ASTM A335 Seamless Alloy Steel Pipe for High-Temperature

ASTM A335 Seamless Alloy Steel Pipe for High-Temperature

The ASTM A335 Seamless Alloy Steel Pipe is specifically designed for high-temperature service. This specification by the American Society for Testing and Materials (ASTM) encompasses a range of seamless ferritic alloy-steel pipes that are ideal for high-temperature applications. The pipes are engineered to withstand extreme conditions, making them suitable for power plants, refineries, and petrochemical facilities. With superior mechanical properties and a robust chemical composition, ASTM A335 pipes ensure optimal performance under high-stress environments. Available in various grades such as P5, P9, P11, P22, and P91, these pipes offer versatility and reliability for demanding industrial applications. Whether used in boiler systems, heat exchangers, or other high-temperature equipment, ASTM A335 Seamless Alloy Steel Pipes deliver exceptional durability and performance, ensuring long-lasting and efficient operation.

Chemical Composition of ASTM A335/ASME SA335 Alloy Seamless Steel Pipe

Grade	UNS No.	C	Mn	P max	S max	Si	Cr	Mo	Others
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 max	0.30-0.60	0.025	0.025	0.50 max	4.00-6.00	0.45-0.65	－
P5b	K51545	0.15 max	0.30-0.60	0.025	0.025	1.00-2.00	4.00-6.00	0.45-0.65	－
P5c	K41245	0.12 max	0.30-0.60	0.025	0.025	0.50 max	4.00-6.00	0.45-0.65	－
P9	S50400	0.15 max	0.30-0.60	0.025	0.025	0.25-1.00	8.00-10.00	0.90-1.10	－
P11	K11597	0.05-0.15	0.30-0.60	0.025	0.025	0.50-1.00	1.00-1.50	0.44-0.65	－
P12	K11562	0.05-0.15	0.30-0.61	0.025	0.025	0.50 max	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	0.50 max	2.65-3.35	0.80-1.06	－
P22	K21590	0.05-0.15	0.30-0.60	0.025	0.025	0.50 max	1.90-2.60	0.87-1.13	－
P23	K41650	0.04-0.10	0.10-0.60	0.030  max	0.010 max	0.50 max	1.90-2.60	0.05-0.30	V 0.20-0.30	Cb 0.02-0.08
									B 0.0010-0.006	N 0.0015 max
									Al 0.030 max	W 1.45-1.75
									Ni 0.40 max	Ti 0.005-0.060
									Ti/N ≥3.5	－
P36	K21001	0.10-0.17	0.80-10.20	0.030 max	0.025 max	0.25-0.50	0.30 max	0.25-0.50	Ni 1.00-1.30	Cu 0.50-0.80
									Cb 0.015-0.045	V 0.02 max
									N 0.02 max	Al 0.050 max
P91	K91560	0.08-0.12	0.30-0.60	0.020	0.010	0.20-0.50	8.00-8.50	0.85-1.05	V 0.18-0.25	N 0.030-0.070
									Ni 0.40 max	Al 0.02 max
									Cb 0.06-0.10	Ti 0.01 max
									Zr 0.01 max	－
P92	K92460	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 0.40max	Al 0.02 max
									Cb 0.04-0.09	W 1.50-2.00
									B 0.001-0.006	Ti 0.01 max
									Zr 0.01 max	－
P122	K92930	0.07-0.14	0.70 max	0.020	0.010	0.50 max	10.00-11.50	0.25-0.60	V 0.15-0.30	W 1.50-2.50
									Cu 0.30-1.70	Cb 0.04-0.10
									B 0.0005-0.005	N 0.040-0.100
									Ni 0.50 max	Al 0.020 max
									Ti 0.01 max	Zr 0.01 max
P911	K91061	0.09-0.13	0.30-0.60	0.020 max	0.010 max	0.10-0.50	8.5-9.5	0.90-1.10	V 0.18-0.25	Ni 0.40 max
									Cb 0.060-0.10	B 0.0003-0.006
									N 0.04-0.09	Al 0.02 max
									W 0.90-1.10 Ti	0.01 max
									Zr 0.01 max	－

