with a wide land profile specifically for medium-to-heavy roughing. For light finishing cuts (depth of cut less than 1.0mm), a lighter deflector geometry like Sumitomo's GU or GU Type should be selected to avoid deflection and chip packing issues.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Primary application domain covers ISO P30 to P40 parameters. Engineered for continuous-to-heavily interrupted cutting of carbon steels (AISI 1045/1060), alloy steels (AISI 4140/4340), tool steels, and structural steel forgings.
Machining Troubleshooting Guide: If plastic deformation of the edge occurs, reduce cutting speed (vc) or choose a harder grade (e.g., AC820P). If rapid mechanical chipping occurs at the nose radius, verify pocket alignment, reduce the feed rate (f), or increase the tool nose radius to 0.8mm (WNMG080408N-GE).
Authorized Reference Documentation: Physical dimensional standards and mounting tolerances strictly follow the regulatory ISO 1832:2017 blueprint. Performance data, structural wear parameters, and substrate configurations are cross-referenced from verified technical catalogs published by Sumitomo Electric Hardmetal Corp.
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.