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Technical Specifications
Product Overview
Metallurgical Characteristics
JIS SS400 is a low-carbon structural steel with a predominantly ferritic-pearlitic microstructure. The controlled carbon content (≤0.050%) ensures excellent weldability and formability, while the manganese content provides adequate strength and toughness. The steel exhibits fine grain structure through controlled rolling processes, contributing to its balanced mechanical properties.
Manufacturing Process
MetalZenith produces JIS SS400 using advanced electric arc furnace steelmaking followed by ladle refining for precise chemistry control. The steel undergoes continuous casting to ensure homogeneous structure and minimal segregation. Hot rolling is performed with controlled finishing temperatures to achieve optimal grain refinement and mechanical properties. Optional normalizing heat treatment at 900-950°C provides stress relief and improved dimensional stability.
Heat Treatment Options
While JIS SS400 is typically supplied in the hot-rolled condition, various heat treatment options are available: Normalizing (900-950°C) for stress relief and grain refinement, annealing (650-700°C) for improved machinability, and stress relieving (550-650°C) for dimensional stability in welded structures.
Quality Standards & Testing
All JIS SS400 products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, tensile testing per JIS Z 2241, impact testing per JIS Z 2242, and ultrasonic inspection per JIS G 0801. MetalZenith maintains full traceability from raw materials through final inspection, with test certificates provided per EN 10204 3.1 standards. Additional testing such as magnetic particle inspection, hardness mapping, and microstructural analysis is available upon request.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.050 |
| Silicon (Si) | ≤ 0.035 |
| Manganese (Mn) | ≤ 1.60 |
| Phosphorus (P) | ≤ 0.050 |
| Sulfur (S) | ≤ 0.050 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.25 |
| Copper (Cu) | ≤ 0.30 |
| Aluminum (Al) | 0.015-0.065 |
| Nitrogen (N) | ≤ 0.012 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 400-510 MPa |
| Yield Strength | ≥ 245 MPa |
| Elongation (50mm gauge) | ≥ 17% |
| Elongation (200mm gauge) | ≥ 21% |
| Brinell Hardness (HB) | 120-160 |
| Vickers Hardness (HV) | 125-170 |
| Impact Energy (Charpy V-notch, 20°C) | ≥ 27 J |
| Fatigue Limit (10^7 cycles) | 180-220 MPa |
| Young's Modulus | 200-210 GPa |
| Shear Modulus | 80-85 GPa |
| Poisson's Ratio | 0.27-0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (20°C) | 54 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity (20°C) | 0.16 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Thermal Diffusivity | 13.8 mm²/s |
| Emissivity (oxidized surface) | 0.79 |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Beams, Channels, Angles, Tubes, Pipes |
| Plate Thickness | 6-200 mm |
| Sheet Thickness | 0.5-6 mm |
| Bar Diameter | 10-300 mm |
| Standard Dimensions | 1500×6000 mm, 2000×6000 mm, 2500×12000 mm |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted, Machined |
| Tolerance Class | Normal (N), Special (S) per JIS G 3193 |
| Standards Compliance | JIS G 3101, ASTM A36 (equivalent), EN S235JR (equivalent) |
| Edge Condition | Mill Edge, Slit Edge, Sheared Edge |
| Delivery Condition | Hot Rolled, Normalized, As-Required |
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Our Advantages in Processing JIS SS400
Advanced Electric Arc Furnace Technology
MetalZenith utilizes cutting-edge electric arc furnace technology with precise temperature control and automated charging systems, ensuring consistent chemical composition and superior steel quality. Our advanced ladle metallurgy station enables precise alloy additions and degassing processes for optimal steel cleanliness.
Comprehensive Quality Control System
Our integrated quality management system features real-time monitoring throughout production, including spectroscopic analysis, mechanical testing laboratories, and non-destructive testing capabilities. Every batch undergoes rigorous inspection with full traceability and certification to JIS G 3101 standards.
Flexible Customization & Global Supply
MetalZenith offers extensive customization options including specific dimensions, surface treatments, and packaging requirements. Our global distribution network and strategic inventory locations ensure reliable supply chain management with competitive lead times and comprehensive technical support worldwide.
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