Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24)

ASTM A213 T22 2.25Cr-1Mo Steel Spherical Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Product Information -:- For detailed product information, please contact sales. -: ASTM A213 T22 2.25Cr-1Mo Steel Spherical Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A213 T22 2.25Cr-1Mo STEEL FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Product Information -:- For detailed product information, please contact sales. -: **Product Introduction: ASTM A213 T22 / 2.25Cr-1Mo Alloy Steel for Boiler and Heat Exchanger Seamless Tubes** --- ### **1. Overview** ASTM A213 T22 is a high-strength, seamless ferritic alloy steel tube engineered for superior performance in high-temperature and high-pressure environments. It belongs to the chromium-molybdenum (Cr-Mo) family, with a nominal composition of **2.25% Chromium and 1% Molybdenum**, which provides enhanced oxidation resistance, creep strength, and structural stability at elevated temperatures compared to lower-alloy grades like T11. The designation **STBA 24** refers to its equivalent material code under the Japanese Industrial Standard (JIS G 3462), commonly used in power plant and boiler applications. T22 is a fundamental material in the construction of critical heat transfer and pressure-containing components. --- ### **2. International Standards** This material is governed by a key international standard and recognized across major global codes: * **Primary Standard (Tubes):** * **ASTM A213/A213M:** *Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.* This is the core specification for the tubular product. * **Equivalent & Related Standards:** * **ASME SA-213:** The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC) version of ASTM A213, making it mandatory for code-compliant construction in the USA and many other countries. * **JIS G 3462 STBA 24:** The Japanese Industrial Standard specification for steel tubes for boilers and heat exchangers. STBA 24 is the direct equivalent of T22. * **EN 10216-2 10CrMo9-10:** The European standard for seamless pressure tubes. The grade 10CrMo9-10 (1.7380) is a closely comparable material. * **DIN 17175 10CrMo9-10:** The German standard for heat-resistant steels. * **ASTM A335 P22 / ASME SA-335 P22:** The equivalent specification for **seamless pipe** (as opposed to tube), used for high-temperature piping systems. --- ### **3. Chemical Composition (Weight %, per ASTM A213)** The balanced chemistry is the source of T22's high-temperature capabilities: | Element | Composition (%) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 0.05 – 0.15 | Base strength and hardness. | | **Manganese (Mn)**| 0.30 – 0.60 | Enhances strength and hardenability. | | **Phosphorus (P)**| ≤ 0.025 | Impurity, controlled for toughness. | | **Sulfur (S)** | ≤ 0.025 | Impurity, controlled for weldability. | | **Silicon (Si)** | ≤ 0.50 | Deoxidizer, improves strength and oxidation resistance. | | **Chromium (Cr)** | 1.90 – 2.60 | **Key alloy.** Provides oxidation/sulfidation resistance and strengthens the steel matrix. | | **Molybdenum (Mo)**| 0.87 – 1.13 | **Key alloy.** Dramatically improves high-temperature strength and creep resistance. | --- ### **4. Typical Physical & Mechanical Properties** *(For normalized and tempered condition, typical for service)* * **Tensile Strength:** ≥ 415 MPa (60,000 psi) * **Yield Strength (0.2% Offset):** ≥ 205 MPa (30,000 psi) * **Elongation (% in 50mm / 2in):** ≥ 30% * **Hardness:** Typically ≤ 163 HB (Brinell) * **Density:** ~ 7.85 g/cm³ * **Melting Point:** ~ 1420 – 1510 °C (2590 – 2750 °F) * **Thermal Conductivity:** ~ 36 W/m·K (at 100°C) * **Specific Heat:** ~ 460 J/kg·K (at 100°C) * **Coefficient of Thermal Expansion:** ~ 12.0 x 10⁻⁶ /K (20-100°C) * **Maximum Recommended Service Temperature:** Exhibits excellent oxidation resistance up to **~595°C (1100°F)** and good creep strength up to **~565°C (1050°F)**. --- ### **5. Product Application** ASTM A213 T22 / STBA 24 tubes are the workhorse material for demanding thermal applications across several critical industries: * **Fossil Fuel Power Plants:** * **Superheater & Reheater Tubes:** Where steam reaches its highest temperatures and pressures. * **Boiler Tubes:** In high-heat sections of water-tube boilers. * **Heat Exchanger Tubes:** In economizers and other feedwater heaters. * **Petrochemical & Refining:** * **Heater Tubes & Coils:** In direct-fired heaters and process furnaces. * **Catalyst & Transfer Lines:** For hot process streams. * **Heat Exchanger Tubing:** In high-temperature service. * **Chemical Processing Plants:** For equipment involving high-temperature reactions and heat recovery. * **Pressure Vessel Shells & Components:** When designed for elevated temperature service. --- ### **6. Key Features & Advantages** * **Superior High-Temperature Properties:** Offers a significant performance leap over T11/T12 grades, with better oxidation resistance and creep strength. * **Excellent Weldability:** Although it requires proper pre-heat and post-weld heat treatment (PWHT), it is well-known and readily weldable using established procedures for Cr-Mo steels. * **Microstructural Stability:** Resists graphitization and retains toughness over long-term exposure at high temperatures. * **Proven Reliability:** Decades of successful service history in power generation globally, making it a trusted and well-understood material. * **Cost-Performance Balance:** Provides an optimal balance between performance and cost, sitting between lower-alloy steels and more expensive high-alloy austenitic steels. --- **In summary, ASTM A213 T22 (2.25Cr-1Mo / STBA 24) is a premier, industry-standard alloy steel for seamless tubes, chosen for its robust combination of high-temperature strength, oxidation resistance, and fabricability. It is essential for the safe and efficient operation of boilers, heat exchangers, and pressure equipment in the most demanding thermal environments.** -:- For detailed product information, please contact sales. -: ASTM A213 T22 2.25Cr-1Mo STEEL FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Specification Dimensions Size： Diameter 20-1000 mm Length <7011 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 T22 2.25Cr-1Mo STEEL FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A213 T22 2.25Cr-1Mo Steel Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A213 T22 2.25Cr-1Mo Steel Spherical Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A213 T22 2.25Cr-1Mo Steel Spherical Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) -:- For detailed product information, please contact sales. -:

Packing of ASTM A213 T22 2.25Cr-1Mo Steel Spherical Powder FOR BOILER AND HEAT EXCHANGER SEAMLESS TUBES (STBA 24) -:- 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 Spherical Powder 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 3482 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