Chrome-moly Alloy Tube Ideal For Boilers, Superheaters & Heat Exchangers
Astm a213 t11 seamless alloy pipe offers excellent strength and corrosion resistance for high-temperature boiler and heat exchanger applications.
Chrome-moly Alloy Tube Ideal For Boilers, Superheaters & Heat Exchangers
Astm a213 t11 seamless alloy pipe offers excellent strength and corrosion resistance for high-temperature boiler and heat exchanger applications.
ASTM A213 T11 seamless alloy pipes are ferritic low alloy steel tubes designed for high-temperature service in boilers, superheaters, and heat exchangers. These chrome-moly pipes offer outstanding strength, creep resistance, and corrosion resistance in thermal environments.
Produced in accordance with the ASTM A213 standard, T11 tubes are typically delivered in annealed or normalized and tempered conditions to meet performance requirements. With a Chromium content of 1.00–1.50% and Molybdenum 0.44–0.65%, the alloy structure enhances hardness, temperature resistance, and weldability.
T11 alloy steel tubes are widely used in power generation and chemical processing industries, where high pressure and elevated temperature are common. These seamless pipes withstand up to 560°C, making them ideal for high-efficiency boilers, steam lines, and petrochemical reactors.
Sizes typically range from 1/2” to 24” outer diameter, with wall thickness from SCH 40 to SCH XXS or customized. Ends can be plain, beveled, or threaded to suit installation requirements.
| Element | Range |
|---|---|
| Carbon (C) | 0.05–0.15 |
| Manganese (Mn) | 0.30–0.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Silicon (Si) | 0.50–1.00 |
| Chromium (Cr) | 1.00–1.50 |
| Molybdenum (Mo) | 0.44–0.65 |
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 415 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 30 |
| Hardness (HBW) | ≤ 179 |
T11 has slightly higher chromium (1.0–1.5% vs. 0.8–1.25%) and similar molybdenum (0.44–0.65%), offering marginally better corrosion resistance. Both have comparable strength (415/205 MPa vs. 415/220 MPa) and operate up to 560°C vs. 550°C.
T22 contains more chromium (1.9–2.6%) and molybdenum (0.87–1.13%) than T11 (1.0–1.5% Cr, 0.44–0.65% Mo), improving corrosion and creep resistance. Suitable for higher temperatures (up to 593°C vs. 560°C) with similar strength (415/205 MPa).
T9 provides significantly more chromium (8–10% vs. 1.0–1.5%), leading to better corrosion resistance and heat tolerance (620°C vs. 560°C). Both offer similar strength (415/205 MPa), but T11 is more economical for standard environments.
T91 features vanadium and niobium, with higher chromium (8–9.5%) and strength (585/415 MPa vs. 415/205 MPa), offering superior creep resistance. T91 is ideal for ultra-supercritical boilers (up to 650°C); T11 is preferred for moderate pressure systems.
T11 (ASTM A213) is a seamless tube for heat transfer components (thinner walls, OD 1/8” to 5”), while P11 (ASTM A335) is a pipe for structural and pressure piping (OD 1/8” to 48”). Both share the same 1.25Cr–0.5Mo chemistry but are used in different applications.
ASTM A213 is a specification for seamless ferritic and austenitic alloy steel boiler, superheater, and heat-exchanger tubes. These tubes are designed to withstand high temperatures and pressures, making them ideal for use in power generation and petrochemical applications.
Common grades include T91, T92, T11, T12, and T22, each offering unique properties for specific applications. The tubes are manufactured to stringent quality standards, ensuring reliability and performance in demanding environments.
Withstands thermal shock and operates at temperatures up to 650°C for grades like T91 and T92.
Excellent oxidation and corrosion resistance in aggressive chemical and petrochemical environments.
Seamless tubing ensures high structural integrity under pressure and temperature variations.
Improved creep strength and mechanical performance for long-term use in power plants.
Suitable for HRSGs, heat exchangers, boilers, and instrumentation systems in multiple industries.
Supports efficient welding and forming for field installation and system integration.
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.
Dimensions and performance data for ASTM A213 tubes and pipes.
