GB/T 33975-2017: Translated English of Chinese Standard. (GBT 33975-2017, GB/T33975-2017, GBT33975-2017): Hot-rolled spring steel wire rod for high-speed railway fastener
https://www.chinesestandard.net, 2018年9月23日 - 10 頁
This Standard specifies the ordering content, dimension, shape, weight and tolerances, technical requirements, test methods, inspection rules, packaging, marking and quality certification of hot-rolled spring steel wire rod for high-speed railway fastener, This Standard applies to hot-rolled spring steel wire rod for high-speed railway fastener with a nominal diameter of 12 mm ~ 20 mm. This standard can be used as a reference for ordinary railways and heavy-load railways.
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Packaging marking and quality certification
accuracy grade acid leaching macrostructure analysis of iron batch different steel blue spectrophotometric method chemical analysis chemical composition complete decarburization composition by smelting Conformity level content GB/T Depth of decarburization Designation and chemical Determination of chromium different steel wire dimension extraction photometric method free from shrinkage Grain size high-speed railway fastener hot-rolled spring steel inspection and acceptance Jiangsu lateral acid leaching layers and inclusions macrostructure and defect macrostructure of steel method after combustion Methods for chemical nonmetallic inclusions Ordering content percentage reduction phosphomolybdate blue spectrophotometric pipe furnace porosity Central reduction of area rod for high-speed sample numbers sampling methods series Fine series series Thick series shrinkage cavities smelting analysis specified in GB/T specified in Table spectrophotometric method GB/T spring steel wire Standard diagrams steel and alloy steel wire rod steels GB/T strength and percentage Tensile strength Tensile test Test item test methods Thick series Thick weight and tolerances wire rods GB/T