SUMITOMO WNMG080404N-GU AC830P (WNMG 431-GU) Carbide Turning Insert
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SUMITOMO WNMG080404N-GU AC830P (WNMG 431-GU) High-Speed CVD Carbide Steel Turning Insert
1. Product Overview
"Which indexable carbide insert grade and chipbreaker geometry provide the ultimate thermal barrier and wear resistance during high-speed, continuous turning of highly abrasive steel alloys?"
The SUMITOMO WNMG080404N-GU AC830P (internationally designated under imperial nomenclature as WNMG 431-GU) is a premium indexable turning insert engineered specifically to conquer the extreme thermal and abrasive demands of steel machining. Utilizing Sumitomo's proprietary Absotech Platinum CVD technology paired with a highly reinforced, low-resistance GU Type Chipbreaker geometry, this double-sided negative trigon insert delivers exceptional flank wear resistance, eliminates plastic deformation, and provides superior tool life during high-speed continuous cutting operations.
2. Product Key Features
- Absotech Platinum CVD Coating: Engineered with an ultra-smooth, thick multi-layered Al2O3-TiCN coating matrix using advanced crystal orientation control. This micro-structural layout significantly reduces adhesion, adhesion-induced chipping, and crater wear commonly caused by highly abrasive steels at elevated temperatures.
- Medium-Duty GU-Type Chip Breaker: Features a robust, specialized deflector wall and a negative land configuration designed to handle deep depths of cut and variable feed rates. It cleanly breaks tough, stringy chips while preventing catastrophic edge chipping under unstable setups.
- Premium High-Hardness AC830P Substrate: Built on a customized, ultra-hard carbide matrix that effectively suppresses plastic deformation and resists sudden deformation under severe cutting temperatures.
- 6 Economical Cutting Edges: The negative 80-degree trigon structural configuration balances the structural rigidity of a round insert with the profiling flexibility of a standard diamond, yielding 6 distinct indexable cutting edges for optimized operational economy.
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)
Medium Breaker
| 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 Structural Cutting Parameters
| Workpiece Material Category | Cutting Speed (vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steels (1045, S45C High-Speed Turning) | 150 - 300 m/min (490 - 980 SFM) | 0.10 - 0.35 mm/rev (0.004 - 0.014 ipr) |
| Alloy Steels (4140, SCM440 Continuous Cut) | 120 - 250 m/min (390 - 820 SFM) | 0.08 - 0.30 mm/rev (0.003 - 0.012 ipr) |
This WNMG0804 / WNMG431 sequence 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 high-hardness CVD matrix provides absolute reliability in critical industries processing difficult steel materials:
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 diameter >= 40mm).
- Machine Rigidity Support: Tailored for high-speed multi-tasking CNC centers and sturdy industrial lathes (Mazak, Mori Seiki, Okuma) executing high-load rigid tool clamping.
6. Industrial Grade Comparison Matrix
| Brand | Equivalent Grade Reference | Application Range | Coating Type |
|---|---|---|---|
| SUMITOMO | AC830P (Target) | ISO P20 - P35 / Heavy Interrupted Steel Machining | Absotech Platinum CVD Al2O3-TiCN |
| Sandvik Coromant | GC4325 / GC4425 | ISO P15 - P35 / Steel Turning | Inveio CVD Coating |
| Kennametal | KCP25B / KCP30B | ISO P25 / General Steel Machining | CVD Al2O3 Coating Matrix |
| Iscar | IC8250 / IC8350 | ISO P20 - P40 / Heavy Duty Steel Cutting | CVD Alpha Coating Layer |
7. Why Choose Us & Verified Global Performance Evaluations
Real-world machine shop metrics proving structural edge stability and wear control:
"Running high-speed continuous facing operations on alloy steel shafts was destroying our tools due to pure abrasion. The AC830P grade completely changed the game. Flank wear accumulation slowed down dramatically, yielding an increase of nearly 40% parts per edge."
"Hervorragende Leistung bei hoher Schnittgeschwindigkeit auf C45. Die Verschleißfestigkeit der Flanke ist erstklassig. GU-Geometrie bricht Späne perfekt."
"Ottima resistenza al calore nella lavorazione dell'acciaio legato. Prodotto originale al 100%, spedizione veloce."
"SCM440の高速連続加工用に導入しました。従来のCVDコーティングでは塑性変形による刃先陥没が頻発していましたが、AC830Pに変えてからは熱摩耗に非常に強く、安定しています。6コーナーフルに使い切れるためコストパフォーマンスも抜群です。"
8. Technical Machining FAQ
Q: Why should I choose the CVD-coated AC830P grade instead of the AC820P steel turning grade?
A: The AC830P is a highly versatile CVD grade tailored strictly for maximum chipping resistance and edge strength during interrupted or heavy structural steel turning (ISO P20-P35). If your application involves purely high-speed continuous light finishing, the slightly harder AC810P or AC820P grade is recommended. Choose AC830P when raw toughness and structural reliability under harsh setups are your primary goals.
Q: What is the optimal operational range for the GU chipbreaker when turning steel?
A: The GU chipbreaker features a heavily reinforced design optimized specifically for medium turning fields. It provides an excellent balance of lowered cutting forces and impact cutting edge toughness. If you are executing ultra-high-precision finishing cuts with very low depths of cut, we suggest transitioning to the GZ or UX chipbreaker sequences.
Q: Can the WNMG080404N-GU insert be run completely dry without coolant?
A: Yes. The Absotech Platinum coating creates an exceptional thermal barrier layer. When running steel continuous cutting, running completely dry is highly effective for reducing thermal shock propagation along the substrate matrix. However, if your application involves long structural parts that require dimensional holding across strict limits, a highly consistent flood coolant setup is acceptable.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Primary application falls within ISO P20 to P35 guidelines. Fully optimized for high-speed roughing and medium turning of carbon steels (1045, S45C) and alloy steels (4140, SCM440) displaying abrasive surface conditions.
Machining Troubleshooting Guide: If rapid flank wear occurs, check that your surface cutting speed (vc) does not exceed structural limits for high-alloy castings, or transition to a harder P10-grade substrate matrix. If edge chipping or unexpected catastrophic pocket cracking appears, inspect structural clamping rigidity or reduce the feed rate (f) across interrupted areas to minimize sudden mechanical impact shocks.
Authorized Reference Documentation: Sizing geometries, mechanical pocket specifications, and dimensional tolerances fully comply with international ISO 1832:2017 standards for indexable cutting inserts. Performance envelopes are cross-verified using verified technical datasets published by Sumitomo Electric Hardmetal Corp.
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Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.