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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI M35 is a tungsten-molybdenum type high speed steel enhanced with 5% cobalt addition. The cobalt significantly improves hot hardness retention, wear resistance, and cutting performance at elevated temperatures. The steel exhibits a complex carbide structure consisting of MC (vanadium-rich), M6C (tungsten-molybdenum-rich), and M23C6 (chromium-rich) carbides distributed in a martensitic matrix.
Heat Treatment Process
MetalZenith's optimized heat treatment includes preheating to 850°C, austenitizing at 1210-1230°C in protective atmosphere, followed by quenching in oil or salt bath. Tempering is performed at 540-580°C for 2-3 cycles to achieve desired hardness of 64-67 HRC. Our controlled atmosphere furnaces ensure minimal decarburization and optimal microstructure.
Manufacturing Process
Our production process begins with vacuum induction melting (VIM) of premium raw materials, followed by electroslag remelting (ESR) for enhanced cleanliness. The ingots undergo controlled forging and rolling operations to achieve optimal grain flow and carbide distribution. Advanced powder metallurgy routes are also available for superior homogeneity and fine carbide structure.
Quality Standards & Testing
All AISI M35 products comply with ASTM A600 specifications and undergo comprehensive quality control including chemical analysis by optical emission spectroscopy, mechanical property testing, microstructural examination, and ultrasonic inspection. MetalZenith maintains ISO 9001:2015 certification and provides complete material traceability with certified test reports for every shipment.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.90 - 0.98 |
| Manganese (Mn) | ≤ 0.40 |
| Silicon (Si) | ≤ 0.45 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 3.75 - 4.50 |
| Molybdenum (Mo) | 4.50 - 5.50 |
| Tungsten (W) | 5.50 - 6.75 |
| Vanadium (V) | 1.75 - 2.20 |
| Cobalt (Co) | 4.75 - 5.25 |
| Nickel (Ni) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (Annealed) | 255 - 285 HB |
| Hardness (Hardened & Tempered) | 64 - 67 HRC |
| Hot Hardness (600°C) | 52 - 55 HRC |
| Tensile Strength (Annealed) | 1030 - 1200 MPa |
| Yield Strength (Annealed) | 650 - 750 MPa |
| Elongation (Annealed) | 8 - 12% |
| Reduction of Area (Annealed) | 15 - 25% |
| Impact Energy (Annealed) | 25 - 35 J |
| Compressive Strength | ≥ 3500 MPa |
| Fatigue Limit | 450 - 550 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.25 g/cm³ |
| Melting Point | 1480 - 1520°C |
| Thermal Conductivity (20°C) | 24 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 11.5×10-6/K |
| Thermal Expansion Coefficient (20-600°C) | 13.2×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.65 µΩ·m |
| Young's Modulus | 230 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
| Magnetic Permeability | Paramagnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, forged blocks |
| Round Bar Diameter | 6 - 300 mm |
| Flat Bar Dimensions | 10-100 mm thickness, up to 300 mm width |
| Plate Thickness | 10 - 150 mm |
| Length | Up to 6000 mm (custom lengths available) |
| Standards | ASTM A600, DIN EN ISO 4957, JIS SKH59 |
| Surface Finish | Hot rolled, cold drawn, turned, ground |
| Dimensional Tolerance | h9 to h11 (±0.1 to ±0.5 mm) |
| Condition | Annealed, hardened & tempered |
| Packaging | Wooden crates, steel bundles, protective coating |
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Our Advantages in Processing AISI M35
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce ultra-clean AISI M35 with minimal inclusions, superior carbide distribution, and enhanced mechanical properties for demanding applications.
Precision Heat Treatment & Quality Control
Our proprietary heat treatment protocols and comprehensive quality control systems ensure consistent microstructure optimization, precise hardness control, and dimensional accuracy. Every batch undergoes rigorous testing with full material certification and traceability.
Global Supply Chain & Custom Solutions
MetalZenith offers flexible customization options including specialized dimensions, surface treatments, and packaging. Our global distribution network ensures reliable delivery worldwide with comprehensive technical support and engineering consultation services.
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