Characteristics of JIS G3101 SS490 Steel:
Balanced High Strength and Toughness
Tensile Strength: 490-610 MPa; Yield Strength: ≥325 MPa (for thickness ≤16 mm), meeting load-bearing requirements for structural components.
Elongation After Fracture: ≥17% (for thickness ≤16 mm), ensuring sufficient plastic deformation capacity under stress and preventing brittle fracture.
Low-Temperature Toughness: Although impact testing is not mandatory, low-temperature toughness can be enhanced by adjusting chemical composition (e.g., reducing phosphorus and sulfur content) or heat treatment processes to meet engineering demands in cold regions.
Excellent Weldability
Low Carbon Equivalent Design: Carbon content ≤0.30% and manganese content ≤1.60% effectively reduce hardening tendencies in the welding heat-affected zone (HAZ), minimizing crack risks.
Compatibility with Multiple Welding Processes: Supports arc welding, gas metal arc welding (GMAW/MIG), submerged arc welding (SAW), etc., suitable for rapid on-site assembly or factory prefabrication.
Stable Post-Weld Performance: High matching strength between welded joints and base metal, eliminating the need for complex preheating or post-heat treatment and reducing construction costs.
Good Process Adaptability
Cold Bending Performance: Capable of withstanding 180° cold bending tests, suitable for cold forming processes like flanging and curling.
Machinability: Easy to machine via turning, milling, drilling, etc., ideal for manufacturing high-precision components.
Surface Treatment Compatibility: Supports anti-corrosion treatments such as sandblasting, painting, and galvanizing to extend service life.
