Seamless Steel Pipe for Transmission of Fluids
Standard:
GB/T8163--------China national standard
Steel material:
10#, 20#, Q345B, etc
Dimension tolerance:
Type of pipe | Outer diameter | Walll thickness | ||
Hot rolled seamless pipe | OD (mm) | tollerance | WT (mm) | tolerance |
33.4~114.3 | ±1.5% | 2.77~12.7 | ±12% | |
114.3~219 | ±1.5% | 3.5~14 | ±12% | |
＞219 | ±1.0% | ＞20 | ±10% | |
Mechanical Properties:
Standard | Steel grade | Tensile strength (Mpa) | Bend strength (Mpa) | Elongation (%) |
GB/T8163 | 10# | 335~475 | ≥205 | ≥24 |
20# | 410~550 | ≥245 | ≥20 | |
Q345 | 490~665 | ≥325 | ≥21 |
Chemical Composition:
standard | Steel 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 | 0.12~0.2 | 0.2~0.55 | 1.27~1.6 | ≤0.045 | ≤0.045 | ||||
