GB/T 699-1999 Translated English of Chinese Standard. (GBT 699-1999, GB/T699-1999, GBT699-1999): Quality carbon structural steels
https://www.chinesestandard.net, 2014 M12 14 - 18 pages
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.
billet to substitute buyer Carbon Structural Steels chemical composition chromium cold upsetting comply with relevant content of steels contract copper content Corrigendum cross-section decarburized layer delivery diameter or thickness dimensions and allowance greater than 250mm guarantee the conformance higher than 0.20 hot forged hot pressed hot upsetting impact test imperfection of steel inclusion’s inspection result inspected and accepted judging rules larger than 80mm macro-test macroscopic structure manganese content marking and quality material for cutting material shall comply mechanical properties metals GB/T non-metallic inclusions Normative References phosphorus contents Quality Carbon Structural quality certificates Quality Steel quenched re-forged to test re-inspection and judging relevant stipulations round and square September 26 silicon content smelted Special Requirements standard GB/T steel material delivered steel products steel wire Steels for upsetting steels shall comply stipulations in Table substitute small pieces sulfur and phosphorus supplier can guarantee test methods test of metals upsetting test weight and allowance