This part of GB/T 33164 specifies the ordering content, dimensions, appearance, weight, technical requirements, test methods, inspection rules, packaging, identification, and quality certificate requirements for coil springs, torsion bars, and stabilizer bars used in automotive suspension systems. This section applies to hot-rolled round steel with a nominal diameter not exceeding 80 mm and hot-rolled wire rods with a nominal diameter not exceeding 40 mm (hereinafter referred to as steel). The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 222 Permissible Deviation in Chemical Composition of Finished Products of Steel GB/T 223.11 Determination of Chromium Content in Steel and Alloy GB/T 223.13 Methods for Chemical Analysis of Steel and Alloy GB/T 223.13 Ammonium Ferrous Sulfate Volumetric Method for Determination of Vanadium Content GB/T 223.19: Methods for Chemical Analysis of Steel and Alloy GB/T 223.23 Determination of Nickel Content in Steel and Alloy GB/T 223.26 Dimethylglyoxime spectrophotometric Method Determination of gold and molybdenum content - Thiocyanate spectrophotometric method GB/T 223.59 Steel and alloys - Determination of phosphorus content, bismuth phosphorus molybdenum blue spectrophotometric method and antimony phosphorus molybdenum blue spectrophotometric method GB/T 223.60 Chemical analysis methods of steel and alloys - Determination of silicon content by perchloric acid dehydration gravimetric method GB/T 223.64 Determination of manganese content in steel and alloys - Flame atomic absorption spectrometric method GB/T 223.72 Determination of sulfur content in steel and alloys - Gravimetric method GB/T 223.82 Determination of hydrogen content in steel Inert gas pulse melting thermal conductivity method GB/T 223.86 Determination of total carbon content in steel and alloys - Infrared absorption method after induction furnace combustion GB/T 224 Determination of depth of decarburization layer in steel GB/T 225 End quenching test method for hardenability of steel (Jominy test) GB/T 226 Method for acid corrosion inspection of microstructure and defects in steel
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