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Alloy Steel P91 Pipes

Home P91 Alloy Steel Seamless Pipes

Alloy Steel P91 Seamless Pipes Manufacturer

ASTM A335 Alloy Steel P91 Seamless Pipe, Gr P91 Alloy Steel Pipe, UNS K91560 Seamless Pipes, P91 AS Seamless Pipe Manufacturer & Supplier in India

AS Grade P91 Seamless Pipes, Alloy Steel P91 Round Pipes, Alloy Steel P91 Electropolished Pipes, Alloy Steel P91 Hexagonal Pipes, Alloy Steel P91 Rectangular Pipes Stockists & Exporters

Aspirinox Alloys Inc is a leading manufacturer, suppliers, stockiest and exporters of Alloy Steel P91 Seamless Pipes for high-temperature industrial applications. These alloy steel seamless pipes are widely used in different industries such as oil & gas, power plants, shipbuilding, heavy engineering and other industries.


All our offered range of products are conforming to various national and international standards such as API, ASTM, ASME, ANSI and other standards. We specialize in producing and designing highest quality ASTM A335 Grade P91 Alloy Steel Seamless Pipes P91 in a different size, specification, grades & thickness as per the client’s requirements.


Our mill finished Alloy Steel P91 Pipes are well known in the industry and used for various commercial applications. All our provided products such as Alloy Steel P91 Seamless Round Pipes are widely appreciated for their high strength and durability. Alloy Steel P91 Seamless Rectangular Pipes are offered in compliance with various specifications as per the customer requirements. Aspirinox Alloys Inc offers a complete line of products, services and technologies within the energy efficiency industry. Contact us today!

P91 Alloy Steel Pipes Dealer, ASME SA 335 Gr. P91 AS Pipes, Alloy Steel P91 Seamless Hollow Pipes, Alloy Steel P91 Pipes, Alloy Steel P91 Hydraulic Pipes Wholesalers

ASTM A 335 Alloy Steel P91 Pipes Specifications

Specifications for Alloy Steel P91 Seamless Pipes. If any specification is not mentioned here, please use the contact button for quick quote.

Specifications ASTM A 335 ASME SA 335
Dimensions ASTM, ASME and API
Size 1/8″NB TO 30″NB IN
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type Seamless
Form Round Pipes, Custom Pipes, Square Pipes, Rectangular Pipe, “U” Shape, Hydraulic Pipes
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded

Types of Alloy Steel P91 Pipes

  • Alloy Steel P91 Seamless Pipe
  • P91 Alloy Steel Seamless Pipe

  • UNS K11522 Seamless Pipe
  • ASTM A335 P91 Alloy Seamless Pipe

ASME SA 335 Alloy Steel P91 Pipes Chemical Composition

Grade Alloy P91
C 0.08-0.12
Cr 8.00-9.50
Mn 0.30-0.60
Mo 0.85-1.05
P 0.020 max
S 0.010 max
Si 0.20-0.50

Mechanical Properties of P91 Alloy Steel Pipes

Grade Alloy P91
Tensile Strength, MPa 585 min
Yield Strength, MPa 415 min
Elongation  20 min

Outside Diameter & Tolerance of Alloy Steel P91 Seamless & Welded Pipes

ASTM A450 Hot rolled Outside Diameter, mm Tolerance, mm
OD≤101.6 +0.4/-0.8
101.6<OD≤190.5 +0.4/-1.2
190.5<OD≤228.6 +0.4/-1.6
Cold Drawn Outside Diameter, mm Tolerance, mm
OD<25.4 ±0.10
25.4≤OD≤38.1 ±0.15
38.1<OD<50.8 ±0.20
50.8≤OD<63.5 ±0.25
63.5≤OD<76.2 ±0.30
76.2≤OD≤101.6 ±0.38
101.6<OD≤190.5 +0.38/-0.64
190.5<OD≤228.6 +0.38/-1.14
ASTM A530 & ASTM A335 NPS Outside Diameter, inch Tolerance, mm
1/8≤OD≤1-1/2 ±0.40
1-1/2<OD≤4 ±0.79
4<OD≤8 +1.59/-0.79
8<OD≤12 +2.38/-0.79
OD>12 ±1%

