GB/T8163 20# seamless steel pipe GB/T8163 20# seamless pipe 20# is a steel grade of GB/T8163 standard, GB/T81630 20# seamless pipe is a seamless steel pipe for fluid transportation (GB/T8163-2008), which is a general seamless steel pipe for
GB/T8163 20# seamless steel pipe
Weight calculation formula: [(outer diameter - wall thickness) * wall thickness] * 0.02466
|
Steel pipe type |
Outer diameter(OD) |
Wall thickness(WT) |
||
|
Cold drawn tube |
outer diameter (mm) |
Tolerance |
wall thickness (mm) |
Tolerance |
|
＞30～50 |
±0.3 |
≤30 |
±10％ |
|
|
＞50～219 |
±0.8％ |
|||
|
Hot rolled tube |
＞219 |
±1.0％ |
＞20 |
±10％ |
|
Standard |
Grade |
chemical composition % |
|||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
||
|
GB/T8163 |
20 |
0.17～0.24 |
0.17～0.37 |
0.35～0.65 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.25 |
≤0.25 |
|
Standard |
Grade |
Tensile strength (MPa) |
Yield strength (MPa) |
Elongation(%) |
|
GB/T8163 |
20 |
410～550 |
≥245 |
≥20 |
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