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International Standard Category: Steel profiles

GB/T 4697-2008    Hot-rolled U-type steel for mine timbering
矿山巷道支护用热轧U型钢;
Category No.:77.140.70 Valid Status:superseded
Issued Organization:AQSIQ,SAC Issued Date:2008-8-5
Implemented Date:2009-4-1 Abolished Date:
Superseded Standard.:GB/T 4697-2017 Hot rolled steel section for mine timbering
Superseded Date:2018-4-1
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