Alloy Steel P91 – Wall thickness & Tolerance

ASTM A450 Hot rolled Outside Diameter, mm Tolerance, %
OD≤101.6, WT≤2.4 +40/-0
OD≤101.6, 2.4<WT≤3.8 +35/-0
OD≤101.6, 3.8<WT≤4.6 +33/-0
OD≤101.6, WT>4.6 +28/-0
OD>101.6, 2.4<WT≤3.8 +35/-0
OD>101.6, 3.8<WT≤4.6 +33/-0
OD>101.6, WT>4.6 +28/-0
Cold Drawn Outside Diameter, mm Tolerance, %
OD≤38.1 +20/-0
OD>38.1 +22/-0
ASTM A530 NPS Outside Diameter, inch Tolerance, %
1/8≤OD≤2-1/2 +20.0/-12.5
3≤OD≤18, WT/OD≤5% +22.5/-12.5
3≤OD≤18, WT/OD>5% +15.0/-12.5
OD≥20, WT/OD≤5% +22.5/-12.5
OD≥20, WT/OD>5% +15.0/-12.5

Alloy Steel P91 Pipe Forms & Availability

  • Alloy Steel P91 Round Pipe
  • P91 Alloy Steel Round Pipe
  • UNS K11522 Seamless Round Pipe
  • Alloy Steel UNS K11522 Round Pipe
  • ASTM A335 P91 Alloy Steel Round Pipes
  • Alloy Steel P91 Rectangular Pipe
  • P91 Alloy Steel Rectangular Pipe
  • UNS K11522 Seamless Rectangular Pipe

  • Alloy Steel UNS K11522 Rectangular Pipe
  • ASTM A335 P91 Alloy Steel Rectangular Pipes
  • Alloy Steel P91 Custom Pipe
  • P91 Alloy Steel Custom Pipe
  • UNS K11522 Seamless Custom Pipe
  • Alloy Steel UNS K11522 Custom Pipe
  • ASTM SA335 P91 Alloy Steel Custom Pipes

Alloy Steel P91 Pipe Updated Price List

Contact us or click on the below button to request a latest Alloy Steel P91 pipes price list. Aspirinox Alloys INC is dedicated to providing the world class Alloy Steel P91 pipes that cater all your demands at very competitive rates.

P91 Alloy Steel Pipes Value Added Services

Material Testing:

  • Mechanical Testing Such as Tensile of Area
  • Hardness Test
  • Chemical Analysis – Spectro Analysis
  • Positive Material Identification – PMI Testing
  • Flattening Test
  • Micro and MacroTest
  • Pitting Resistance Test
  • Flaring Test
  • Intergranular Corrosion (IGC) Test

Documentation & Packaging:

  • Commercial Invoice including HS Code
  • Packing List including Complete Details
  • Certificate of Origin legalized
  • Material Traceability Records
  • Quality Assurance Plan (QAP)
  • Heat Treatment Charts
  • Material Test Certificates (MTC)
  • Guarantee Letter
  • NABL approved Laboratory Test Reports

Exporting Alloy Steel P91 Pipes to Below Countries

Afghanistan, Albania, Andorra, Austria, Bahrain, Bangladesh, Bhutan, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, North Korea, Netherlands, Norway, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Vietnam, Yemen

Supplying Alloy Steel P91 Pipes to Following Domestic Cities

Mumbai, Delhi, Kolkata, Chennai, Bengaluru, Hyderabad, Ahmadabad, Pune, Surat, Jaipur, Kanpur, Lucknow, Nagpur, Ghaziabad, Indore, Coimbatore, Kochi, Patna, Kozhikode, Bhopal, Thrissur, Vadodara, Agra, Malappuram, Thiruvananthapuram, Kannur, Ludhiana, Nashik, Vijayawada, Madurai, Varanasi, Meerut, Faridabad, Rajkot, Jamshedpur, Srinagar, Jabalpur, Asansol, Vasai Virar City, Allahabad, Dhanbad, Aurangabad, Amritsar, Jodhpur, Ranchi, Raipur, Kollam, Gwalior, Durg-Bhilainagar, Chandigarh, Tiruchirappalli, Kota

Industries & Applications Where Our Alloy Steel P91 Pipes Are Used

Chemicals, Petrochemicals, Oil & Natural Gas Organization, Fats, Fertilizers, Sugar Mills & Distilleries, Cement Industries, Ship Builders, Paper Industries, Pumps, Automation, Paints, Steel Industries, etc.