ASTM A213 T11 Alloy Steel Sheet,Plate, Chromium Molybdenum, F11-1

ASTM A213 T11 Alloy Steel Sheet/Plate, Chromium Molybdenum, F11-1 Product Information -:- For detailed product information, please contact sales. -: ASTM A213 T11 Alloy Steel Sheet/Plate, Chromium Molybdenum, F11-1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A213 T11 Alloy Steel, Chromium Molybdenum, F11-1 Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A213 T11 / F11-1 Alloy Steel Tube** **Product Overview** ASTM A213 T11, often commercially designated as **F11-1**, is a **chromium-molybdenum (Cr-Mo) low-alloy steel** seamless tube belonging to the classic "1¼Cr-½Mo" alloy family. This grade is specifically engineered for **high-temperature service** in power boilers, superheaters, and heat exchangers, offering enhanced **oxidation resistance** and **creep strength** compared to lower-alloy grades like T2 and T12. With a nominal composition of 1.25% chromium and 0.5% molybdenum, T11 provides superior resistance to steam oxidation and hydrogen attack, making it a standard choice for components operating at elevated temperatures and pressures. The **"F11-1"** designation typically refers to a specific sub-class with a controlled carbon content for improved weldability. **Key International Standards** * **Primary Standard:** **ASTM A213 / A213M** - Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes. * **Governing Specification:** This product conforms to the requirements for **Grade T11** within ASTM A213. * **ASME Designation:** **SA-213 T11** - The mandatory ASME Boiler and Pressure Vessel Code (BPVC) designation. * **Commercial Designation:** **F11-1** (sometimes **F11 Class 1**) indicates a variant with chemistry optimized for welding (typically lower carbon within the allowable range). * **Heat Treatment:** Supplied in the **annealed, normalized and tempered, or full-annealed** condition to ensure a soft, ductile microstructure suitable for tube bending and welding. * **Related Standards:** Equivalent grades include **DIN 17175 14MoV63**, **EN 10216-2 14MoV6-3**, and **JIS G3462 STBA 24**. **Chemical Composition (Weight % - ASTM A213 T11 Requirements & F11-1 Aim)** | Element | ASTM A213 T11 Requirement | F11-1 Typical Aim / Range | | :--- | :--- | :--- | | **Carbon (C)** | 0.05 - 0.15% | **0.05 - 0.10%** (Lower end for weldability) | | **Manganese (Mn)** | 0.30 - 0.60% | 0.40 - 0.60% | | **Phosphorus (P)** | 0.025% max | ≤ 0.020% | | **Sulfur (S)** | 0.025% max | ≤ 0.015% | | **Silicon (Si)** | 0.50 - 1.00% | 0.60 - 0.90% | | **Chromium (Cr)** | **1.00 - 1.50%** | 1.15 - 1.35% | | **Molybdenum (Mo)** | **0.44 - 0.65%** | 0.45 - 0.60% | | **Carbon Equivalent (C.E. IIW)** | -- | Typically 0.45 - 0.55 (F11-1 at lower end) | **Physical & Mechanical Properties (Room Temperature)** | Property | Requirement (ASTM A213 T11) | Typical Performance / Notes | | :--- | :--- | :--- | | **Tensile Strength** | 60 ksi (415 MPa) min | 65 - 85 ksi (448 - 586 MPa) | | **Yield Strength (0.2% Offset)** | 30 ksi (205 MPa) min | 35 - 50 ksi (241 - 345 MPa) | | **Elongation in 2" (Min)** | 30% | 30 - 35% | | **Hardness (Approx., HB)** | -- | ~140-190 HB | | **Maximum Recommended Metal Temperature** | -- | **Up to ~1100°F (593°C)** for prolonged service. The higher Cr content provides excellent oxidation resistance and good resistance to high-temperature hydrogen attack (HTHA). | | **Key Feature** | **Enhanced 1.25Cr-0.5Mo Alloy:** Provides a significant upgrade in oxidation and hydrogen attack resistance over 1% Cr grades (T12), making it suitable for more severe high-temperature environments, particularly in refinery heater tubes and high-temperature superheaters. | **Product Applications** ASTM A213 T11 / F11-1 tubes are specified for demanding high-temperature heat transfer services where oxidation and hydrogen are concerns. * **Superheater & Reheater Tubes:** High-temperature sections in utility and industrial boilers. * **Process Heater Tubes:** Radiant and convection tubes in refinery heaters (e.g., crude, vacuum, coker heaters) where resistance to HTHA is required. * **Heat Exchanger Tubes:** In high-temperature, high-pressure exchangers in petrochemical and refining services. * **Steam Piping & Headers:** For high-temperature steam lines. * **Catalytic Reformer & Hydroprocessor Piping/Transfer Lines.** **Advantages & Fabrication Notes** * **Weldability (F11-1 Advantage):** The "F11-1" specification, with carbon controlled at the lower end, offers **improved weldability** and reduced preheat requirements compared to the maximum carbon T11. However, strict protocols remain: * **Preheat:** Mandatory, typically **400-500°F (204-260°C)**. * **Low-Hydrogen Practice:** Essential (e.g., E8018-B2 electrodes). * **Post-Weld Heat Treatment (PWHT):** **Always required.** Standard range is **1250-1350°F (677-732°C)**. **Very slow cooling through the 1200-800°F (649-427°C) range is critical to prevent reheat cracking**, a known susceptibility of this alloy. * **Superior Oxidation & HTHA Resistance:** The 1.25% Cr content provides a stable, protective oxide layer and good resistance to hydrogen attack per API RP 941 (Nelson Curves) in many refinery services. * **Creep Strength:** Good long-term creep strength due to molybdenum and chromium carbide formation. * **Formability:** Good hot formability. Cold bending may require subsequent stress relief or PWHT. * **Code Compliance:** Fully recognized in the **ASME BPVC, Section I** and **Section VIII**, with published allowable stresses up to 1100°F (593°C). **Disclaimer:** This datasheet provides general information on **ASTM A213 T11 / F11-1** alloy steel tubes. For procurement, specify the complete standard, grade (T11), and if applicable, the **F11-1** sub-designation for enhanced weldability. **Design must be based on ASME BPVC allowable stress values.** Welding and PWHT are critical; WPS/PQR per ASME Section IX is mandatory. **Reheat cracking is a major risk;** procedures must include controlled heating/cooling rates. For hydrogen service, a **formal HTHA assessment per API RP 941 is required**. Material selection and fabrication must be overseen by qualified personnel experienced with Cr-Mo steels. Always consult the tube manufacturer's data and the applicable construction code. -:- For detailed product information, please contact sales. -: ASTM A213 T11 Alloy Steel, Chromium Molybdenum, F11-1 Specification Dimensions Size： Diameter 20-1000 mm Length <4702 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A213 T11 Alloy Steel, Chromium Molybdenum, F11-1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A213 T11 Alloy Steel Sheet,Plate, Chromium Molybdenum, F11-1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A213 T11 Alloy Steel Sheet,Plate, Chromium Molybdenum, F11-1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A213 T11 Alloy Steel Sheet/Plate, Chromium Molybdenum, F11-1 -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Sheet/Plate drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1173 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition