This part of GB/T 33164 specifies the ordering content, dimensions, appearance, weight and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificate of hot-rolled spring flat steel for automotive suspension systems. This section applies to hot-rolled spring flat steel (hereinafter referred to as flat steel) for automotive suspension systems with a width not exceeding 160 mm and a thickness not exceeding 60 mm. 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 deviations in the chemical composition of finished products of steel GB/T 223.5 Determination of acid soluble silicon and total silicon content in steel GB/T 223.5 Reduced molybdosilicate spectrophotometric method GB/T 223.11 Determination of chromium content in steel and alloy Visual titration or potentiometric titration GB/T 223.13 Chemical analysis methods of steel and alloy Determination of vanadium content GB/T 223.19 Chemical analysis methods of steel and alloy Determination of copper content GB/T 223 . 23 Determination of nickel content in steel and alloys - Dimethylglyoxime spectrophotometric method GB/T 223.26 Determination of molybdenum content in steel and alloys - Thiocyanate spectrophotometric method GB/T 223.59 Determination of phosphorus content in steel and alloys - 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 - Perchlorate dehydration gravimetric method GB/T 223.64 Determination of manganese content in steel and alloys - Flame atomic absorption spectrometric method G B/T 223.72 Determination of sulfur content in steel and alloys Gravimetric method GB/T 223.75 Determination of boron content in steel and alloys Methanol distillation curcumin photometric method GB/T 223.76 Chemical analysis methods of steel and alloys Flame atomic absorption spectrometric method for the determination of vanadium content GB/T 223.86: Determination of total carbon content in steel and alloys Infrared absorption method after induction furnace combustion
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