Mechanical Properties of ASTM A335/ASME SA335 Alloy Seamless Steel Pipe

Grade	P1,P2	P12	P23	P91	P92,P911,P36 class1	P122	P36 class2	All others
Tensile strength ≥ ksi(MPa)	55(380)	60(415)	74(510)	85(585)	90(620)	90(620)	95.5(660)	60(415)
Yield strength  ≥ksi(MPa)	30(205)	32(220)	58(400)	60(415)	64(440)	64(440)	66.5(460)	30(205)

Specifications

Standard	ASTM A335/ASME SA335 Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
Steel Grade	P1,P2,P5,P5b,P5c,P9,P11,P12,P15,P21,P22,P23,P36,P91,P92,P122,P911
Ends design	1) Bevel the welding ends to an angle of 30°, +5°, -0°, with a root face of 1/16″, +/- 1/32″. The bevel shall form a V groove with an included angle of 60°+10/-0. The root opening shall be 1/16″, +/- 1/32″ according to ANSI B16.25. 2) Plain or straight ends.
Outer Diameter(OD)	21.3-1067mm
Wall Thickness(WT)	2-150mm
Length	5.8-16m or OEM
Packing	Bare surface, hexagonal bundled with steel strips if the pipe diameter=323.9mm, loose packing if the pipe diameter is larger than 323.9mm.
Section Shape	Round
Technique	Seamless hot rolled or cold drawn
Place of Origin	Made in China
MOQ	Depends on order quantity
Transportation	Land transportation by truck or train, sea transportation by container ship or bulk ship.

Applications of ASTM A335 Alloy Steel Pipe

ASTM A335 specifies seamless ferritic alloy-steel pipe for high-temperature service. These pipes are used in various industries where high-temperature resistance and durability are critical. Below are the primary applications of ASTM A335 alloy steel pipes:

Power Generation
Boilers: Used in high-temperature boilers where pipes must withstand extreme heat and pressure.
Superheaters: Employed in superheater units of power plants to withstand high temperatures and prevent deformation.
Heat Exchangers: Utilized in heat exchangers within power plants to ensure efficient heat transfer at high temperatures.

Petrochemical Industry
Refinery Piping: Used in refineries where high-temperature processing of crude oil and other hydrocarbons occurs.
Chemical Processing: Employed in chemical processing plants where high temperatures are required for various chemical reactions.
Furnaces and Reactors: Suitable for piping systems in furnaces and reactors due to their ability to withstand high thermal stress.

Oil and Gas Industry
Steam Lines: Used in steam lines for enhanced oil recovery processes where high-temperature steam is injected into wells.
High-Temperature Processing: Employed in high-temperature processing units within oil and gas facilities.
Offshore Platforms: Suitable for offshore drilling platforms where high-temperature service is required for processing hydrocarbons.

Industrial Applications
Heat Treatment Plants: Used in heat treatment facilities for processes such as annealing, quenching, and tempering.
High-Temperature Kilns: Employed in kilns and furnaces where pipes must withstand continuous high temperatures.
Incinerators: Suitable for piping systems in industrial incinerators due to their high heat resistance.

Aerospace Industry
High-Temperature Exhaust Systems: Used in exhaust systems of aerospace engines where high-temperature gases are expelled.
Engine Components: Employed in manufacturing various engine components that require high-temperature resistance.

Automotive Industry
Turbocharger Systems: Used in turbocharger systems where high-temperature exhaust gases are handled.
Exhaust Manifolds: Suitable for exhaust manifolds in high-performance vehicles.

Nuclear Industry
Nuclear Power Plants: Used in nuclear power plants for high-temperature and high-pressure piping systems.
Nuclear Reactors: Employed in reactor components where high-temperature materials are essential.

Cement Industry
Kiln Shells and Piping: Used in cement kilns and related high-temperature piping systems.
Clinker Coolers: Employed in clinker coolers where high-temperature resistance is required.