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Technical Specifications
Product Overview
Metallurgical Characteristics
JIS SUP10 is a medium-carbon, low-alloy spring steel with chromium and vanadium additions that provide enhanced hardenability and grain refinement. The chromium content (0.70-1.00%) improves corrosion resistance and hardenability, while vanadium (0.15-0.25%) forms fine carbides that increase strength and wear resistance. The steel exhibits excellent fatigue properties due to its fine pearlitic microstructure in the normalized condition and tempered martensite in the quenched and tempered state.
Heat Treatment Process
MetalZenith's optimized heat treatment involves austenitizing at 850-880°C, followed by oil quenching to achieve full martensitic transformation. Tempering is performed at 400-550°C depending on the desired hardness level. Our controlled atmosphere furnaces ensure uniform heating and prevent decarburization. The resulting microstructure consists of tempered martensite with fine carbide precipitation, providing optimal strength-toughness balance.
Manufacturing Process Excellence
Production begins with electric arc furnace melting using high-grade scrap and alloy additions. Vacuum degassing removes hydrogen and reduces inclusion content to ≤ 0.015%. Continuous casting produces defect-free billets, which undergo controlled rolling with precise temperature control. MetalZenith's advanced rolling mills ensure uniform deformation and optimal grain structure development. Final processing includes precision cutting, surface treatment, and comprehensive quality inspection.
Quality Standards & Testing
All JIS SUP10 products undergo rigorous testing per JIS G4801 standards. Chemical analysis is performed using optical emission spectroscopy with ±0.005% accuracy. Mechanical testing includes tensile, impact, and fatigue evaluation using servo-hydraulic testing machines. Microstructural examination via optical and electron microscopy ensures proper heat treatment response. Non-destructive testing includes ultrasonic inspection for internal soundness and magnetic particle inspection for surface defects.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.48-0.53 |
| Silicon (Si) | 0.15-0.35 |
| Manganese (Mn) | 0.70-1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 0.70-1.00 |
| Vanadium (V) | 0.15-0.25 |
| Nickel (Ni) | ≤ 0.25 |
| Copper (Cu) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Quenched & Tempered) | 1275-1570 MPa |
| Yield Strength (0.2% Offset) | ≥ 1080 MPa |
| Elongation (50mm gauge) | ≥ 9% |
| Reduction of Area | ≥ 35% |
| Hardness (Quenched & Tempered) | 38-45 HRC |
| Impact Energy (Charpy V-notch) | ≥ 25 J |
| Fatigue Limit (10&sup7; cycles) | 550-650 MPa |
| Young's Modulus | 210 GPa |
| Shear Modulus | 81 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1420-1460°C |
| Thermal Conductivity (20°C) | 42-46 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.22-0.28 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Poisson's Ratio | 0.27-0.30 |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, square bars, plates, sheets, strips |
| Round Bar Diameter | 6-300 mm |
| Flat Bar Dimensions | 10-100 mm thickness, 20-300 mm width |
| Plate Thickness | 8-150 mm |
| Standard Lengths | 3000-12000 mm (custom lengths available) |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, polished |
| Dimensional Tolerance | h9-h11 (cold drawn), ±0.5-1.0 mm (hot rolled) |
| Standards Compliance | JIS G4801, ASTM A29, EN 10089 |
| Heat Treatment Condition | Annealed, normalized, quenched & tempered |
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Our Advantages in Processing JIS SUP10
Advanced Vacuum Degassing Technology
MetalZenith employs cutting-edge vacuum degassing and ladle refining processes to minimize sulfur and phosphorus content, ensuring superior cleanliness and fatigue life. Our controlled atmosphere melting technology produces JIS SUP10 with exceptional inclusion control and homogeneous chemical composition.
Precision Heat Treatment Capabilities
Our state-of-the-art heat treatment facilities feature computer-controlled furnaces with precise temperature uniformity (±5°C). MetalZenith's proprietary quenching and tempering processes optimize the microstructure for maximum spring performance, achieving consistent mechanical properties across all product dimensions.
Comprehensive Testing & Customization
MetalZenith provides complete material characterization including fatigue testing, fracture toughness evaluation, and spring constant verification. Our engineering team offers custom chemical compositions, specialized heat treatments, and application-specific processing to meet unique customer requirements with full technical support.
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