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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI H13 is a secondary hardening hot work tool steel with a tempered martensitic microstructure. The chromium content provides oxidation resistance and hardenability, while molybdenum enhances high-temperature strength and thermal fatigue resistance. Vanadium forms fine carbides that contribute to wear resistance and grain refinement. The balanced alloy composition ensures excellent thermal shock resistance and dimensional stability during thermal cycling.
Heat Treatment Process
MetalZenith employs precise heat treatment protocols for optimal performance. Annealing is conducted at 870-900°C followed by slow cooling to achieve 207-255 HB hardness. Hardening involves austenitizing at 1010-1030°C, followed by air or oil quenching and tempering at 540-650°C to achieve working hardness of 45-52 HRC. Multiple tempering cycles may be applied to ensure stress relief and dimensional stability.
Manufacturing Process
Our AISI H13 production begins with electric arc furnace melting followed by ladle refining and vacuum degassing. Secondary refining through electroslag remelting (ESR) or vacuum arc remelting (VAR) ensures superior cleanliness and homogeneity. Hot forging and controlled cooling optimize the microstructure, while subsequent machining and heat treatment deliver precise dimensional and mechanical properties.
Quality Standards & Testing
MetalZenith maintains rigorous quality control throughout production. Chemical composition is verified by optical emission spectroscopy, while mechanical properties are validated through tensile testing, hardness measurement, and impact testing. Non-destructive testing including ultrasonic inspection and magnetic particle testing ensures internal soundness. All products are supplied with comprehensive mill test certificates documenting compliance with applicable standards and customer specifications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.32-0.45 |
| Silicon (Si) | 0.80-1.20 |
| Manganese (Mn) | 0.20-0.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 4.75-5.50 |
| Molybdenum (Mo) | 1.10-1.75 |
| Vanadium (V) | 0.80-1.20 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Annealed) | 850-1000 MPa |
| Yield Strength (Annealed) | 550-650 MPa |
| Elongation (Annealed) | 15-20% |
| Reduction of Area (Annealed) | 45-55% |
| Hardness (Annealed) | 207-255 HB |
| Hardness (Quenched & Tempered) | 45-52 HRC |
| Impact Energy (Charpy V-notch) | 15-25 J |
| Fatigue Limit (R=-1) | 400-500 MPa |
| Compressive Strength | 2500-3000 MPa |
| Modulus of Elasticity | 210 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.80 g/cm³ |
| Melting Point | 1427°C |
| Thermal Conductivity (20°C) | 24.3 W/m·K |
| Thermal Conductivity (400°C) | 28.5 W/m·K |
| Thermal Expansion (20-100°C) | 11.2×10-6/K |
| Thermal Expansion (20-400°C) | 12.4×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.55 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Poisson's Ratio | 0.27-0.30 |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, plates, blocks, forged pieces |
| Round Bar Diameter | 10-500 mm |
| Flat Bar Thickness | 10-200 mm |
| Plate Thickness | 20-300 mm |
| Standard Length | 3000-6000 mm (custom lengths available) |
| Surface Finish | Hot rolled, annealed, machined, ground |
| Dimensional Tolerance | h9-h11 (precision machined: h7-h8) |
| Standards Compliance | ASTM A681, EN ISO 4957, JIS SKD61, GB/T 1299 |
| Heat Treatment Condition | Annealed, normalized, quenched & tempered |
| Quality Grades | Standard, premium (ESR), vacuum melted |
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Our Advantages in Processing AISI H13
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce ultra-clean AISI H13 steel with minimal inclusions and superior homogeneity, ensuring consistent performance in demanding hot work applications.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities feature precise temperature monitoring and atmosphere control, enabling optimal austenitizing, quenching, and tempering cycles that maximize the thermal fatigue resistance and toughness of AISI H13 steel.
Comprehensive Customization Services
MetalZenith offers extensive customization capabilities including precision machining, surface treatments, and specialized heat treatment schedules tailored to specific customer requirements, supported by our global supply chain and technical engineering team.
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