Characteristics of TB/T 1979 09CuPTiRE-B Steel
High Strength and Toughness:
Yield Strength: ≥345 MPa (for thickness ≤16 mm), decreasing with increased thickness (e.g., ≥275 MPa for 100–150 mm).
Tensile Strength: 480 MPa, suitable for heavy-load structures.
Elongation: ≥22%, ensuring plastic deformation capacity.
Low-Temperature Toughness: Impact energy ≥40 J at -40°C (optional verification via special processes), adapting to engineering projects in cold regions.
Basic Corrosion Resistance:
Silicon and manganese enhance atmospheric and water corrosion resistance, though the base material exhibits moderate corrosion resistance and requires additional protection.
The synergistic effect of copper and phosphorus forms a dense rust layer, reducing corrosion rates by over 50% compared to conventional steel.
Protection Requirements:
Galvanizing or epoxy resin coating is necessary for marine environments to mitigate pitting risks.
Alloying elements are uniformly distributed within the rust layer, providing strong resistance to spalling and ensuring high long-term reliability.
