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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI H11 is a premium hot work tool steel with a martensitic microstructure when hardened and tempered. The steel's composition features chromium for hardenability and oxidation resistance, molybdenum for high-temperature strength and toughness, and vanadium for grain refinement and carbide formation. MetalZenith's vacuum melting process ensures minimal inclusions and optimal carbide distribution for superior performance.
Heat Treatment Process
MetalZenith employs controlled atmosphere heat treatment with precise temperature monitoring. Annealing is performed at 870-900°C followed by slow cooling to achieve 217-255 HB hardness. Hardening involves austenitizing at 1010-1030°C, followed by air or oil quenching and tempering at 540-650°C to achieve desired hardness levels of 38-50 HRC. Multiple tempering cycles ensure stress relief and dimensional stability.
Manufacturing Process
Our production process begins with electric arc furnace melting using premium raw materials, followed by ladle refining and vacuum degassing. Electroslag remelting (ESR) ensures exceptional cleanliness and homogeneity. Hot forging and rolling operations are performed within controlled temperature ranges to optimize grain structure. All products undergo ultrasonic testing and dimensional inspection before delivery.
Quality Standards & Certifications
MetalZenith maintains ISO 9001:2015 certification and complies with ASTM A681, DIN 1.2343, and JIS SKD6 standards. Our quality control system includes complete chemical analysis using optical emission spectrometry, mechanical property testing, microstructural examination, and non-destructive testing. Each batch is accompanied by mill test certificates with full traceability documentation.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.33-0.43 |
| Manganese (Mn) | 0.20-0.50 |
| Silicon (Si) | 0.80-1.20 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 4.75-5.50 |
| Molybdenum (Mo) | 1.10-1.75 |
| Vanadium (V) | 0.30-0.60 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 1380-1720 MPa | Hardened & Tempered |
| Yield Strength (0.2% offset) | 1240-1550 MPa | Hardened & Tempered |
| Elongation | 8-15% | Hardened & Tempered |
| Reduction of Area | 35-55% | Hardened & Tempered |
| Hardness (HRC) | 38-50 | Hardened & Tempered |
| Impact Energy (Charpy V-notch) | 15-40 J | At Room Temperature |
| Fatigue Limit | 620-750 MPa | 10&sup7; cycles |
| Young's Modulus | 210 GPa | At 20°C |
| Poisson's Ratio | 0.27-0.30 | At 20°C |
🔬 Physical Properties
| Property | Value | Temperature |
|---|---|---|
| Density | 7.80 g/cm³ | 20°C |
| Melting Point | 1427°C | - |
| Thermal Conductivity | 24.9 W/m·K | 20°C |
| Thermal Conductivity | 28.5 W/m·K | 400°C |
| Thermal Expansion Coefficient | 11.5×10-6/K | 20-100°C |
| Thermal Expansion Coefficient | 12.8×10-6/K | 20-400°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.60 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | 20°C |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, flat bars, plates, blocks, forged pieces | ASTM A681 |
| Round Bar Diameter | 10-500 mm | ASTM A681 |
| Flat Bar Thickness | 8-200 mm | ASTM A681 |
| Plate Thickness | 20-300 mm | ASTM A681 |
| Length | Up to 6000 mm | Custom |
| Surface Finish | Hot rolled, annealed, machined, ground | ASTM A681 |
| Dimensional Tolerance | ±0.1 to ±1.0 mm | ASTM A681 |
| Heat Treatment Condition | Annealed, hardened & tempered, stress relieved | ASTM A681 |
| International Standards | ASTM A681, DIN 1.2343, JIS SKD6, GB 4Cr5MoSiV1 | Multiple |
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Our Advantages in Processing AISI H11
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce AISI H11 with exceptional cleanliness, reduced inclusions, and superior metallurgical homogeneity for enhanced tool life and performance.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities feature precise temperature monitoring and atmosphere control, ensuring optimal hardness distribution, stress relief, and microstructural uniformity throughout the entire cross-section of AISI H11 products.
Custom Processing & Global Supply
MetalZenith offers comprehensive customization including precision machining, surface treatments, and specialized heat treatment cycles. Our global distribution network ensures reliable delivery of AISI H11 steel products worldwide with full traceability and technical support.
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