Key Technical Parameters
Minimum Yield Strength: ≥345 MPa
Tensile Strength Range: 490-630 MPa
Elongation: ≥22%
Impact Toughness: ≥27J at -50°C (-5 grade designation)
Corrosion Resistance: 6-8 times better than carbon steel
Advanced Alloy Composition
Cu (0.25-0.45%): Forms stable protective patina
P (0.07-0.12%): Enhances atmospheric resistance
Ti (≤0.03%): Grain refinement for improved toughness
RE (Rare Earth): Optimized addition for enhanced properties
Cr (0.30-0.65%): Additional corrosion protection
Performance Characteristics
Extreme low-temperature toughness (-50°C performance)
Outstanding weathering resistance in harsh environments
Excellent fatigue resistance for dynamic load applications
Superior weldability with proper procedures
Self-forming protective oxide layer
Hot Tags: tb/t 1979 09cuptire-a 5 weather resistant steel, China tb/t 1979 09cuptire-a 5 weather resistant steel manufacturers, suppliers, factory
