GB/T8163 Q345 seamless steel pipe GB/T8163 Q345 seamless pipe Q345 is a steel grade of GB/T8163 standard, GB/T81630 Q345 seamless pipes for conveying water, oil, gas and other fluids. Standard: GB/T8163Seamless steel pipe for conveying flui
GB/T8163 Q345 seamless steel pipe
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 |
Q345 |
0.12~0.20 |
0.20~0.55 |
1.20~1.60 |
≤0.045 |
≤0.045 |
/ |
/ |
/ |
Standard |
Grade |
Tensile strength (MPa) |
Yield strength (MPa) |
Elongation(%) |
GB/T8163 |
Q345 |
490~665 |
≥325 |
≥21 |
Weight calculation formula: [(outer diameter - wall thickness) * wall thickness] * 0.02466
Steel pipe production process: hot rolling, hot expansion, cold drawing
Product key description, this is a very good product description, detailing our product use, product characteristics