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Technical Specifications
Product Overview
Metallurgical Characteristics
JIS S136 is a martensitic stainless steel with a balanced chemical composition designed to provide excellent corrosion resistance combined with high mechanical strength. The chromium content of 12.5-14.5% ensures superior corrosion resistance, while the carbon content of 0.35-0.42% provides the necessary hardenability for achieving high strength levels. The addition of molybdenum and vanadium enhances wear resistance and grain refinement.
Heat Treatment Process
MetalZenith's optimized heat treatment process includes annealing at 840-880°C followed by slow cooling for stress relief and machinability. Hardening is performed at 1020-1050°C with oil or air quenching, followed by tempering at 150-200°C for maximum hardness or 500-600°C for improved toughness. Our controlled atmosphere furnaces ensure minimal decarburization and optimal surface quality.
Manufacturing Process
Our manufacturing process begins with electric arc furnace melting followed by ladle refining and vacuum degassing to achieve precise chemical composition and low inclusion content. The steel is cast into ingots and hot forged to break down the cast structure. Subsequent hot rolling and controlled cooling ensure uniform microstructure and mechanical properties throughout the cross-section.
Quality Standards & Testing
MetalZenith maintains strict quality control throughout production with chemical analysis by optical emission spectroscopy, mechanical testing per JIS Z2241, ultrasonic testing for internal soundness, and dimensional inspection. All products are supplied with material certificates including chemical composition, mechanical properties, and heat treatment records. Our quality management system complies with ISO 9001:2015 and automotive industry standards.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.35-0.42 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 12.5-14.5 |
| Nickel (Ni) | ≤ 0.60 |
| Molybdenum (Mo) | 0.15-0.30 |
| Vanadium (V) | 0.15-0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Quenched & Tempered) | 1180-1380 MPa |
| Yield Strength (0.2% Offset) | ≥ 980 MPa |
| Elongation | ≥ 12% |
| Reduction of Area | ≥ 45% |
| Hardness (Quenched & Tempered) | 36-42 HRC |
| Impact Energy (Charpy V-notch at 20°C) | ≥ 50 J |
| Fatigue Limit (107 cycles) | 480-520 MPa |
| Young's Modulus | 200-210 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.75 g/cm³ |
| Melting Point | 1480-1520°C |
| Thermal Conductivity (at 20°C) | 24.5 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 10.3×10-6/K |
| Thermal Expansion Coefficient (20-200°C) | 10.8×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity | 0.55 µΩ·m |
| Magnetic Properties | Ferromagnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, plates, blocks, forgings |
| Round Bar Diameter | 10-500 mm |
| Flat Bar Dimensions | 10-100 mm thickness, up to 300 mm width |
| Plate Thickness | 10-200 mm |
| Length | Up to 6000 mm (custom lengths available) |
| Surface Finish | Hot rolled, cold drawn, turned, ground, polished |
| Tolerance | h9-h11 (turned), ±0.1-0.5 mm (ground) |
| Standards | JIS G4404, ASTM A681, DIN 1.2083 equivalent |
| Heat Treatment Condition | Annealed, hardened & tempered, stress relieved |
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Our Advantages in Processing JIS S136
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and vacuum arc remelting (VAR) processes to produce JIS S136 with exceptional chemical homogeneity and minimal inclusion content, ensuring superior mechanical properties and extended tool life.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities with multi-zone temperature monitoring ensure precise austenitizing, quenching, and tempering cycles, delivering consistent hardness distribution and optimal microstructure for maximum performance and dimensional stability.
Comprehensive Customization Services
MetalZenith offers extensive customization capabilities including precision machining, surface treatments, and specialized heat treatment schedules tailored to specific application requirements, supported by our global supply chain and technical engineering team.
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