What are the main chemical components of SPCC?
A: (JIS G3141 standard)
Element Content (≤) Function
C (Carbon) 0.15% Determines strength, low carbon ensures plasticity
Mn (Manganese) 0.60% Deoxidizes, strengthens, improves toughness
P (Phosphorus) 0.10% Impurity, controls embrittlement
S (Sulfur) 0.035% Impurity, controls heat embrittlement
Si (Silicon) ≤0.05% Residue, deoxidation product
Fe Balance Matrix
Why is SPCC a low-carbon steel?
A: The low-carbon design (C ≤ 0.15%) is primarily for excellent cold-working plasticity, stamping properties, and weldability, but its strength is relatively lower.
What are the compositional differences between SPCC and Q195?
A:
SPCC: C≤0.15%, S≤0.035% (Japanese standard is stricter)
Q195: C 0.06~0.12%, S≤0.05% (Chinese standard is slightly more lenient)
What is the tensile strength of SPCC?
A: ≥ 270 MPa (typically 270~350 MPa, varies with thickness).
What is the yield strength of SPCC?
A: Typical 140~210 MPa (lower for thinner plates, higher for thicker plates).