ASTM A335 P91 Seamless Pipe plays a vital role in various industries as part of the A335 specification. These pipes, known as ASME SA 335 Grade P91 Alloy Steel Pipes, are crafted from a unique chromium-molybdenum alloy composition, incorporating 1% molybdenum, 9% chromium, and additional elements like nickel, manganese, silicon, and carbon.

ASTM A335 P91 Pipe mechanical properties, including impressive tensile strength, yield strength, and resistance to impact, corrosion cracking, and oxidation, are direct results of this composition.

To further enhance their strength, P91 steel pipes can undergo specific production methods like normalization and tempering or quenching and tempering. Produced through a seamless manufacturing process, these pipes boast precise dimensions, crucial for applications requiring high precision.

Industries such as petrochemicals, oil and gas, power generation, and refineries heavily rely on A335 P91 alloy pipes, especially in environments characterized by extreme temperatures and pressures. With versatility in dimensions, excellent welding properties, and adherence to various tolerance levels and testing standards, these pipes are trusted for critical applications across demanding sectors.

The SA335P91 Boiler Steel Pipe finds extensive use in industrial boilers and various high-temperature and high-pressure systems. They come in lengths ranging from 4,000mm to 26,000mm, dependent on the pipe’s size.

The ASTM A335 gr P91 Round Pipe is available in single, double, or cut end lengths, with plain, threaded, or beveled ends to ensure protection during transportation.

These pipes feature a wall thickness of 3mm-12mm and are offered in various schedules, including sizes 40, 80, 160, XS, and XXS. Tolerances for the ASTM A335 P91 Alloy Steel Smls Pipe are increased by 0.01mm when cold-drawn and 0.05mm when cold-rolled. Adhering to both international and national standards in production, the Alloy Steel SA 335 P91 Smls Pipe boasts enduring strength that doesn’t degrade over time.

Furthermore, these pipes are highly durable and require minimal maintenance. Leveraging the finest ASTM A335 P91 steel Material and cutting-edge technology in our manufacturing processes, we ensure top-quality products. For any inquiries or further information regarding our ASTM A335 P91 Pipe, please don’t hesitate to reach out to us.

A335 P91 Alloy Steel Pipe Specification

Specialized in	Sizes in Large Diameter
OD	19.05 milimeter – 114.3 milimeter
WT	2.0 milimeter – 14 milimeter
Length	maximum 16000 milimeter
Form	Square, Hydraulic, Round, Rectangular, Etc.
Standard	SA335 P91, ASTM A335 P91
Thickness	From 3 to 12 milimeter
Size	From 1/2 NB upto 36 NB
Schedule	Schedule 40, 80, 160, XS, XXS
Tolerance	Cold rolled pipe: +/-0.05 milimeter Cold drawn pipe: +/-0.1 milimeter
Craft	Cold drawn / Cold rolled
Type	ERW / Fabricated / Seamless / Welded
Length	Double Random, Cut Length, Single Random, .
Specialized in	SA335 P91
Additional Testing	NACE TM0177, H2 SERVICE, NACE MR0175, IBR, NACE TM0284, SSC TEST, HIC TEST, etc.

ASTM A335 P91 Chemical Composition

C	Si	Mn	P	S	AL	Cr	Cu	Mo	N	Nb	Ni	V
1.4903	Min%	0.08		0.30				8.0		0.85	0,030	0,060		0.18
	Max %	0.12	0.50	0.60	0,020	0.005	0,040	9.50	0.30	1.05	0,070	0,100	0.30	0.25

ASTM A335 P91 (Chrome Moly Pipe) Alloy Steel Pipe Physical Properties

Temperature T ° C / ° F (° C / F)	Specific heat J / kgK (Btu / lb ° F)	Thermal conductivity W / mK (Btu · in / ft 2 · h · ° F)	Electrical resistance μΩ · cm (Ω circ / ft)	Young’s modulus kN / mm 2 (10 3 ksi)	Expansion coefficient from 20 ° C to T 10 -6 / K (10 -6 / ° F)
20/68	460 (-)	26 (-)		218 (-)
200/392				207 (-)	11.3 (-)
400/752				190 (-)	12.0 (-)
500/932		30 (-)			12.3 (-)
600/1112					12.6 (-)
650/1202				162 (-)	12.7 (-)

Temp.	Time limit	Time limit	Creep strength	Creep strength	Creep strength
	Rp0.2		10 000h	100 000h
° C	N / mm 2 / ksi		N / mm 2 / ksi	N / mm 2 / ksi
20/68	450/65
100/212	410 / 59.4
300/572	360 / 52,2
500/932	300 / 43.5		289 / 41.9	258 / 37.4
550/1022	270 / 39.1		199 / 28,8	166 / 24.0
600/1112	215 / 31,1		122 / 17.6	94 / 13.6
650/1202			70 / 10,1	49 / 7,1
ksi values are calculated

temperature	0.2% proof stress at higher temperatures
° C / ° F	Rp 0.2
	Mpa / ksi
100/212	410 / 59.4
200/392	380 / 55,1
300/572	360 / 52,2
400/752	340 / 49,3
500/932	300 / 43.5
600/1112	215 / 31,1

