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See Chinese contents: GB/T 3077-1999 GB/T 3077-1999: Alloy structure steels
This Standard specifies the hot rolled and forging alloy structure steels dimension, shape, weight, tolerance, technical requirements, test method, inspection rules, packaging, marking, and quality certificates etc. This Standard applies to alloy structural steel bars of which the diameter or thickness is not greater than 250mm. After negotiation by supplier and purchaser, it can provide steel bars of which the diameter or thickness is greater than 250 mm.
