Seamless Ferritic Alloy Steel For High-temperature Boilers
Sa213 t91 tubes are seamless ferritic alloy steel tubes ideal for high-temperature boiler, heat exchanger, and superheater service with excellent creep and corrosion resistance.
Seamless Ferritic Alloy Steel For High-temperature Boilers
Sa213 t91 tubes are seamless ferritic alloy steel tubes ideal for high-temperature boiler, heat exchanger, and superheater service with excellent creep and corrosion resistance.
SA213 T91 Tubes are seamless ferritic alloy steel tubes designed for high-temperature service in boilers, heat exchangers, and superheaters. These tubes are engineered for superior performance in power plants, refineries, and other demanding industrial systems operating under elevated temperature and pressure.
Manufactured according to ASME SA213 and ASTM A213 standards, T91 alloy tubes are composed of Chromium, Molybdenum, and Vanadium, with a microstructure that offers exceptional creep strength and long-term thermal stability. These properties make them ideal for ultra-supercritical steam cycles and high-efficiency thermal systems.
The tubes undergo a normalizing and tempering heat treatment to enhance toughness, oxidation resistance, and weld integrity. The low carbon content and addition of niobium and nitrogen improve resistance to hydrogen attack and stress corrosion cracking.
SA213 T91 seamless tubes are available in sizes ranging from 1/4” to 5” OD, with wall thicknesses from SCH10 to SCH160 or custom. Common surface treatments include black painting, anti-rust oil, or FBE coating. End types include plain, beveled, or threaded ends, tailored for specific piping system integration.
Widely used in fossil fuel power plants, petrochemical heaters, and industrial waste heat recovery systems, T91 tubes offer long service life, improved operational safety, and reduced maintenance. The tube’s performance has been proven in steam temperatures up to 620°C (1150°F) and pressures beyond 600 bar.
T91 has higher chromium (8.0–9.5% vs. 1.0–1.5%), higher molybdenum (0.85–1.05% vs. 0.44–0.65%), and includes vanadium and niobium for superior creep strength. T91 supports higher temperatures (up to 650°C vs. 560°C) and has higher strength (585/415 MPa vs. 415/205 MPa).
T91 has higher chromium (8.0–9.5% vs. 0.8–1.25%), higher molybdenum (0.85–1.05% vs. 0.44–0.65%), and includes vanadium and niobium, offering better corrosion and creep resistance. T91 is suited for ultra-supercritical boilers (up to 650°C vs. 550°C) with higher strength (585/415 MPa vs. 415/220 MPa).
T91 has higher chromium (8.0–9.5% vs. 1.9–2.6%) and similar molybdenum (0.85–1.05% vs. 0.87–1.13%) but includes vanadium and niobium for enhanced creep resistance. T91 supports higher temperatures (650°C vs. 593°C) and has higher strength (585/415 MPa vs. 415/205 MPa).
T91 has similar chromium (8.0–9.5% vs. 8.0–10.0%) and molybdenum (0.85–1.05% vs. 0.9–1.1%) but includes vanadium and niobium for superior creep resistance. T91 has higher strength (585/415 MPa vs. 415/205 MPa) and is suited for ultra-supercritical boilers (up to 650°C vs. 620°C).
T92 is an enhanced version of T91, with added tungsten (1.5–2.0%) and boron (0.001–0.006%) for improved creep strength, but similar chromium (8.5–9.5% vs. 8.0–9.5%) and slightly higher strength (620/440 MPa vs. 585/415 MPa). Both are used in ultra-supercritical boilers (up to 650°C).
T91 has higher chromium (8.0–9.5% vs. 2.2–2.6%) but similar vanadium and niobium, while T24 includes titanium and boron. T91 is suited for ultra-supercritical boilers (up to 650°C vs. 600°C) with similar strength (585/415 MPa).
T91 (ASME SA213) is a seamless tube for heat transfer components (thinner walls, OD 1/8” to 5”), while P91 (ASTM A335) is a pipe for structural and pressure piping (OD 1/8” to 48”). Both share the same 9Cr–1Mo–V–Nb chemistry but are used in different applications.
The ASME SA213 T91 Seamless Alloy Tube addresses critical challenges like corrosion, creep, and thermal stress in high-throughput industrial systems. Its advanced alloy composition and seamless construction make it a premium choice for engineers seeking durable boiler tubes and heat exchanger tubes for extreme environments.
For more information or to inquire about pricing, contact reputable suppliers like U.S. Metals or Savoy Piping.
Dimensions and performance data for SA213 T91 Tubes
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08-0.12 |
| Manganese (Mn) | 0.30-0.60 |
| Phosphorus (P) | ≤0.020 |
| Sulfur (S) | ≤0.010 |
| Silicon (Si) | 0.20-0.50 |
| Chromium (Cr) | 8.00-9.50 |
| Molybdenum (Mo) | 0.85-1.05 |
| Vanadium (V) | 0.18-0.25 |
| Nitrogen (N) | 0.03-0.07 |
| Property | Value |
|---|---|
| Tensile Strength, min (MPa) | 585 |
| Yield Strength, min (MPa) | 415 |
| Elongation, min (%) | 20 (Longitudinal) |
| Hardness, max (HB) | 217 |
| Parameter | Range | Standard |
|---|---|---|
| Inside Diameter | 1/8" to 5" | 3.2 mm to 127 mm |
| Wall Thickness | 0.015" to 0.500" | 0.4 mm to 12.7 mm |
| Length | 5–7 m / 9–13 m | SRL / DRL |
| Schedule | 40 to 160 | STD, XS, XXS |
| Property | Value | Unit |
|---|---|---|
| Max Service Temperature | 650 | °C |
| Tensile Strength | 415–690 | MPa |
| Yield Strength | 205–520 | MPa |
| Elongation | 20–30 | % |
Key advantages that make ASTM A213 alloy tubes a preferred choice in high-temperature and corrosive environments.
Maintains structural integrity under extreme heat, ideal for boilers, heat exchangers, and superheaters.
Chromium and molybdenum ensure excellent resistance to oxidation and chemical attack in aggressive media.
Offers high tensile and yield strength, ensuring safe performance under high pressure and temperature.
Durable construction and corrosion resistance extend operational life and minimize maintenance downtime.
Precision manufacturing ensures uniform wall thickness and surface finish, optimizing heat transfer and fit.
Widely used in power generation, petrochemical, and thermal processing industries due to its performance and reliability.
SA213 T91 Tubes are widely used in various industries due to their excellent high-temperature and high-pressure performance.
Utilized in boilers, superheaters, and reheaters within steam power plants due to their high-temperature resistance and durability.
Employed in refineries and chemical plants for transporting high-temperature fluids and gases, ensuring safety and efficiency.
Ideal for use in heat exchangers where thermal stability and corrosion resistance are critical under fluctuating temperatures.
Commonly used in high-pressure boilers and superheaters, offering excellent performance under extreme thermal conditions.
Applied in the extraction and processing of oil and gas, handling high-pressure and high-temperature fluids effectively.
Suitable for equipment in chemical industries where resistance to corrosive substances and high temperatures is essential.
Astm a213 t91 alloy steel boiler tubes offer high ...
Sa213 t91 boiler tubes are seamless alloy steel tu...
Astm a213 t91 seamless alloy tubes offer superior ...
