Reading GB/T 3280: surface codes, tolerances and inspection

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GB/T 3280 · standard clauses · surface codes · inspection

GB/T 3280 is the core Chinese standard for cold-rolled stainless sheet and strip. At purchasing, check surface codes, dimensional tolerances (referencing GB/T 708), mechanical properties and inspection rules.

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.

本文由 SteelWe 编辑与行业专家整理，内容仅供行业交流参考，不构成交易或投资建议。引用请注明来源。

Reading GB/T 3280: surface codes, tolerances and inspection

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.

本文由 SteelWe 编辑与行业专家整理，内容仅供行业交流参考，不构成交易或投资建议。引用请注明来源。