Q: What are the mandatory inspection items for SPCC upon arrival?
A: Chemical composition (spectral density), mechanical properties (tensile strength/hardness), dimensional accuracy, surface quality, and surface roughness.
Q: How to determine if the surface defects of SPCC are acceptable?
A: Pitting/scratching depth ≤ 1/2 of thickness tolerance; no cracks, scars, or delamination; oxidation color should not affect subsequent processing.
Q: How to accurately measure the thickness of SPCC?
A: Use a micrometer/thickness gauge, take multiple measurements at 1/4, 1/2, and 3/4 of the plate width, take the average value, and the deviation should be ≤ the tolerance range.
Q: What indicators does SGS usually focus on when inspecting SPCC?
A: Thickness, dimensions, surface quality, mechanical properties, chemical composition, and whether it conforms to the contractually agreed standards (e.g., 3105).
Q: What should the Material Certificate (MTR) for SPCC include?
A: Furnace batch number, specifications, chemical composition, mechanical properties, applicable standards, heat treatment status, surface grade, and inspection stamp.