High-temperature Applications
Asme sa213 t91 seamless alloy steel boiler tubes offer superior creep strength and corrosion resistance, designed for high-temperature applications in supercritical and ultra-supercritical boilers, superheaters, and heat exchangers in power plants.
High-temperature Applications
Asme sa213 t91 seamless alloy steel boiler tubes offer superior creep strength and corrosion resistance, designed for high-temperature applications in supercritical and ultra-supercritical boilers, superheaters, and heat exchangers in power plants.
ASME SA213 T91 Seamless Alloy Steel Boiler Tubes are premium-grade ferritic alloy tubes engineered to meet high-pressure and high-temperature demands in boilers, superheaters, and heat exchangers. These tubes are widely used in fossil-fuel and nuclear power generation industries.
Composed primarily of chromium (Cr 8.0–9.5%) and molybdenum (Mo 0.85–1.05%), along with microalloying elements such as vanadium, niobium, and nitrogen, T91 alloy tubes offer excellent creep resistance, strength retention, and oxidation resistance at temperatures up to 620°C.
The manufacturing process includes hot finishing or cold drawing, followed by normalizing at 1040–1080°C and tempering at 730–800°C. These steps refine the grain structure and enhance the mechanical properties, making the tubes suitable for extreme service conditions in steam circuits.
SA213 T91 tubes meet rigorous ASME and ASTM standards, including tensile, hardness, flattening, and hydrostatic testing. Their enhanced mechanical integrity reduces failure risks in pressure-bound systems, ensuring reliable and long-lasting performance under cyclic thermal loads.
These seamless tubes are available in sizes from 1/2” to 5” outer diameter, SCH 40 to SCH 160 thickness, with plain or beveled ends. Additional coatings such as black painting, FBE, or 3LPE are available for external protection during transport and installation.
ASME SA213 T91 alloy tubes are highly recommended for applications involving aggressive thermal cycles, corrosive steam, and continuous pressure variation. Their longer service life compared to carbon steel options contributes to reduced downtime and maintenance costs in boiler systems.
Dimensions and performance data for ASME SA213 T91 Seamless Alloy Steel Boiler 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.
ASME SA213 T91 Seamless Alloy Steel Boiler 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 ...
