ASTM A213 T91 Alloy Steel Seamless Tubes Manufacturer & Supplier
Amardeep Steel Centre is a premier manufacturer and global supplier of high-performance ASTM A213 T91 Tubes. We specialize in Creep Strength Enhanced Ferritic (CSEF) steels, delivering superior tubing solutions engineered for the most demanding high-temperature, high-pressure environments in modern power generation and process industries. Trust Amardeep Steel Centre for T91 Seamless Tubes that meet and exceed stringent international standards.
Understanding ASTM A213 T91 Tubes: The Advanced 9Cr-1Mo-VNb Steel
ASTM A213 T91 Tubes represent a significant advancement in alloy steel technology, specifically classified as a Creep Strength Enhanced Ferritic (CSEF) steel. Designated as UNS K90901 Tubes, this grade is a sophisticated 9% Chromium, 1% Molybdenum alloy, meticulously modified with additions of Vanadium, Niobium, and Nitrogen. Often referred to as Chrome-Moly T91 Tubes, its unique micro-alloying and controlled heat treatment result in a tempered martensitic microstructure, delivering exceptional high-temperature strength, creep resistance, and improved fatigue life compared to conventional Cr-Mo steels.
The primary advantage of ASTM A213 T91 Alloy Steel Seamless Tubes lies in their ability to operate reliably at higher temperatures and pressures, making them indispensable for enhancing the efficiency and performance of modern thermal power plants, particularly in ultra-supercritical (USC) boiler applications. These tubes are manufactured in strict accordance with the ASTM A213 standard, with ASME SA213 T91 being the equivalent specification for boiler and pressure vessel code applications. The seamless construction ensures maximum integrity under extreme operating conditions.
ASTM A213 T91 Alloy Steel Seamless Tube Specifications
Our ASTM A213 T91 Tubes are manufactured and rigorously tested to meet stringent international standards, ensuring they deliver unparalleled performance and safety in critical high-temperature service. Key specifications include:
| Specification | Details |
|---|---|
| Standard | ASTM A213, ASME SA213 |
| Grade | T91 (UNS K90901) |
| Product Description | Seamless CSEF 9Cr-1Mo-VNb Alloy Steel Tubes |
| Manufacturing Process | Hot finished or Cold drawn + Heat Treatment |
| Heat Treatment | Normalized ≥ 1040°C, Tempered ≥ 730°C |
| Outside Diameter (OD) | 1/2" (12.7mm) to 5" (127mm) |
| Wall Thickness (WT) | Sch 40, Sch 80, Sch 160, XXS & custom |
Chemical Composition & Mechanical Properties of Alloy Steel T91 Tubing
Chemical Composition (wt %) of ASTM A213 T91 Tubes
| Element | Content (wt %) |
|---|---|
| Carbon (C) | 0.08 - 0.12 |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | 0.020 max |
| Sulfur (S) | 0.010 max |
| Silicon (Si) | 0.20 - 0.50 |
| Chromium (Cr) | 8.00 - 9.50 |
| Molybdenum (Mo) | 0.85 - 1.05 |
| Vanadium (V) | 0.18 - 0.25 |
| Niobium (Nb) | 0.06 - 0.10 |
| Nitrogen (N) | 0.030 - 0.070 |
| Aluminum (Al) | 0.02 max (typically 0.04 for some specs) |
Mechanical Properties of ASTM A213 T91 Tubes
The enhanced mechanical strength of A213 T91 Seamless Tubes is a key attribute:
| Property | Value (Minimum, unless stated) |
|---|---|
| Tensile Strength | 85,000 psi (585 MPa) |
| Yield Strength | 58,000 psi (400 MPa) |
| Elongation (in 2in/50mm) | 20% |
| Hardness | Rockwell B: 97 max / Brinell: 250 max (varies slightly with spec edition) |
Alloy Steel A213 T91 Tubing Outside Diameter and Tolerance
Amardeep Steel Centre supplies ASTM A213 T91 Tubes adhering to precise dimensional controls:
Outside Diameter (OD) & Wall Thickness (WT): As per the ranges specified in the "ASTM A213 T91 Tube Specifications" section, catering to diverse high-performance design needs.
Tolerances: Strictly in accordance with ASTM A1016/A1016M.
Lengths: Standard lengths of 6 meters (20 ft) and 12 meters (40 ft) are readily available. Custom cut-to-length services are also offered.
