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GB/T 31315 Cold Drawn or Cold Rolled Precision Weld Steel Tubes for Mechanical Structures |
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| Standard: GB/T 31315 Equivalent Standards: EN 10305-2 |
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| Material: Q195 Equivalent Materials: CEW 2, RSt34-2, TS-30a |
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| Chemistry Composition | |||||||||||||||||||||||||
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| Mechanical Properties | |||||||||||||||||||||||||
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| GB/T 31315 specifies the classification, code, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of cold drawn or cold rolled welded steel tubes for automobiles and machinery. GB/T 31315 is applicable to cold drawn or cold rolled welded steel tubes with special dimensional accuracy and high surface quality requirements used in machinery manufacturing, vehicle manufacturing, furniture products and general engineering industries. GB/T 31315规定了汽车和机械用冷拔或冷轧焊接钢管的分类、代号、尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 31315适用于机械制造、车辆制造、家具制品和一般工程行业所使用的具有特殊尺寸精度和高表面质量要求的冷拔或冷轧焊接钢管。 |
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| Manufacture: the tubes shall be manufactured from electric welded pre-tubes by cold drawing or other suitable processes. The tubes shall not include welds used for joining lengths of flat rolled strip prior to forming the pre-tube. Delivery Condition: cold drawn (hard) as +C, cold drawn (soft) as +LC, cold drawn and stress relieved as +SR, annealed as +A, normalized as +N. Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, NDT, surface inspection and dimension check. |
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| Length: 5800mm; 6000mm; 10000mm; 11800mm; and so on. Further process: cutting, deformation. |
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| Keyword: precision steel tube, GB/T 31315, precision steel tube, high precision, cng tube, HPL Tube | |||||||||||||||||||||||||
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