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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI M42 is a cobalt-bearing high speed steel with exceptional hot hardness retention and wear resistance. The high cobalt content (8%) provides superior red hardness, maintaining cutting edge integrity at elevated temperatures up to 600°C. The steel contains a complex carbide structure including MC (vanadium-rich), M6C (molybdenum-rich), and M23C6 carbides that contribute to its outstanding wear resistance.
Heat Treatment Process
MetalZenith's precision heat treatment process involves preheating to 850°C, austenitizing at 1220-1240°C in protective atmosphere, followed by quenching in oil or salt bath. Triple tempering at 540-560°C ensures optimal secondary hardness and dimensional stability. Our computer-controlled furnaces maintain temperature uniformity within ±5°C throughout the treatment cycle.
Manufacturing Excellence
MetalZenith employs vacuum induction melting (VIM) followed by electroslag remelting (ESR) to achieve superior cleanliness and homogeneity. Our powder metallurgy route offers enhanced carbide distribution and improved transverse properties. Advanced forging and rolling processes ensure optimal grain structure and mechanical properties in all directions.
Quality Standards & Testing
Every batch undergoes comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical property verification, microstructural examination, and ultrasonic inspection. Our ISO 9001:2015 certified quality system ensures full traceability and compliance with international standards including ASTM A600, DIN EN ISO 4957, and JIS G4403.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 1.05 - 1.15 |
| Manganese (Mn) | ≤ 0.40 |
| Silicon (Si) | ≤ 0.45 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 3.50 - 4.25 |
| Nickel (Ni) | ≤ 0.30 |
| Molybdenum (Mo) | 9.00 - 10.00 |
| Tungsten (W) | 1.15 - 1.85 |
| Vanadium (V) | 1.00 - 1.40 |
| Cobalt (Co) | 7.75 - 8.75 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (As Hardened) | 65-67 HRC |
| Hardness (Tempered at 540°C) | 64-66 HRC |
| Hot Hardness (600°C) | 58-60 HRC |
| Tensile Strength (Annealed) | 850-950 MPa |
| Yield Strength (Annealed) | 550-650 MPa |
| Elongation (Annealed) | 8-12% |
| Reduction of Area (Annealed) | 15-25% |
| Impact Energy (Annealed) | 25-35 J |
| Elastic Modulus | 230 GPa |
| Compressive Strength | 4200-4800 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.25 g/cm³ |
| Melting Point | 1350-1400°C |
| Thermal Conductivity (20°C) | 24 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 10.5×10-6/K |
| Thermal Expansion Coefficient (20-600°C) | 12.8×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.85 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 850°C |
| Thermal Diffusivity | 6.3 mm²/s |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, forged blocks, powder metallurgy products |
| Round Bar Diameter | 6-300 mm |
| Flat Bar Dimensions | 10-100 mm thickness, up to 300 mm width |
| Plate Thickness | 10-200 mm |
| Sheet Thickness | 0.5-10 mm |
| Length | Up to 6000 mm (custom lengths available) |
| Surface Finish | Hot rolled, cold drawn, ground, polished, machined |
| Dimensional Tolerance | h9-h11 (precision ground: h7-h8) |
| Standards Compliance | ASTM A600, DIN EN ISO 4957, JIS G4403 |
| Condition | Annealed, hardened and tempered, soft annealed |
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Our Advantages in Processing AISI M42
Advanced Vacuum Melting Technology
MetalZenith utilizes state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce AISI M42 with exceptional cleanliness, minimal inclusions, and superior carbide distribution for enhanced tool performance and longevity.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities with precise atmosphere control ensure consistent hardness profiles and optimal microstructure. Advanced quenching and tempering processes deliver uniform properties throughout the material cross-section.
Custom Processing & Global Supply
MetalZenith offers comprehensive custom processing including precision machining, surface treatments, and specialized geometries. Our global distribution network ensures reliable supply with flexible packaging and just-in-time delivery capabilities worldwide.
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