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Technical Specifications
Product Overview
Metallurgical Characteristics
ASTM A588 is a high-strength, low-alloy (HSLA) steel with enhanced atmospheric corrosion resistance achieved through controlled additions of copper, chromium, nickel, and phosphorus. The steel develops a protective patina layer of stable rust that acts as a barrier against further corrosion, providing 4-8 times better corrosion resistance than conventional carbon steel.
Manufacturing Process
MetalZenith produces ASTM A588 using electric arc furnace steelmaking followed by ladle refining for precise chemistry control. The steel undergoes controlled rolling at temperatures between 1050-1200°C, followed by accelerated cooling to achieve optimal microstructure consisting of fine-grained ferrite-pearlite with precipitation strengthening from microalloying elements.
Heat Treatment Options
While ASTM A588 is typically supplied in the hot-rolled condition, stress relief annealing at 580-650°C may be performed for heavy sections. Normalizing at 900-950°C can be applied to improve toughness and homogenize microstructure. Welding preheat of 150-200°C is recommended for thick sections.
Quality Standards & Testing
All ASTM A588 products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, tensile testing per ASTM A370, Charpy impact testing, and atmospheric corrosion resistance evaluation. Non-destructive testing includes ultrasonic inspection for internal soundness and dimensional verification using coordinate measuring machines.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.10-0.19 |
| Manganese (Mn) | 0.80-1.25 |
| Silicon (Si) | 0.30-0.65 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.05 |
| Chromium (Cr) | 0.40-0.65 |
| Nickel (Ni) | 0.25-0.40 |
| Copper (Cu) | 0.25-0.40 |
| Vanadium (V) | 0.02-0.10 |
| Aluminum (Al) | ≤ 0.015 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 485-620 MPa |
| Yield Strength (0.2% offset) | ≥ 345 MPa |
| Elongation in 200mm | ≥ 18% |
| Elongation in 50mm | ≥ 21% |
| Brinell Hardness (HB) | 140-200 |
| Charpy V-Notch Impact (at 21°C) | ≥ 27 J |
| Fatigue Limit (10^7 cycles) | 240 MPa |
| Modulus of Elasticity | 200 GPa |
| Poisson's Ratio | 0.27-0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (at 20°C) | 52 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity | 0.18 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Structural Shapes, Tubes |
| Plate Thickness | 6-100 mm |
| Sheet Thickness | 1.5-6 mm |
| Width Range | 1000-3000 mm |
| Length Range | 2000-12000 mm |
| Standards Compliance | ASTM A588, EN 10025-5 S355J0WP, JIS G3114 SMA490AW |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted |
| Dimensional Tolerance | ±0.5mm thickness, ±5mm width/length |
| Edge Condition | Mill Edge, Slit Edge, Flame Cut |
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Our Advantages in Processing ASTM A588
Advanced Thermomechanical Processing
MetalZenith utilizes cutting-edge controlled rolling and accelerated cooling technology to optimize the microstructure of ASTM A588 steel, ensuring superior mechanical properties and enhanced weathering resistance through precise grain refinement and precipitation control.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory conducts rigorous chemical analysis, mechanical testing, and atmospheric corrosion simulation testing. Every batch undergoes ultrasonic inspection, dimensional verification, and surface quality assessment with full traceability documentation.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision cutting, forming, and surface preparation services. Our global distribution network ensures reliable delivery worldwide with flexible packaging options and technical support throughout the supply chain.
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