seamless steel pipe steel pipe pipe

good quality best service,reasonable price






cold drown
OD(mm)
Allowable deviation
(mm)
Wall thickness(mm)
Allowable deviation
(mm)





30~50
±0.3
30
±10%





50~219
±0.8%





hot rolled
219
±1.0%
20
±10%



































Mechanical Propert

















standard
grade
Tensile strength
(MPa)
Yield strength(MPa)
Elongation(%)





GB/T8163
10
335~475
205
24





20
410~550
245
20





Q345
490~665
325
21















Chemical composition


















standard
grade
Chemical Composition(%)
C
Si
Mn
P
S
Cr
Ni
Cu
GB/T8163
10
0.07~0.14
0.17~0.37
0.35~0.65
0.035
0.035
0.15
0.25
0.25
20
0.17~0.24
0.17~0.37
0.35~0.65
0.035
0.035
0.25
0.25
0.25
Q345
0.12~0.20
0.20~0.55
1.20~1.60
0.045
0.045
/
/
/