ChinaAutoRegs\uff5cGB\/T 3639-2009 \u82f1\u6587\u7248\/English\/\u7ffb\u8bd1\/\u51b7\u62d4\u6216\u51b7\u8f67\u7cbe\u5bc6\u65e0\u7f1d\u94a2\u7ba1
\nSeamless Cold-Drawn or Cold-Rolled Steel Tubes for Precision Applications<\/p>\n
\n1 SCOPE<\/p>\n
This standard specifies the classification, code name, size, appearance, weight, allowable deviation, technical requirements, test methods, inspection rules, packing, marking and quality certificate of the seamless cold-drawn or cold-rolled steel tubes for precision applications.
\nThis standard is applicable to the machine building structure, hydraulic equipment, automobile parts and other seamless cold-drawn or cold-rolled steel tubes for precision applications with special measurements size precision and high surface quality requirements.<\/p>\n
2 NORMATIVE REFERENCES<\/p>\n
The following Standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments (corrigenda excluded) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. For undated references, the latest edition of the normative documents referred to applies.<\/p>\n
GB\/T 222 Permissible tolerances for chemical composition of steel products
\nGB\/T 223.5 Steel and iron – Determination of acid-soluble silicon and total silicon content – Reduced molybdosilicate spectrophotometric method (GB\/T 223.5-2008, ISO 4829-1:1986 ISO 4829-2:1988, MOD)
\nGB\/T 223.12 Methods for chemical analysis of iron, steel and alloy The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
\nGB\/T 223.23 Iron steel and alloy – Determination of nickel content – The dimethylglyoxime spectrophotometric method
\nGB\/T 223.26 Iron steel and alloy – Determination of molybdenum content – The thiocyanate spectrophotometric method
\nGB 223.53 Methods for chemical analysis of iron, steel and alloy — The flame atomic absorption spectrophotometric method for the determination of copper content
\nGB\/T 223.59 Iron steel and alloy – Determination of phosphorus content – Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
\nGB 223.63 Methods for chemical analysis of iron, steel and alloy — The sodium (potassium) periodate photometric method for the determination of manganese content
\nGB\/T 223.68 Methods for chemical analysis of iron, steel and alloy — The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
\nGB\/T 223.69 Iron steel and alloy – Determination of carbon contents — Gas-volumetric method after combustion in the pipe furnace
\nGB\/T 228 Metallic materials–Tensile testing at ambient temperature (GB\/T 228-2002, eqv ISO 6892:1998)
\nGB\/T 242 Metal materials-Tube-Drift-expending test (GB\/T 242-2007, ISO 8493:1998 IDT)
\nGB\/T 246 Metal materials-Tube-Flattening test (GB\/T 246-2007, ISO 8492:1998, IDT)
\nGB\/T 699 Quality carbon structural steels
\nGB\/T 1031 Surface roughness parameters and their values
\nGB\/T 1591 High strength low alloy structural steels<\/p>\n
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