ASTM A335 P91 Pipes are high-performance seamless alloy steel pipes manufactured in accordance with ASTM A335 / ASME SA335 standards and are specifically designed for high-temperature and high-pressure service. This grade contains chromium, molybdenum, vanadium, and niobium, which together provide exceptional creep strength, oxidation resistance, and long-term structural stability at elevated temperatures. ASTM A335 P91 Pipes are widely used in advanced power generation and critical industrial applications.
Metal Tubular Products is a worldwide stockist and supplier of ASTM A335 P91 Pipes, supplying premium-quality seamless pipes to power plants, refineries, petrochemical units, and oil & gas processing facilities. The company maintains a wide inventory covering various diameters, wall thicknesses, and lengths, enabling fast and reliable supply for both shutdown maintenance and large-scale EPC projects across global markets..
ASTM A335 P91 Pipes supplied by Metal Tubular Products offer superior mechanical properties compared to conventional chrome-moly grades. Their excellent creep rupture strength allows operation at higher temperatures and pressures, improving plant efficiency and service life. These pipes are commonly used in superheaters, reheaters, headers, steam pipelines, and high-temperature pressure parts.
All ASTM A335 P91 Pipes are manufactured using advanced seamless processes and are supplied in the normalized and tempered condition to achieve optimum microstructure and performance. Proper heat treatment ensures uniform wall thickness, dimensional accuracy, and enhanced weldability when appropriate welding procedures and post-weld heat treatment are followed..
| Standard | ASTM A335 / ASME SA335 |
|---|---|
| Grade | P91 |
| Material Type | Alloy Steel (Chromium–Molybdenum–Vanadium) |
| Product Form | Seamless |
| Heat Treatment | Normalized & Tempered |
| Manufacturing Process | Hot Finished / Cold Drawn |
| End Finish | Plain End, Beveled End |
| Application | High Temperature & High Pressure Service |
Metal Tubular Products follows stringent quality control and inspection procedures for ASTM A335 P91 Pipes. Testing includes chemical analysis, mechanical and impact testing, hardness testing, hydrostatic testing, and non-destructive examinations. Pipes are supplied with Mill Test Certificates (MTC) as per EN 10204 3.1, ensuring full traceability and compliance with international standards..
With a strong global logistics network, competitive pricing, and technical expertise, Metal Tubular Products has established itself as a trusted supplier of ASTM A335 P91 Pipes worldwide. Their commitment to quality, reliability, and customer support makes them a preferred partner for critical high-temperature piping projects.
| Element | Carbon (C) |
|---|---|
| Composition % | 0.08 – 0.12 |
| Element | Manganese (Mn) |
| Composition % | 0.30 – 0.60 |
| Element | Silicon (Si) |
| Composition % | 0.20 – 0.50 |
| Element | Chromium (Cr) |
| Composition % | 8.00 – 9.50 |
| Element | Molybdenum (Mo) |
| Composition % | 0.85 – 1.05 |
| Element | Vanadium (V) |
| Composition % | 0.18 – 0.25 |
| Element | Niobium (Nb) |
| Composition % | 0.06 – 0.10 |
| Property | Tensile Strength |
|---|---|
| Value | ≥ 585 MPa |
| Property | Yield Strength |
| Value | ≥ 415 MPa |
| Property | Elongation |
| Value | ≥ 20% |
| Property | Hardness |
| Value | ≤ 250 HB |
| Outside Diameter | ½” NB to 24” NB |
|---|---|
| Wall Thickness | SCH 10 to SCH XXS |
| Length | Single Random, Double Random, Custom Length |
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | ASTM A182 F91 (Forgings) |
| EN | EN 10216-2 X10CrMoVNb9-1 |
| DIN | DIN EN X10CrMoVNb9-1 |
| JIS | JIS G3462 SCMVNb9 |
ASTM A335 P91 Pipes are used in high-temperature and high-pressure applications such as superheaters, reheaters, steam pipelines, headers, power plants, refineries, and petrochemical industries.
The “P91” designation refers to a high-strength chromium-molybdenum-vanadium alloy steel designed for superior creep resistance and long-term performance at elevated temperatures.
Yes, ASTM A335 P91 Pipes are supplied in seamless (SMLS) form only, as required by ASTM A335 for critical high-temperature applications.
ASTM A335 P91 Pipes are supplied in normalized and tempered condition to achieve the required microstructure, strength, and creep resistance.
Metal Tubular Products is a worldwide stockist and supplier of ASTM A335 P91 Pipes, offering a wide size range, reliable delivery, and compliance with international quality standards.
We export steel pipes and tubes to over 60 countries worldwide, serving clients across Asia, Europe, the Middle East, Africa, Oceania, and the Americas. Our strong global logistics network ensures reliable delivery, quality assurance, and compliance with international standards.
Export Destinations Include:
Afghanistan, Albania, Andorra, Angola, Austria, Australia, Bahrain, Bangladesh,
Bhutan, Brazil, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus,
Croatia, Czech Republic, Canada, 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, Madagascar, Mexico,
Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal,
New Zealand, North Korea, Netherlands, Norway, Nigeria, Oman, Poland, Portugal,
Pakistan, Palestine, Philippines, Qatar, Russia, Romania, San Marino,
Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Sudan, Syria,
Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine,
United Kingdom, United Arab Emirates (UAE), Uzbekistan, Venezuela, Vietnam,
Yemen, and more.
