GB/T 8162 grade 10# seamless steel tubes for structural purposes

Standard: GB/T 8162

GB/T 8162 grade 10# seamless steel tubes are for application of mechanical structure and general engineering structures. The length of GB/T 8162 grade 10# seamless steel tubes is usually within range of 3000-12000mm. Other length sizes are also available.

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GB/T 8162 standard specifies the ordering content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of grade 10# structure steel tubes.

GB/T 8162 grade 10# seamless steel tubes chemical composition:

C, %	Mn, %	Si, %	P, %	S, %	Cr, %	Ni, %	Cu, %
0.07-0.13	0.35-0.65	0.17-0.37	0.035 max	0.035 max	0.15 max	0.30 max	0.25 max

GB/T 8162 grade 10# seamless steel tubes mechanical properties:

Tensile Strength	Yield Strength			Elongation
Tensile Strength	WT≤16mm	16<WT≤30mm	WT>30mm	Elongation
≥335MPa	≥205MPa	≥195MPa	≥185MPa	≥24%

Wall thickness tolerance of GB/T 8162 seamless steel tubes:

Hot rolled	Outside Diameter, mm	Tolerance
	OD≤102	±12.5%WT or ±0.40mm, choose the larger
	OD>102, WT/OD≤0.05	±15%WT or ±0.40mm, choose the larger
	OD>102, 0.05<WT/OD≤0.10	±12.5%WT or ±0.40mm, choose the larger
	OD>102, WT/OD>0.10	+12.5%WT, -10%WT
Hot expanded	±15%WT
Cold Drawn (Cold rolled)	Wall thickness, mm	Tolerance
	WT≤3	+15%/-10%WT or ±0.15mm,choose the larger
	WT>3-10	+12.5%WT, -10%WT
	WT>10	±10%WT

After negotiation between the GB/T 8162 grade 10# seamless steel tubes supplier and buyer, the wall thickness tolerance beyond above range can also be available.

Flattening test shall be conducted for GB/T 8162 grade 10# seamless steel tubes with nominal outer diameter > 22mm-600mm and ratio of wall thickness to outer diameter no more than 10%.

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