High-temperature Seamless Alloy Tubing With Superior Strength And Corrosion Resistance
Astm a213 t91 seamless alloy steel tubes are ideal for high-pressure boilers and superheaters, offering exceptional strength, heat resistance, and long service life.
High-temperature Seamless Alloy Tubing With Superior Strength And Corrosion Resistance
Astm a213 t91 seamless alloy steel tubes are ideal for high-pressure boilers and superheaters, offering exceptional strength, heat resistance, and long service life.
ASTM A213 T91 Seamless Boiler Tubes are premium ferritic alloy steel pipes engineered for high-pressure and high-temperature environments such as boilers, superheaters, and heat exchangers. These tubes are recognized for their excellent creep resistance, thermal fatigue strength, and oxidation resistance.
Compliant with ASTM A213 and ASME SA213 standards, T91 tubes are normalized and tempered to improve structural performance under long-term thermal stress. The alloy composition includes Chromium (8.0–9.5%), Molybdenum (0.85–1.05%), Vanadium, and Niobium, contributing to superior mechanical strength and oxidation resistance.
These seamless ferritic alloy steel tubes are used extensively in thermal power generation and petrochemical industries, especially where operating temperatures exceed 600°C. T91 tubes exhibit excellent weldability, low thermal expansion, and resistance to hydrogen attack, making them ideal for modern ultra-supercritical (USC) boiler designs.
Available sizes range from 1/2” to 5” (DN15–DN125), with thickness options per customer specification. The tubes are delivered in either hot-finished or cold-drawn condition, with beveled or plain ends. Rigorous quality control ensures conformity through hydrostatic testing, hardness tests, and ultrasonic inspections.
Dimensions and performance data for ASTM A213 T91 Seamless Ferritic 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.
ASTM A213 T91 Seamless Ferritic 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.
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