Seamless Structural Tubing

Specifications: GB/T8162, ASTM A53, ASME SA53 (American Boiler and Pressure Vessel Code)
Materials: 10#, 20#, 45#, 27SiMn, Q345, A53A/B, 15CrMo, 12Cr1MoV, SA53A, SA53B
Application: The structural seamless steel tube is mainly used for the construction of vessels, pipeline, equipment, fittings, and other mechanical structures.

Chemical Composition
Specification Grade Chemical Composition (%)
C Si Mn P S Cu Ni Mo Cr V
GB/T8162 10 0.07 ~0.14 0.17 ~0.37 0.35 ~0.65 ≤0.035 ≤0.035 ≤0.25 ≤0.25 / ≤0.15 /
20 0.17 ~0.24 0.17 ~0.37 0.35 ~0.65 ≤0.035 ≤0.035 ≤0.25 ≤0.25 / ≤0.25 /
35 0.32 ~0.40 0.17 ~0.37 0.50 ~0.80 ≤0.035 ≤0.035 ≤0.25 ≤0.25 / ≤0.25 /
45 0.42 ~0.50 0.17 ~0.37 0.50 ~0.80 ≤0.035 ≤0.035 ≤0.25 ≤0.25 / ≤0.25 /
Q345 0.12 ~0.20 0.20 ~0.55 1.20 ~1.60 ≤0.035 ≤0.035 ≤0.25 ≤0.25 / ≤0.25 /
15CrMo 0.12 ~0.18 0.17 ~0.37 0.40 ~0.70 ≤0.035 ≤0.035 ≤0.25 ≤0.30 0.40 ~0.55 0.80 ~1.10 /
12Cr1MoV 0.08 ~0.15 0.17 ~0.37 0.40 ~0.70 ≤0.035 ≤0.035 ≤0.25 ≤0.30 0.25 ~0.35 0.90 ~1.20 0.15 ~0.30
ASTMA53 ASMESA53 A ≤0.25 / ≤0.95 ≤0.05 ≤0.06 ≤0.40 ≤0.40 ≤0.15 ≤0.40 ≤0.08
B ≤0.30 / ≤1.20 ≤0.05 ≤0.06 ≤0.40 ≤0.40 ≤0.15 ≤0.40 ≤0.08
Mechanical Properties
Specification Grade Tensile Strength (MPa) Yield Strength (MPa) Percentage Elongation (%)
GB/T8162 10 ≥335 ≥205 ≥24
20 ≥390 ≥245 ≥20
35 ≥510 ≥305 ≥17
45 ≥590 ≥335 ≥14
Q345 ≥490 ≥325 ≥21
15CrMo ≥440 ≥295 ≥22
12Cr1MoV ≥490 ≥245 ≥22
ASTM A53 ASME SA53 A ≥330 ≥205 Refer to the ASTM A53 Chart Refer to the ASME SA53 Chart
B ≥415 ≥240
Steel Tube Types Outside Diameter (D) Wall Thickness of Steel Pipe (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%