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See Chinese contents: GB/T 699-1999 GB/T 699-1999: [Replaced by GB/T 699-2015] Quality carbon structural steels
This standard specifies the size, dimensions, weight and allowance, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of hot rolled or forged quality carbon structural steels. This standard is applicable to quality carbon structural steel bars with diameter or thickness not greater than 250mm. Those with diameter or thickness greater than 250mm may also be supplied, per agreement by both parties the buyer and the supplier. The designations and chemical composition as specified in this standard are also applicable to steel ingots, steel billets and their manufactures.