ASTM A335 P91 Material Mechanical Properties

Yield strength Rp0.2 (N / mm 2 )	> = 450	Normalized + tempered
Yield strength Mpa / ksi	415/60	ASTM A 335 -P91
Tensile strength Rm (N / mm 2 )	620-850	Normalized + tempered
Elongation at break-A5 (%) min.lengths	> = 20	Normalized + tempered
Notched impact strength (J) across	40	transversely / normalized + tempered
Tensile strength Rm N / mm 2 / ksi	585/85	ASTM A 335 -P91

ASTM A335 P91 Werkstoff

EN material short name	X10CrMoVNbN9-1
AFNOR	X10CrMoVNbN9-1 (NF EN 10088-1 (06/2005) (Fri)
BS	X10CrMoVNbN9-1 (EN 10088-1 (06/2005) (GB)
Material no	1.4903
Density / dm 3	7.76
Hardness (HB
alloy	Alloyed stainless steels
group	Stainless steels Heat resistant steel
structure	martensitic

ASTM A335 P91 Pipe Equivalents Standard

ASTM International	Fitting material	Specification	Material
A335 Gr. P91	ASTM A234 WP91	X10CrMoVNb9-1, 1.4903, NIRONIT‎	9% Chrome; 1% Moly + trace elements

We Export ASTM A335 P91 Alloy Steel Pipe To

Pimpri-Chinchwad, Chandigarh, Kuwait City, Ulsan, Ankara, Geoje-si, Hanoi, Noida, Secunderabad, Sharjah, Los Angeles, Ahmedabad, Caracas, Al Khobar, Mexico City, Jaipur, New York, Tehran, Gimhae-si, Muscat, Jakarta, Montreal, Perth, Chiyoda, Madrid, Pune, Baroda, Nagpur, Ludhiana, Surat, Melbourne, Lagos, Bengaluru, Kuala Lumpur, Algiers, Ernakulam, Haryana, Courbevoie, London, Dammam, Brisbane, Thane, Aberdeen, Hong Kong, Doha, Houston, Ahvaz, Bogota, Bangalore, Cochin, Anand, Nadiad, ankleshwar, Bharuch, vapi, Valsad, Medak, Godavari, Mumbai, Dallas, Santiago, Bangkok, New Delhi, Ranchi, Hyderabad, Lahore, Indore, Jeddah, Singapore, Kanpur, Moscow, Coimbatore, Seoul, Navi Mumbai, Granada, Chennai, Sydney, Istanbul, Colombo, Faridabad, Dubai, Howrah, Toronto, Rajkot, Karachi, Milan, Bhopal, Nashik, Cairo, Riyadh, Edmonton, Rio de Janeiro, Kolkata, La Victoria, Vung Tau, Gurgaon, Ho Chi Minh City, Thiruvananthapuram, Visakhapatnam, Petaling Jaya, Atyrau, Vadodara, Jamshedpur, Abu Dhabi, Al Jubail, Manama, Busan, Calgary, Port-of-Spain.

We Supply ASTM A335 P91 Alloy Steel Pipe to

Taiwan, Mexico, Iran, Namibia, Afghanistan, Netherlands, Nepal, Ireland, Libya, Morocco, Iran, Switzerland, Finland, Slovakia, Pakistan, Australia, Serbia, Angola, China, Philippines, Czech Republic, Belgium, Estonia, Costa Rica, Croatia, Sweden, Venezuela, Colombia, India, Belarus, Jordan, Azerbaijan, Mongolia, Vietnam, Ghana, Iraq, Algeria, Puerto Rico, New Zealand, Singapore, Indonesia, Ukraine, Israel, Mexico, Hong Kong, Bhutan, Germany, Brazil, Plan, Yemen, Malasiya, USA, Cambodia, Laos, Uganda, Tanzania, Sudan, Democratic Republic of Congo, zambia, Ethiopia, Brunei, Madagascar, Niger, Mali, Bangladesh, Bolivia, United States, Ecuador, Lebanon, Italy, South Korea, Denmark, Norway, Sri Lanka, Zimbabwe, Japan, Yemen, Oman, Portugal, Lithuania, Canada, Macau, Bahrain, Austria, Bulgaria, Spain, Kenya, United Kingdom, United Arab Emirates, Kazakhstan, Egypt, Saudi Arabia, Gambia, Argentina, Romania, Tibet, France, Chile, Gabon, South Africa, Trinidad & Tobago,Tunisia, Turkey, Nigeria, Peru, Russia, Chile, Nigeria, Hungary, Qatar, Greece, Malaysia, Kuwait, Poland, Thailand, Poland.