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We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
JIS SKD61 is a premium chromium-molybdenum-vanadium hot work tool steel with exceptional thermal fatigue resistance and high-temperature strength retention. The alloy's microstructure consists of tempered martensite with uniformly distributed carbides, providing optimal balance between hardness, toughness, and thermal shock resistance. MetalZenith's advanced vacuum melting process ensures minimal segregation and superior cleanliness levels.
Heat Treatment Process
Our comprehensive heat treatment protocol includes preheating to 650-700°C, austenitizing at 1000-1030°C with controlled atmosphere protection, followed by air cooling or oil quenching depending on section size. Tempering is performed at 550-650°C to achieve target hardness of 48-52 HRC. Multiple tempering cycles ensure dimensional stability and stress relief for critical applications.
Manufacturing Excellence
MetalZenith employs electric arc furnace melting followed by ladle refining and vacuum degassing to achieve superior steel cleanliness. Our forging operations utilize computer-controlled hydraulic presses with precise temperature monitoring to ensure optimal grain structure and mechanical properties. All products undergo comprehensive ultrasonic testing and dimensional verification.
Quality Standards & Certifications
Our SKD61 production maintains strict adherence to international standards including JIS G4404, ASTM A681, and EN ISO 4957. Quality management systems comply with ISO 9001:2015, AS9100D for aerospace applications, and IATF 16949 for automotive tooling. Complete traceability documentation and third-party verification services are available for all critical applications requiring enhanced quality assurance protocols.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.32-0.45 |
| Silicon (Si) | 0.80-1.20 |
| Manganese (Mn) | 0.25-0.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 4.80-5.50 |
| Molybdenum (Mo) | 1.00-1.50 |
| Vanadium (V) | 0.80-1.20 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 1450-1650 MPa | Hardened & Tempered |
| Yield Strength | 1200-1400 MPa | Hardened & Tempered |
| Elongation | 8-12% | Hardened & Tempered |
| Reduction of Area | 35-45% | Hardened & Tempered |
| Hardness (HRC) | 48-52 | Working Hardness |
| Impact Energy (Charpy V) | 15-25 J | At Room Temperature |
| Fatigue Limit | 650-750 MPa | 107 cycles |
| Elastic Modulus | 215 GPa | At 20°C |
🔬 Physical Properties
| Property | Value | Temperature |
|---|---|---|
| Density | 7.80 g/cm³ | 20°C |
| Melting Point | 1480-1520°C | - |
| Thermal Conductivity | 24.5 W/m·K | 20°C |
| Thermal Conductivity | 28.2 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 | 0.55 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | - |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, square bars, plates, blocks, forgings |
| Round Bar Diameter | 10-500 mm |
| Flat Bar Dimensions | Thickness: 10-200 mm, Width: 50-500 mm |
| Plate Thickness | 20-300 mm |
| Length | Up to 6000 mm (custom lengths available) |
| Surface Finish | Hot rolled, annealed, machined, ground |
| Dimensional Tolerance | h9-h11 (machined), ±1-3 mm (hot rolled) |
| Standards Compliance | JIS G4404, ASTM A681, EN ISO 4957, GB/T 1299 |
| Heat Treatment Condition | Annealed (≤255 HB), hardened & tempered (48-52 HRC) |
| Quality Certificates | Mill test certificate, EN 10204 3.1, third-party inspection |
Let Us Create Success for Your Project
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Our Advantages in Processing JIS SKD61
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce ultra-clean SKD61 steel with minimal inclusions, superior homogeneity, and enhanced mechanical properties for critical tooling applications.
Comprehensive Heat Treatment Services
Our in-house heat treatment facilities feature computer-controlled furnaces with precise temperature uniformity (±5°C), enabling optimized hardening, tempering, and stress relief processes to achieve target hardness levels and maximize tool life performance.
Global Supply Chain & Custom Solutions
MetalZenith offers flexible inventory management, rapid delivery worldwide, and comprehensive customization services including precision machining, surface treatments, and application-specific heat treatment to meet exact customer specifications and delivery requirements.
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