GB/T 8163 20# steel pipe (fluid pipe) is a kind of pipe with hollow section and no weld from the beginning to the end. GB/T 8163 20# steel pipe has hollow section, which is widely used as the pipe for transporting oil, natural gas, gas, water and some solid materials. GB/T 8163 20# steel pipe is a seamless steel pipe for fluid transportation (GB/T 8163-2018), which is a general seamless steel pipe used to transport water, oil, gas and other fluids.
GB/T 8163 20# steel pipe chemical composition
| Grade |
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Cu |
|
GB/T 8163 20# |
0.17-0.2 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.25 |
≤0.25 |
GB/T 8163 20# steel pip mechanical properties
| Grade |
Tensile strength |
Yield strength |
Elongation % |
Sectional shrinkage |
Hardness |
|
GB/T 8163 20# |
410 |
245 |
25 |
5 |
156HB |
The material of GB/T 8163 20# steel pipe is 20# steel, with strength slightly higher than 15 × steel, little quenching and no tempering brittleness. Cold deformation, high plasticity, generally used for bending, rolling, bending, hammer arch and other processing, GB/T 8163 20# steel pipe arc welding and contact welding performance is good, gas welding thickness is small, the shape of strict or complex parts prone to cracks. The cold drawing or normalizing state of the cutting process is better than the annealing state. GB/T 8163 20# steel pipe is generally used to manufacture workpieces with small force and toughness.
