GB/T 1222-2016 Translated English of Chinese Standard. (GBT 1222-2016, GB/T1222-2016, GBT1222-2016): Spring steels
https://www.chinesestandard.net, 24.6.2018 - 40 sivua
The Standard specifies the terms and definitions, order contents, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of hot-rolled, forged and cold-drawn spring steels. The Standard is applicable to spring round steels and spring square steels with a nominal diameter or a side length of not more than 120 mm (hereinafter referred to as bars), spring flat steels with a nominal width of not more than 160 mm and a nominal thickness of not more than 60 mm, spring steel wire rods with a nominal diameter of not more than 40 mm. The grades and chemical composition specified in this Standard are also applicable to steel ingots, billets and their products.
informative Main technical parameters of 28SiMnB and 40SiMnVBE
40SiMnVBE steel 51CrMnV 52CrMnMoV 55SiCrV 55SiMnVB 60CrMnMo 880 C brine annealed Annex Austenite Auto-delivery bright steels brine quenching Buy True-PDF chemical composition cold-drawn continuous cooling transformation Cross-section shape Delivery condition demand parties Determination diameter Different steel products Dimensions in millimeters Elasticity modulus End hardenability H band hardenability band Hardness HRC heat treatment HH Max Hot rolled hot-rolled flat steels inspection leaf springs main usage Nominal dimension tolerances nonmetallic inclusions oil quenching order contract parties and indicated qualification level rectangle flat steel relevant specifications round steels shown in Table side length specific requirements specifications of GB/T specifications of Table spectrophotometric method GB/T spring flat steel spring steel steel and alloy steel are shown steel grades steel products GB/T steels GB/T steels shall comply supply and demand supply party Surface roughness Table A.1 temperature test method tolerance of hot-rolled ultrasonic testing valve springs weight and tolerance wire rods www.ChineseStandard.net