What is Q195 steel?
Q195 is ordinary carbon structural steel, belonging to the category of low-carbon steel, and conforms to the national standard GB/T 700. "Q" represents yield strength, and "195" means that the yield strength is ≥195MPa when the thickness is ≤16mm.
What are the core mechanical properties of Q195?
Yield strength: ≥195MPa for ≤16mm; ≥185MPa for 16-40mm
Tensile strength: 315-430MPa
Elongation: ≥33% for ≤16mm; ≥32% for 16-40mm
What are the characteristics of the chemical composition of Q195?
Carbon content ≤0.12%, containing small amounts of manganese, silicon, sulfur, and phosphorus. It is low-carbon and low-alloy steel, ensuring good plasticity and weldability.
What are the core differences between Q195 and Q235 and Q345? Strength increases sequentially (Q195 < Q235 < Q345). Q195 has the best plasticity and weldability, and the lowest cost, making it suitable for low-load applications; Q235/Q345 are used for load-bearing structures.
What are the corresponding international grades for Q195?
ISO: HR2; ASTM: Gr.B; JIS: SS330; DIN: St33.