Q: What is the typical chemical composition of SPCC?
A: C≤0.12%, Mn≤0.50%, P≤0.035%, S≤0.035%, Si≤0.05%, Al≥0.02% (killed steel).
Q: What is the range of mechanical properties of SPCC?
A: Tensile strength 270-410MPa, yield strength ≥180MPa, elongation ≥34% (standard quenching and tempering); the harder the temper, the higher the yield strength and the lower the elongation.
Q: How to choose different temper levels?
A: Use A (annealed only) or S for deep drawing; use 1/8 hard for general bending/shallow drawing; use 1/4 hard to 1 hard for high-strength parts.
Q: What are the weldability properties of SPCC?
A: Its low carbon content makes it highly weldable, suitable for arc welding and resistance welding; minimal post-weld deformation, no preheating required (plate thickness <6mm). Q: What is the hardness range of SPCC?
A: Standard tempered hardness HV≈60-80; 1/2 hard hardness HV≈100-130; 1 hardness HV≈140-170 (Vickers hardness).