| Grade | UNS | C | Mn | P | S | Si | V | B | Nb | N | Al | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T2 | K11547 | 0.10–0.20 | 0.30–0.61 | 0.025 | 0.025B | 0.10–0.30 | – | – | – | – | – | – |
| T5 | K41545 | 0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.5 | – | – | – | – | – | – |
| T5b | K51545 | 0.15 | 0.30–0.60 | 0.025 | 0.025 | 1.00–2.00 | – | – | – | – | – | – |
| T5c | K41245 | 0.12 | 0.30–0.60 | 0.025 | 0.025 | 0.5 | – | – | – | – | – | – |
| T9 | K90941 | 0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.25–1.00 | – | – | – | – | – | – |
| T11 | K11597 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.50–1.00 | – | – | – | – | – | – |
| T12 | K11562 | 0.05–0.15 | 0.30–0.61 | 0.025 | 0.025B | 0.5 | – | – | – | – | – | – |
| T17 | K12047 | 0.15–0.25 | 0.30–0.61 | 0.025 | 0.025 | 0.15–0.35 | 0.15 | – | – | – | – | – |
| T21 | K31545 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.50–1.00 | – | – | – | – | – | – |
| T22 | K21590 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.5 | – | – | – | – | – | – |
| T23 | K40712 | 0.04–0.10 | 0.10–0.60 | 0.03 | 0.01 | 0.5 | 0.20–0.30 | 0.0010–0.006 | 0.02–0.08 | 0.015 | 0.03 | 1.45–1.75 |
| T24 | K30736 | 0.05–0.10 | 0.30–0.70 | 0.02 | 0.01 | 0.15–0.45 | 0.20–0.30 | 0.0015–0.007 | – | 0.012 | 0.02 | – |
| T36 | K21001 | 0.10–0.17 | 0.80–1.20 | 0.03 | 0.025 | 0.25–0.50 | 0.02 | – | 0.015–0.045 | 0.02 | 0.05 | – |
| T91 | K90901 | 0.07–0.14 | 0.30–0.60 | 0.02 | 0.01 | 0.20–0.50 | 0.18–0.25 | – | 0.06–0.10 | 0.030–0.07 | 0.02 | – |
| T92 | K92460 | 0.07–0.13 | 0.30–0.60 | 0.02 | 0.01 | 0.5 | 0.15–0.25 | 0.001–0.006 | 0.04–0.09 | 0.030–0.07 | 0.02 | 1.5–2.00 |
| T122 | K91271 | 0.07–0.14 | 0.7 | 0.02 | 0.01 | 0.5 | 0.15–0.30 | 0.0005–0.005 | 0.04–0.10 | 0.040– | 0.02 | 1.50–2.50 |
| T911 | K91061 | 0.09–0.13 | 0.30–0.60 | 0.02 | 0.01 | 0.10–0.50 | 0.18–0.25 | 0.0003–0.006 | 0.06–0.10 | 0.040–0.09 | 0.02 | 0.90–1.10 |
| Grade | Tensile Strength (MPa) |
Yield Point (MPa, min) |
Elongation (%, min) |
Impact (J, min) |
Hardness (HRB, max) |
|---|---|---|---|---|---|
| A213 T2 / SA213 T2 | ≥415 | 205 | – | – | 85 |
| A213 T11 / SA213 T11 | ≥415 | 205 | – | – | 85 |
| A213 T22 / SA213 T22 | ≥415 | 205 | – | – | 85 |
| A213 T23 / SA213 T23 | ≥510 | 400 | 20 | – | 97 |
| A213 T24 / SA213 T24 | ≥585 | 415 | 20 | – | 25 |
| A213 T91 / SA213 T91 | ≥585 | 415 | 20 | – | 25 |
| A213 T911 / SA213 T911 | ≥620 | 440 | 20 | – | 25 |
| A213 T92 / SA213 T92 | ≥620 | 440 | 20 | – | 25 |
| A213 T122 / SA213 T122 | ≥620 | 400 | 20 | – | 25 |
| TP304H | ≥515 | 205 | 35 | – | 90 |
| TP316H | ≥515 | 205 | 35 | – | 90 |
| TP321H | ≥515 | 205 | 35 | – | 90 |
| TP347H | ≥515 | 205 | 35 | – | 90 |
| S30432 | ≥590 | 235 | 35 | – | 95 |
| TP310HCbN | ≥655 | 295 | 30 | – | 100 |
| Grade | UNS Number |
Heat Treat Type | Austenitizing / Solutioning Temp. °F [°C] |
Cooling Media | Annealing / Tempering Temp. °F [°C] |
ASTM Grain Size | |
|---|---|---|---|---|---|---|---|
| T2 | K11547 | Full or Isothermal Anneal | – | – | – | – | |
| Normalize and Temper | – | – | – | – | |||
| Subcritical Anneal | – | – | 1200 to 1350 [650 to 730] |
– | |||
| T5 | K41545 | Full or Isothermal Anneal | – | – | – | – | |
| Normalize and Temper | – | – | 1250 [675] |
– | |||
| T23 | K40712 | Normalize and Temper | 1900–1975 [1040–1080] |
– | 1350–1470 [730–800] |
– | |
| T91 | K90901 | Normalize and Temper | 1900–1975 [1040–1080] |
– | 1350–1470 [730–800] |
– | |
| 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 | % |
ASTM A213 T11 Seamless Alloy Pipe 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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