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ASME SA333/SA333M

Seamless and Welded Steel Pipe for Low-Temperature Service.

This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their microstructure. Tensile tests, impact tests, hydrostatic tests, and nondestructive electric tests shall be made in accordance to specified requirements.

Size (mm):

Outer Dimensions: 19.05mm ~ 114.3mm

Wall Thickness:2.0mm ~ 14 mm

Length: max 16000mm

Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Chemical Composition

Grade	Chemical Composition (%)
Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Al
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

Mechanical requiremnts

Grade	Tensile Strength (MPa）	Yield Point (MPa)	Elongation (%)
Grade	Tensile Strength (MPa）	Yield Point (MPa)	Y	X
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

Strike temperature condition

Crade	The lowest temperature for strike test
Crade	℉	℃
ASME SA333/SA333M Grade 1	-50	-45
ASME SA333/SA333M Grade 3	-150	-100
ASME SA333/SA333M Grade 4	-150	-100
ASME SA333/SA333M Grade 6	-50	-45
ASME SA333/SA333M Grade 7	-100	-75
ASME SA333/SA333M Grade 8	-320	-195
ASME SA333/SA333M Grade 9	-100	-75
ASME SA333/SA333M Grade 10	-75	-60

ASME SA335/SA335M

ASME SA312/SA312M

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