GB/T 3091-2008 Q235B welded steel pipes

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11-May-2024

Q235B welded steel pipes is an industrial steel pipe which under GB/T 3091-2008 standard, Q235B welded steel pipes’s surface can be painted black paint, varnish, antiseptic oil, galvanized or according to customer requirements, mainly used in low-pressure liquid, water, gas, oil, pipeline, construction, fence, Or wooden pallet packing, piping paint, end plastic cover or according to customer requirements.

GB/T 3091 Q235B welded steel pipes Chemical composition

chemical composition of Q235B
chemical composition of Q235B
Grade	Class	C	Mn	Si	S	P
Grade	Class			no more than
Q235	B	0.12-0.2	0.3-0.7	0.3	0.045	0.045

Q235B welded steel pipes Mechanical properties

mechanical property of Q235B

Grade	lowder yield		Tensile	Extensibility after
	strength Rel/N/MM^2		strength	fracture A/%
	no less than		R/N/MM^2	no less than
	t<=16mm	T>16mm	no less than	D<=168.3MM	D>168.3mm
Q235B	235	225	370	15	20

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