GB/T 33156 Q195 Precision Welded Tubes for Gas Spring, DIN 4550, EN 10305-2, Q195, Q215, Q235, Q275, Q345

GB/T 33156 Precision Welded Tubes for Gas Spring

Standard: GB/T 33156
Equivalent Standards: DIN 4550, EN 10305-2

Material: Q195
Equivalent Materials: CEW 2, RSt34-2, TS-30a

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %
0.15 max	0.35 max	0.70 max	0.025 max	0.025 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Delivery Condition
420 min	-	6 min	+C
370 min	-	10 min	+LC
370 min	260 min	18 min	+SR
290 min	-	28 min	+A
300-440	195 min	28 min	+N

GB/T 33156 specifies the classification, code, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of precision welded steel tubes for gas springs. GB/T 33156 is applicable to cold drawn or cold rolled precision welded steel tubes for gas springs (including seat pressure bars, lifters) in machinery manufacturing, vehicle manufacturing and furniture products.
GB/T 33156规定了气弹簧用精密焊接钢管的分类、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 33156适用于机械制造、车辆制造、家具制品中气弹簧（包括座椅气压棒、升降器）用冷拔或冷轧精密焊接钢管。

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.

Length: 5800mm; 6000mm; 10000mm; 11800mm; and so on.
Further process: cutting, deformation.

Keyword: precision steel tube, GB/T 33156, precision steel tube, high precision, cng tube, HPL Tube

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