Korloy Indexable Turning & Boring Insert SCMT09T304-HMP NC3020 | SCMT 321-HMP (Imperial Equivalent) Carbide Inserts for Alloy Steel & Stainless Machining - 10pcs Box
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Korloy Indexable Turning & Boring Insert SCMT09T304-HMP NC3020 | SCMT 321-HMP (Imperial Equivalent) Carbide Inserts for Alloy Steel & Stainless Machining - 10pcs Box
High-Performance ISO-Standard Indexable Cutting Tools for Industrial CNC Alloy Steel & Continuous Turning Applications
1. Product Overview
"Which indexable turning insert provides superior wear resistance, high thermal stability, and precise dimensional control for continuous and light interrupted machining of alloy steels?" CNC programmers and manufacturing engineers frequently select the Korloy SCMT09T304-HMP NC3020. This industrial-grade indexable carbide insert features a specialized PVD multi-layer coated grade engineered to resist crater wear and abrasive breakdown, combined with a robust -HMP chipbreaker geometry and a sharp 0.4mm corner radius designed to achieve exceptional surface finishes and predictable chip evacuation during precision turning operations.
2. Product Key Features
- NC3020 Grade Technology: An advanced PVD coated carbide grade optimized for alloy steel (ISO P20-P30) and stainless steel turning, delivering high red hardness and superior flank wear resistance.
- -HMP Geometry & 0.4mm Radius: Precision-engineered positive rake design with a fine 0.4mm corner radius to achieve superior surface textures and minimize cutting forces during finishing passes.
- ISO/ANSI Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee absolute indexing repeatability and secure toolholder pocket clamping.
- High Productivity Package: Supplied in industrial factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline shop floor inventory.
3. Technical Specifications & Model Breakdown
Review the comprehensive parameter specifications, metric-to-imperial conversions, and ISO model code breakdown below for seamless integration into your CNC machining environment.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | SCMT09T304-HMP | SCMT 321-HMP |
| Inscribed Circle (I.C.) / Size | 9.525 mm (09) | 3/8 inch (3 series) |
| Insert Thickness (T3) | 3.97 mm | 11/64 inch (2 series) |
| Corner Radius (04) | 0.4 mm | 1/64 inch (1 series / 0.0156") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed per Revolution (fn) mm/rev |
|---|---|---|
| Alloy Steel & Carbon Steel (P20 - P30) | 150 - 280 | 0.12 - 0.30 |
| Austenitic Stainless Steel (M10 - M25) | 100 - 200 | 0.08 - 0.22 |
Looking to pair these inserts with compatible external turning tool holders or boring bars?
Browse Compatible S-Series Turning Tool Holders4. Product Application Scenarios
The Korloy SCMT09T304-HMP NC3020 insert performs exceptionally across demanding industrial sectors:
- Aerospace Component Machining: Precision finishing of high-strength alloy steel structural elements and brackets.
- Automotive Transmission Production: Fine turning of hardened alloy steel shafts, gear blanks, and axle components.
- Heavy Industrial Engineering: Semi-finishing and continuous profiling of forged alloy components requiring high surface integrity.
5. Compatibility
Engineered to integrate seamlessly into standard industrial tooling setups:
- Tool Holders: Fully compatible with ISO standard external turning tool holders (e.g., CSKPR, CSBCL, CSSPR series) and internal boring bars featuring 9.525mm square insert pockets.
- Machine Tools: Optimized for advanced CNC turning centers, multi-tasking lathes, and rigid conventional turning equipment.
6. Material Comparison & Workpiece Matrix
Understanding grade characteristics ensures maximum metal removal rates and safeguards against premature edge breakdown.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Alloy Steel) | Chromium-molybdenum steel, nickel-chromium steel, structural alloy | Excellent (Primary Alloy Turning Application) |
| M (Stainless Steel) | Austenitic and precipitation-hardening stainless steels | Good (Stable Continuous Finishing) |
| K (Cast Iron) | Gray cast iron, ductile iron | Conditional / Light general finishing |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized manufacturers, guaranteeing verified batch authenticity and consistent industrial tool performance.
Fast Global Logistics
Maintained warehouse inventory and optimized international shipping lines ensure rapid dispatch to eliminate production line bottlenecks.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting.
8. Frequently Asked Questions (FAQ)
Q: What are the main advantages of the NC3020 grade when machining alloy steels?
A: The NC3020 grade utilizes a specialized PVD multi-layer coating that provides superior resistance against high thermal loads and abrasive flank wear, ensuring extended tool life in alloy steel turning.
Q: How many inserts are included in each factory package?
A: Each standard industrial box contains 10 factory-sealed indexable carbide inserts, individually protected against shipping shock and environmental contamination.
Q: Is the SCMT09T304-HMP suitable for interrupted cutting conditions?
A: It is optimized primarily for continuous and light interrupted turning. For heavy interrupted cuts, adjusting feed rates downward or selecting a tougher substrate grade is recommended.
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.