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Seamless Steel Pipe for vessels, equipment,

GB/T8162 – China National Standard
ASTM A53 – American Society for Testing and Materials Standard ASME SA53 – American Boiler and Pressure Vessel Code

Uses: for the manufacture of seamless pipes for pipes, containers, equipment, pipe fittings and mechanical structures

Mainly produced steel pipe grades: 10, 20, 35, 45, Q345, 15CrMo, 12Cr1MoV, A53A, A53B, SA53A, SA53B, etc.

Dimensional tolerances:

Steel pipe type	Outer diameter (D)		Steel pipe wall thickness (S)
Cold drawn tube	Steel pipe outer diameter (mm)	Allowable deviation (mm)	Steel pipe wall thickness (mm)	Allowable deviation (mm)
	>30～50	±0.3	≤30	±10%
	>50～219	±0.8%	≤30	±10%
Hot rolled tube	>219	±1.0%	>20	±10%

Mechanical properties:

standard	Brand	Tensile strength (MPa)	Yield strength (MPa)	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	View the table of ASTM A53 View the table of ASME SA53
ASTM A53 ASME SA53	B	≥415	≥240	View the table of ASTM A53 View the table of ASME SA53

chemical composition:

standard	Brand	chemical composition(%)
standard	Brand	C	Si	Mn	P	S	With	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 to 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
ASTMA53 ASMESA53	B	≤0.30	/	≤1.20	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08