1. Material Standard:
JIS G 3125 (Japanese Industrial Standard for superior atmospheric corrosion resistant steel)
2. Key Properties:
Forms a stable protective rust layer (patina) when exposed to weather
2-8x better corrosion resistance than carbon steel
Yield strength ≥355 MPa
Contains alloying elements (Cu, Cr, P, Ni) for weather resistance
3. Main Applications:
Shipping containers
Railway freight cars
Bridges and highway structures
Outdoor construction and architecture
4. Special Characteristics:
Self-protecting - develops patina that slows further corrosion
Often used unpainted to reduce maintenance
Weldable with proper procedures
5. Equivalent Grades:
ASTM A588 (US)
EN 10025-5 S355J0WP (Europe)
GB/T 4171 Q355NH (China)
6. Available Forms:
Thickness range typically 1.6mm to 200mm
Hot-rolled plates and coils
