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Technical Specifications
Product Overview
Metallurgical Characteristics
JIS SKS3 is a high-carbon, low-alloy tool steel with a pearlitic microstructure in the annealed condition. The steel contains spheroidized carbides distributed in a ferrite matrix, providing excellent machinability while maintaining hardenability. The addition of chromium and tungsten enhances wear resistance and provides moderate hot hardness.
Heat Treatment Process
MetalZenith's optimized heat treatment protocol includes:
- Annealing: 750-780°C, slow cooling to achieve 207-255 HB
- Hardening: 780-820°C, oil quenching to achieve 60-64 HRC
- Tempering: 150-200°C for maximum hardness, 400-500°C for toughness
- Stress relieving: 600-650°C after machining operations
Manufacturing Process Excellence
Our production process begins with carefully selected raw materials melted in electric arc furnaces under controlled atmospheric conditions. Secondary refining through ladle metallurgy ensures precise chemistry control and inclusion modification. Hot rolling is performed using computer-controlled mills with precise temperature monitoring to achieve optimal grain structure and mechanical properties.
Quality Standards & Testing
MetalZenith maintains strict adherence to JIS G 4401 standards and implements comprehensive quality control measures including chemical analysis by optical emission spectroscopy, mechanical testing per JIS Z 2241, microstructural examination, and ultrasonic testing for internal soundness. All products are supplied with certified test reports and full traceability documentation.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.85-1.00 |
| Silicon (Si) | 0.10-0.35 |
| Manganese (Mn) | 1.00-1.40 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 0.40-0.70 |
| Tungsten (W) | 0.40-0.70 |
| Nickel (Ni) | ≤ 0.25 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 750-850 MPa | Annealed |
| Yield Strength | 450-550 MPa | Annealed |
| Elongation | 15-20% | Annealed |
| Reduction of Area | 35-45% | Annealed |
| Hardness (Annealed) | 207-255 HB | Annealed |
| Hardness (Quenched & Tempered) | 60-64 HRC | Oil Quenched |
| Impact Energy (Charpy V-notch) | 25-35 J | Annealed |
| Fatigue Limit | 350-400 MPa | 10&sup7; cycles |
🔬 Physical Properties
| Property | Value | Temperature |
|---|---|---|
| Density | 7.85 g/cm³ | 20°C |
| Melting Point | 1420-1460°C | - |
| Thermal Conductivity | 42 W/m·K | 20°C |
| Thermal Expansion Coefficient | 11.5×10-6/K | 20-100°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.25 µΩ·m | 20°C |
| Young's Modulus | 210 GPa | 20°C |
| Poisson's Ratio | 0.27-0.30 | 20°C |
| Magnetic Permeability | Ferromagnetic | 20°C |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, forged blocks | JIS G 4401 |
| Round Bar Diameter | 6-300 mm | JIS G 4401 |
| Flat Bar Thickness | 3-100 mm | JIS G 4401 |
| Plate Thickness | 10-200 mm | JIS G 4401 |
| Surface Finish | Hot rolled, cold drawn, turned, ground | Custom specifications |
| Length Tolerance | +0/-5 mm (standard), ±1 mm (precision) | JIS G 4401 |
| Diameter Tolerance | h9-h11 (turned), ±0.5 mm (hot rolled) | JIS B 0401 |
| Heat Treatment Condition | Annealed, normalized, quenched & tempered | Customer specified |
| Equivalent Standards | AISI O1, DIN 1.2510, BS BO1 | International |
Let Us Create Success for Your Project
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Our Advantages in Processing JIS SKS3
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting and electroslag remelting processes to produce JIS SKS3 with exceptional cleanliness and homogeneity. Our controlled atmosphere melting eliminates harmful inclusions and ensures consistent chemical composition throughout the steel matrix.
Precision Heat Treatment Control
Our state-of-the-art heat treatment facilities feature computer-controlled furnaces with precise temperature monitoring and atmosphere control. This ensures optimal hardness distribution, minimal distortion, and consistent mechanical properties across all product dimensions.
Comprehensive Customization Services
MetalZenith offers extensive customization capabilities including precision machining, surface treatments, and special packaging. Our technical team provides application-specific heat treatment recommendations and can supply material in various conditions to meet exact customer requirements.
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