Types & Forms of ASTM A213 T91 Alloy Steel Seamless Tubes Available
We provide ASTM A213 T91 Tubes in forms suitable for critical high-temperature, high-pressure power and process applications:
Forms: Exclusively Seamless, manufactured as mandated by ASTM A213 for maximum integrity and reliability.
Types:
- Round Tubes: The standard form for boiler, superheater, reheater, and steam line applications.
- U-Tubes: Fabricated for specialized T91 heat exchanger tubes where very high temperatures and pressures are encountered.
Ends:
- Plain Ends (PE): Cleanly cut, ready for fabrication.
- Bevelled Ends (BE): Prepared for high-integrity welding, crucial for T91.
Surface Condition: Supplied in the normalized and tempered condition, often with a specific surface finish as required by the application.
Applications & Industries Served by ASTM A213 T91 Tubes
The exceptional high-temperature strength and creep resistance of ASTM A213 T91 Tubes make them the material of choice for the most demanding thermal applications:
- Boiler Tubes: ASTM A213 T91 Boiler Tubes are used in critical components like waterwalls, superheaters, and reheaters in ultra-supercritical (USC) and advanced ultra-supercritical (A-USC) power boilers.
- T91 Superheater & Reheater Tubes: For the highest temperature sections of modern power plants.
- Main Steam Lines & Header Piping: Carrying high-pressure steam to turbines.
- Heat Recovery Steam Generators (HRSGs): In combined cycle power plants.
- Petrochemical & Refinery Heaters: For severe fired heater tube applications.
- Advanced Power Generation: Critical for coal-fired USC plants and gas-fired combined cycles.
- Chemical Processing: For equipment under high thermal and mechanical stress.
T91 Seamless Tubes allow for thinner wall designs, improving heat transfer and reducing fatigue in cyclic service.
Why Choose Amardeep Steel Centre for Your ASTM A213 T91 Tubes?
Selecting Amardeep Steel Centre as your supplier for ASTM A213 T91 Tubes ensures you receive superior quality material backed by unparalleled expertise in advanced Creep Strength Enhanced Ferritic (CSEF) steels:
- Manufacturing Excellence & Metallurgical Control: Our state-of-the-art in‐house seamless mill and precisely controlled heat treatment facilities are paramount for producing ASTM A213 T91 Tubes. We ensure consistent wall thickness, superior metallurgical properties (achieving the critical tempered martensitic microstructure), and strict adherence to international specifications.
- Global Exporter with Specialized Expertise: Amardeep Steel Centre is a trusted manufacturer and exporter of advanced Chrome-Moly T91 Tubes and other CSEF steels. We cater to the stringent requirements of international clients in the USA, Canada, UAE, Saudi Arabia, Europe, Southeast Asia, and other key industrial markets.
- Strategic Inventory & Rapid Delivery: We maintain a strategic inventory of A213 T91 Seamless Tubes in standard 6-meter (20ft) and 12-meter (40ft) lengths, facilitating prompt shipment for critical project timelines. Efficient custom cut-to-length services are also available.
- Uncompromised Certified Quality: Our dedication to quality for these advanced alloys is reinforced by our ISO 9001 certification. All UNS K90901 Tubes are supplied with comprehensive EN 10204 3.1/3.2 Mill Test Certificates (MTC), providing full traceability and verification of chemical and mechanical properties. We welcome rigorous third‐party inspections (TUV, DNV, Lloyd’s, etc.).
- Dedicated Technical & Welding Support: Our highly experienced team of metallurgists and engineers is available 24/7 to provide expert guidance on material selection, critical welding procedures (T91 requires specialized welding protocols), fabrication considerations, and application challenges related to your ASTM A213 T91 Tubes requirements.
Related Products
To complement our ASTM A213 T91 tubes, Amardeep Steel Centre also offers a comprehensive selection of high-performance materials for demanding high-temperature applications:
- ASTM A335 P91 Pipes
- ASTM A213 T5 Tubes
- ASTM A213 T9 Tubes
- ASTM A213 T11 Tubes
- ASTM A213 T22 Tubes
- ASTM A213 T92 Tubes
Get Your ASTM A213 T91 Tubes Price & Information!
For the latest price, detailed technical specifications, or to discuss your specific project requirements for ASTM A213 T91 Tubes, please contact our expert team today. Amardeep Steel Centre is your trusted partner for advanced Creep Strength Enhanced Ferritic materials, offering competitive quotations and unparalleled service for your most critical applications.