GB/T 3280 is the common Chinese standard for cold-rolled stainless sheet and strip. Key clauses:

1) Grades and chemistry: designated with unified numeric codes such as 06Cr19Ni10; chemistry ranges are in the standard. Note Ni and Mo range differences when cross-referencing EN/ASTM. 2) Surface codes: 2B, BA, No.4 etc., with definitions and appearance requirements in the standard; agree a physical sample for appearance acceptance. 3) Dimensional tolerances: thickness, width and length tolerances reference GB/T 708; specify the tolerance class (normal or higher) in the contract. 4) Mechanical properties: tensile, yield and elongation per grade and delivery condition; cold-worked conditions have separate requirements. 5) Inspection rules: lot definition, sampling, retest and acceptance rules; add intergranular corrosion or surface requirements when needed. 6) Packaging and marking: the standard specifies packaging and marking; export projects must also meet the customer or destination requirements.

Purchasing tip: domestic orders often read "304, GB/T 3280, 2B, higher thickness tolerance class" — specifying grade, standard, surface and tolerance class is the clearest acceptance basis.