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See Chinese contents: GB/T 6723-2017 GB/T 6723-2017: Cold forming open section steel for general structure
This Standard specifies the order content, classification, code, section size and allowable deviation, length and allowable deviation, shape, technical requirements, weight and marking examples of cold forming open section steel for general structure. This Standard is applicable to cold forming open section steel (hereinafter referred to as section steel) which is produced on continuous roll cold bending unit by cold-rolled or hot-rolled steel sheets.
