ASTM A333 standard specifications

Feb 28, 2024

ASTM A333 standard specifications

ASTM A333 standard covers wall seamless and welded carbon and alloy steel pipe for use at low temperatures. ASTM A333 alloy pipe shall be manufactured using seamless or welding processes, with no filler metal added during the welding operation. All seamless and welded pipes shall be treated to control their microstructure. Tensile tests, impact tests, hydraulic tests, and non-destructive electrical tests should be carried out in accordance with specified requirements. Certain product sizes may not comply with this specification because thicker wall thicknesses can adversely affect low temperature impact properties.

ASTM A333 steel pipe production incorporates a series of visual surface imperfections to ensure it is manufactured correctly. ASTM A333 steel pipe shall be rejected if acceptable surface defects are not discrete but occur over a large area beyond what would be considered a skilled surface treatment. The finished tube should be fairly straight.

ASTM A333 Steel Pipe Surface Inspection Requirements
Surface defects that penetrate more than 12.5% of the nominal wall thickness or invade the minimum wall thickness shall be considered defects. ASTM A333 steel pipe with such defects should be given one of the following treatments:
If the remaining wall thickness is within specified limits, defects can be removed by grinding.
Repair according to repair welding regulations.
Defective pipe sections can be removed within the required length.
Defective pipes may be rejected.

ASTM A333 Steel Pipe Chemical Composition:

Standard	Grade	Chemical Composition (%)
Standard	Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Al
ASTM A333	Grade 1	≤0.30		0.40~1.06	≤0.025	≤0.025
	Grade 3	≤0.19	0.18~0.37	0.31~0.64	≤0.025	≤0.025		3.18~3.82
	Grade 4	≤0.12	0.18~0.37	0.50~1.05	≤0.025	≤0.025	0.44~1.01	0.47~0.98	0.40~0.75			0.04~0.30
	Grade 6	≤0.30	≥0.10	0.29~1.06	≤0.025	≤0.025
	Grade 7	≤0.19	0.13~0.32	≤0.90	≤0.025	≤0.025		2.03~2.57
	Grade 8	≤0.13	0.13~0.32	≤0.90	≤0.025	≤0.025		8.40~9.60
	Grade 9	≤0.20		0.40~1.06	≤0.025	≤0.025		1.60~2.24	0.75~1.25
	Grade 10	≤0.20	0.10~0.35	1.15~1.50	≤0.03	≤0.015	≤0.15	≤0.25	≤0.015	≤0.50	≤0.12	≤0.06
	Grade 11	≤0.10	≤0.35	≤0.6	≤0.025	≤0.025	≤0.50	35.0~37.0		≤0.50

ASTM A333 Steel Pipe Mechanical Property:

Standard	Grade	Tensile Strength (MPa)	Yield Point (MPa)	Elongation (%)
Standard	Grade	Tensile Strength (MPa)	Yield Point (MPa)	Y	X
ASTM A333	Grade 1	≥380	≥205	≥35	≥25
	Grade 3	≥450	≥240	≥30	≥20
	Grade 4	≥415	≥240	≥30	≥16.5
	Grade 6	≥415	≥240	≥30	≥16.5
	Grade 7	≥450	≥240	≥30	≥22
	Grade 8	≥690	≥515	≥22
	Grade 9	≥435	≥315	≥28
	Grade 10	≥550	≥450	≥22
	Grade 11	≥450	≥240	≥18

ASTM A333 Steel Pipe Strike temperature condition:

Grade	The lowest temperature for strike test
Grade	°F	°C
ASTM A333 Grade 1	-50	-45
ASTM A333 Grade 3	-150	-100
ASTM A333 Grade 4	-150	-100
ASTM A333 Grade 6	-50	-45
ASTM A333 Grade 7	-100	-75
ASTM A333 Grade 8	-320	-195
ASTM A333 Grade 9	-100	-75
ASTM A333 Grade 10	-75	-60