ASTM A213 T12 Alloy Steel Wire, Chromium Molybdenum

ASTM A213 T12 Alloy Steel Wire, Chromium Molybdenum Product Information -:- For detailed product information, please contact sales. -: ASTM A213 T12 Alloy Steel Wire, Chromium Molybdenum Synonyms -:- For detailed product information, please contact sales. -:

ASTM A213 T12 Alloy Steel, Chromium Molybdenum Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A213 / ASME SA-213 T12 Alloy Steel Tube** **Product Overview** ASTM A213 T12 is a **chromium-molybdenum (Cr-Mo) low-alloy steel** seamless tube specifically designed for **elevated temperature service** in power generation and process industries. As a member of the T-series alloy tubes, T12 offers a higher chromium content than the basic T2 grade, providing improved **oxidation resistance** and **hydrogen attack resistance**. With a nominal composition of 1% chromium and 0.5% molybdenum, it is engineered for applications where operating temperatures and pressures exceed the capabilities of carbon-molybdenum steels (like A209 T1) and where better scaling resistance than T2 is required. T12 is a standard material for superheater, reheater, and high-temperature heat exchanger tubing. **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 all requirements for **Grade T12** within ASTM A213. * **ASME Designation:** **SA-213 T12** - The mandatory ASME Boiler and Pressure Vessel Code (BPVC) designation for code-stamped equipment. * **Heat Treatment:** Typically 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 or closely related grades include **DIN 17175 10CrMo910** (slightly different composition), **EN 10216-2 13CrMoSi5-5**, and **JIS G3462 STBA 22**. **Chemical Composition (Weight % - ASTM A213 T12 Requirements)** | Element | ASTM A213 T12 Requirement | Typical Range / Aim | | :--- | :--- | :--- | | **Carbon (C)** | 0.05 - 0.15% | 0.10 - 0.14% | | **Manganese (Mn)** | 0.30 - 0.61% | 0.40 - 0.60% | | **Phosphorus (P)** | 0.025% max | ≤ 0.020% | | **Sulfur (S)** | 0.025% max | ≤ 0.015% | | **Silicon (Si)** | 0.50% max | 0.25 - 0.50% | | **Chromium (Cr)** | **0.80 - 1.25%** | 0.85 - 1.15% | | **Molybdenum (Mo)** | **0.44 - 0.65%** | 0.44 - 0.65% | | **Carbon Equivalent (C.E. IIW)** | -- | Typically 0.40 - 0.48 | **Physical & Mechanical Properties (Room Temperature)** | Property | Requirement (ASTM A213 T12) | Typical Performance / Notes | | :--- | :--- | :--- | | **Tensile Strength** | 60 ksi (415 MPa) min | 65 - 80 ksi (448 - 552 MPa) | | **Yield Strength (0.2% Offset)** | 32 ksi (220 MPa) min | 35 - 45 ksi (241 - 310 MPa) | | **Elongation in 2" (Min)** | 30% | 30 - 35% | | **Hardness (Approx., HB)** | -- | ~140-180 HB | | **Maximum Recommended Metal Temperature** | -- | **Up to ~1050°F (566°C)** for prolonged service. The higher chromium content provides improved oxidation resistance over T2, extending its useful temperature range. | | **Key Feature** | **Enhanced Oxidation & Hydrogen Resistance:** The increased chromium content (~1% Cr) provides superior resistance to high-temperature oxidation (scaling) and offers some protection against high-temperature hydrogen attack (HTHA) in certain refinery environments compared to lower-chromium grades. | **Product Applications** ASTM A213 T12 tubes are specified for high-temperature heat transfer surfaces where oxidation resistance and microstructural stability are critical. * **Superheater & Reheater Tubes:** Intermediate and high-temperature sections in power plant boilers, where steam temperatures are elevated. * **Heat Exchanger Tubes:** For high-temperature services in refineries and petrochemical plants, such as in catalytic reforming, hydroprocessing, and ethylene furnaces. * **Process Heater Tubes:** Radiant and convection section tubes in direct-fired heaters where metal temperatures are high. * **Steam Piping & Headers:** For high-temperature, high-pressure steam lines within its qualified temperature range. * **Boiler Tubes:** For high-pressure applications where oxidation is a concern. **Advantages & Fabrication Notes** * **Weldability with Strict Controls:** Weldable using standard processes, but requires careful procedure due to its alloy content and application: * **Preheat:** Mandatory, typically **350-450°F (177-232°C)** to prevent hydrogen cracking. * **Low-Hydrogen Practice:** Essential (e.g., E8018-B2 or E9018-B3 electrodes for SMAW, depending on PWHT). * **Post-Weld Heat Treatment (PWHT):** **Always required** for pressure-retaining welds. PWHT (e.g., 1250-1350°F / 677-732°C) relieves stresses and tempers the HAZ. **Slow cooling through the 1200-800°F (649-427°C) range is critical to minimize the risk of reheat cracking.** * **Superior Oxidation Resistance:** The ~1% Cr content forms a more adherent and protective chromium-rich oxide scale, reducing metal wastage and the risk of exfoliation in superheaters. * **Microstructural Stability:** Resists graphitization and provides good creep strength due to the molybdenum content and carbide stabilization from chromium. * **Formability:** Good hot formability. Suitable for cold bending with appropriate radii, but post-bending heat treatment (stress relief or full PWHT) is often necessary. * **Code Compliance:** Fully recognized in the **ASME BPVC, Section I** and **Section VIII**, with published allowable stresses up to 1050°F (566°C). It also finds application in refinery services per API RP 939-C guidelines for resistance to HTHA in certain temperature/pressure regimes. **Disclaimer:** This datasheet provides general information on **ASTM A213 T12 / SA-213 T12** alloy steel tubes. For procurement, specify the complete standard, grade (T12), heat treatment, and required NDE. **Design must be based on ASME BPVC allowable stress values.** Welding and PWHT are specialized operations; WPS and procedure qualification records (PQR) per ASME Section IX are mandatory. Special caution is needed regarding **reheat cracking susceptibility**; consulting with a materials/welding engineer is crucial. For services involving hydrogen, a detailed evaluation per **API RP 941 (Nelson Curves)** is required to confirm suitability against HTHA. Material selection and fabrication must be overseen by qualified personnel. -:- For detailed product information, please contact sales. -: ASTM A213 T12 Alloy Steel, Chromium Molybdenum Specification Dimensions Size： Diameter 20-1000 mm Length <4698 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 T12 Alloy Steel, Chromium Molybdenum Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A213 T12 Alloy Steel Wire, Chromium Molybdenum -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A213 T12 Alloy Steel Wire, Chromium Molybdenum -:- For detailed product information, please contact sales. -:

Packing of ASTM A213 T12 Alloy Steel Wire, Chromium Molybdenum -:- 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 Wire 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 1169 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