Fluid-Conveying Seamless Tubes

Specification: GB/T8163, ASTM A53, ASTM A106
Materials: 10#, 20#, Q345, A106GR.B, A53GR.B,
Application: This series of seamless tube is used to transport oil, natural gas, and other fluids.

Chemical Composition
Specification 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 / / /
Specification Grade Tensile Strength (MPa) Yield Strength (MPa) Percentage Elongation (%)
GB/T8163 10 335 ~475 ≥205 ≥24
20 410 ~550 ≥245 ≥20
Q345 490 ~665 ≥325 ≥21
Steel Pipe Types Outside Diameter (D) Wall Thickness (S)
Cold-Drawn Pipe Outside Diameter (mm) Diameter Tolerance(mm) Wall Thickness (mm) Thickness Tolerance (mm)
>30 ~50 ±0.3 ≤30 ±10 %
>50 ~219 ±0.8 %
Hot-Rolled Pipe >219 ±1.0 % >20 ±10 %
Standard Grade Chemical Composition Mechanical Properties
C Si Mn P S Cr Ni Cu V Tensile Strength (Mpa) Yield Strength (Mpa)
ASTM A106 A ≤ 0.25 ≤ 0.10 0.27- 0.93 ≤ 0.035 ≤ 0.40 ≤ 0.15 ≤ 0.40 ≤ 0.40 ≤ 0.08 ≥330 ≥205
B ≤ 0.30 ≤ 0.10 0.29- 1.06 ≤0.035 ≤ 0.40 ≤ 0.15 ≤ 0.40 ≤ 0.40 ≤ 0.08 ≥415 ≥240
C ≤ 0.35 ≤ 0.10 0.29- 1.06 ≤ 0.035 ≤ 0.40 ≤ 0.15 ≤ 0.40 ≤ 0.40 ≤ 0.08 ≥485 ≥275
Standard Grade Chemical Composition (%) Mechanical Properties
C Si Mn P S Cu Ni Mo Cr V Tensile Strength (Mpa) Yield Strength (Mpa)
ASTM A53 A ≤ 0.25 / ≤ 0.95 ≤ 0.05 ≤ 0.045 ≤ 0.40 ≤ 0.40 ≤ 0.15 ≤ 0.40 ≤ 0.08 ≥330 ≥205
B ≤ 0.30 / ≤ 0.05 ≤0.05 ≤ 0.045 ≤ 0.40 ≤ 0.40 ≤ 0.15 ≤ 0.40 ≤ 0.08 ≥415 ≥240