Q: How to prevent SPCC from rusting?
A: Short-term use of rust-preventive oil/vapor phase rust-preventive paper, medium-term galvanizing/passivation, long-term electrophoresis/powder coating; keep storage dry and well-ventilated.
Q: What are the control standards for SPCC dimensional deviations?
A: According to JIS G3141, thickness deviation ±0.05–±0.15mm (depending on thickness), width deviation ±2–±5mm, ensuring assembly accuracy.
Q: What are common internal defects in SPCC?
A: Delamination, inclusions, and porosity, mostly caused by raw materials or rolling processes, need to be investigated through flaw detection and incoming inspection.
Q: How to determine the conformity of SPCC?
A: Check the material certificate (MTC), verify the composition, mechanical properties, surface grade, dimensions, and appearance; third-party testing is necessary if required.
Q: What are the flatness requirements and adjustments for SPCC?
A: Wavyness ≤2mm/m, warpage ≤1mm/m; improved through roll leveling, annealing, or proper stacking.