Cutting Edge A335 Seamless Steel Pipe

The ASTM A335 steel pipe may undergo hot finishing or cold drawing and is then subjected to the following finishing heat treatment. This specification encompasses seamless pipes made of “chrome-molybdenum” with outstanding corrosion resistance and high-temperature tensile strength.

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A335 Seamless Steel Pipe description

ASTM A335 Pipe is a seamless ferritic alloy-steel pipe designed for high-temperature service. Pipes meeting this specification are suitable for bending, flanging, and similar forming operations, as well as for fusion welding. Typically, ASTM A335 P11, P22, and P91 pipelines are utilized in power generation and downstream oil and gas applications, while P5 and P9 grades are employed in refinery applications. A335 steel pipe not only exhibits high oxidation resistance and resistance to high-temperature steam corrosion, but also possesses good impact toughness, stable durable plasticity, and thermal strength. These pipes are commonly used for transporting high-temperature and high-pressure oil, natural gas, and other media.

Product Parameters

Outer Diameter	Outer Diameter
Seamless: 1/4"-36"	Seamless: 1/4"-36"
Welding: 21.3mm-3620mm Round Tube: 1/2"-10"	Welding: 21.3mm-3620mm	Welding: 21.3mm-3620mm
	Round Tube: 1/2"-10"	Round Tube: 1/2"-10"
Square Tube/Rectangular Tube: 15x15mm-400x600mm	Square Tube/Rectangular Tube: 15x15mm-400x600mm	Square Tube/Rectangular Tube: 15x15mm-400x600mm
Wall Thickness	Wall Thickness
Seamless: 1.25mm-50mm	Seamless: 1.25mm-50mm
Welding: 1.65mm-65mm	Welding: 1.65mm-65mm
Length	Length
Scope of Application	The specification encompasses seamless pipes made of “chrome-molybdenum” with exceptional corrosion resistance and high-temperature tensile strength. Typically, ASTM A335 P11, P22, and P91 pipelines are utilized in power generation and downstream oil and gas applications, while P5 and P9 grades are employed in refinery applications.

Chemical Composition

A335	UNS	C≤	Mn	P≤	S≤	Si≤	Cr	Mo
P1	K11522	0.10~0.20	0.30~0.80	0.025	0.025	0.10~0.50	-	0.44~0.65
P2	K11547	0.10~0.20	0.30~0.61	0.025	0.025	0.10~0.30	0.50~0.81	0.44~0.65
P5	K41545	0.15	0.30~0.60	0.025	0.025	0.5	4.00~6.00	0.44~0.65
P5b	K51545	0.15	0.30~0.60	0.025	0.025	1.00~2.00	4.00~6.00	0.44~0.65
P5c	K41245	0.12	0.30~0.60	0.025	0.025	0.5	4.00~6.00	0.44~0.65
P9	S50400	0.15	0.30~0.60	0.025	0.025	0.50~1.00	8.00~10.00	0.44~0.65
P11	K11597	0.05~0.15	0.30~0.61	0.025	0.025	0.50~1.00	1.00~1.50	0.44~0.65
P12	K11562	0.05~0.15	0.30~0.60	0.025	0.025	0.5	0.80~1.25	0.44~0.65
P15	K11578	0.05~0.15	0.30~0.60	0.025	0.025	1.15~1.65	-	0.44~0.65
P21	K31545	0.05~0.15	0.30~0.60	0.025	0.025	0.5	2.65~3.35	0.80~1.60
P22	K21590	0.05~0.15	0.30~0.60	0.025	0.025	0.5	1.90~2.60	0.87~1.13
P91	K91560	0.08~0.12	0.30~0.60	0.02	0.01	0.20~0.50	8.00~9.50	0.85~1.05
P92	K92460	0.07~0.13	0.30~0.60	0.02	0.01	0.5	8.50~9.50	0.30~0.60

Mechanical Properties

A335	UNS	Yield Strength Ksi	Tensile Strength Ksi	Elongation %
P1	K11522	30	55	30
P2	K11547	30	55	30
P5	K41545	40	70	30
P9	S50400	30	60	30
P11	K11597	30	60	20
P12	K11562	32	60	30
P22	K21590	30	60	30
P91	K91560	60	85	20