ASTM A335 alloy pipe

ASTM A335 seamless ferritic alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Grade P2 and P12 steel pipes shall be made by coarse-grain melting practice.

Our products for ASTM A335 alloy steel pipes have been listed as follows:

ASTM A335 P11 alloy steel pipe

ASTM A335 P91 Alloy Seamless Steel Pipe

ASTM A335 Grade P22 Alloy pipes

ASTM A335 P5 Alloy Seamless Steel Pipes

ASTM A335 P9 Alloy Steel Pipes

ASTM A335 P92 Alloy Seamless Steel Pipe

The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.

Mainly Grade of ASTM A335：

ASTM A335 P11, ASTM A335 P22, ASTM A335 P5, ASTM A335 P9, ASTM A335 P91, ASTM A335 P92

Chemical Composition (%) for the main grade

Grade	C	Mn	P, S, max	Si	Cr	Mo
P11	0.05-0.15	0.30-0.60	0.025	0.50-1.00	1.00-1.50	0.44-0.65
P22	0.05-0.15	0.30-0.60	0.025	0.50 max	1.90-2.60	0.87-1.13
P5	0.15 max	0.30-0.60	0.025	0.50 max	4.00-6.00	0.45-0.65
P9	0.15 max	0.30-0.60	0.025	0.25-1.00	8.00-10.00	0.90-1.10
P91	0.08-0.12	0.30-0.60	0.020/0.010	0.20-0.50	8.00-9.50	0.85-1.05
V 0.18-0.25	N 0.03-0.07	Ni 0.40 max	Al 0.02 max	Nb 0.06-0.10	Ti 0.01 max
P92	0.07-0.13	0.30-0.60	0.020/0.010	0.50 max	8.50-9.50	0.30-0.60
V 0.15-0.25	N 0.03-0.07	Ni 0.40 max	Al 0.02 max	Nb 0.04-0.09	W 1.50-2.00
B 0.001-0.006	Ti 0.01 max	Zr 0.01 max

Mechanical Properties

Grade P11, P22, P5, P9	Grade P91	Grade P92
Tensile strength, min, (MPa)	415	585	620
Yield strength, min, (MPa)	205	415	440
Elongation, min, (%), L/T	30/20	20/…	20/…

Heat Treatment

A / N+T

N+T / Q+T

N+T

Material & Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

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