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GB/T 3091-2008 Q195B welded steel pipes

GB/T 3091-2008 Q195B welded steel pipes include of 0.060-0.12 carbon content, Q195B welded steel pipes’s surface exposed, galvanized, paint, color paint, 3PE,or other anti-corrosion treatment, used in scaffolding pipe, structural pipe, fence / door pipe, oil pipe, water oil or natural gas low pressure fluid pipe , The greenhouse tube, agricultural pipe, pipe equipment, etc., acceptable chemical composition and mechanical properties testing; hydrostatic pressure test, size and visual inspection, and non-destructive testing and other tests.

GB/T 3091-2008 Q195B welded steel pipes

Q195B welded steel pipe Chemical composition

chemical composition of Q195B

Grade

Class

C

Mn

Si

S

P

 

 

no more than

Q195B

....

0.06-0.12

0.25-0.5

0.3

0.05

0.045

GB/T 3091-2008 Q195B welded steel pipes Mechanical properties

mechanical property of Q195B  

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

Q195B

195

185

315

15

20

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