Spherical ASTM A542/A542M Alloy Steel Powder, Chromium Molybdenum

ASTM A542/A542M Alloy Steel Spherical Powder, Chromium Molybdenum Product Information -:- For detailed product information, please contact sales. -: ASTM A542/A542M Alloy Steel Spherical Powder, Chromium Molybdenum Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A542/A542M Alloy Steel Powder, Chromium Molybdenum characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A542/A542M Alloy Steel Powder, Chromium Molybdenum 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 A542/A542M Alloy Steel Powder, Chromium Molybdenum 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 A542/A542M Alloy Steel Powder, Chromium Molybdenum Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A542/A542M Alloy Steel, Chromium Molybdenum Product Information -:- For detailed product information, please contact sales. -: **Product Introduction: ASTM A542/A542M Alloy Steel Plate (Chromium-Molybdenum-Tungsten-Vanadium Steel)** --- ### **1. Overview** ASTM A542/A542M is a specification for **quenched and tempered, high-strength, chromium-molybdenum alloy steel plates** with **tungsten and vanadium additions**, specifically designed for **heavy-wall pressure vessels** operating at **elevated temperatures**. Unlike the more common 2.25Cr-1Mo steels (e.g., A387 Gr.22), A542 steels offer significantly **higher strength at elevated temperatures** and **superior creep-rupture strength**. They are engineered for the most demanding applications where standard Cr-Mo steels are inadequate, such as in modern, high-efficiency power plants and severe petrochemical processes. The specification covers several classes (Types) distinguished by chemical composition and mechanical property requirements. --- ### **2. International Standards** * **Primary Standard:** * **ASTM A542/A542M:** *Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched-and-Tempered, Chromium-Molybdenum-Tungsten.* This is the defining specification. * **ASME SA-542:** The ASME Boiler and Pressure Vessel Code (BPVC) adoption, making it the mandatory specification for code construction (ASME Section VIII, Div. 1 & 2). * **Key Types/Classes & International Equivalents:** The standard defines multiple Types (e.g., Type A, B, C, D, E) and Classes (based on strength level). A commonly referenced high-performance grade is **Type D, Class 4a/4b**, which approximates the advanced **3Cr-1.5Mo-W-V-B** steel. * **EN 10028-2 13CrMoV9-10 / 1.7759:** A similar European plate grade, though not a direct 1:1 equivalent. * **JIS G4109 SCMV 29:** Japanese standard for Cr-Mo-V steel plates for pressure vessels. * This material is often paired with product forms governed by **ASTM A336** (forgings) and **ASTM A213/A335** (tubes/pipes) for corresponding grades. --- ### **3. Chemical Composition (Weight %, Representative for Type D)** The advanced alloying is key to its superior high-temperature performance. | Element | Typical Range (Type D) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 0.10 – 0.15 | Base strength; balanced for weldability and toughness. | | **Manganese (Mn)**| 0.30 – 0.60 | Enhances hardenability and strength. | | **Phosphorus (P)**| ≤ 0.015 | Very low impurity control for enhanced toughness. | | **Sulfur (S)** | ≤ 0.010 | Very low impurity control for improved transverse properties. | | **Silicon (Si)** | 0.10 – 0.35 | Deoxidizer. | | **Chromium (Cr)** | 2.75 – 3.25 | **Primary alloy.** Provides oxidation/corrosion resistance and solid solution strengthening. Higher than A387 Gr.22. | | **Molybdenum (Mo)**| 1.00 – 1.30 | **Primary alloy.** Enhances high-temperature strength and creep resistance. | | **Vanadium (V)** | 0.20 – 0.30 | **Key microalloy.** Forms stable carbides, providing significant **secondary hardening** during tempering and dramatically improving **long-term creep strength**. | | **Tungsten (W)** | 0.40 – 0.70* | **Key alloy.** (In Type D). Adds solid solution strengthening and further improves high-temperature stability. | | **Boron (B)** | 0.001 – 0.003* | (In Type D). Trace addition to markedly increase hardenability in heavy sections. | *(*) Note: Tungsten and Boron are characteristic of advanced grades like Type D.* --- ### **4. Typical Physical & Mechanical Properties (Representative for Type D, Class 4)** * **Tensile Strength:** 620 - 795 MPa (90,000 - 115,000 psi) *[Class 4 typical range]* * **Yield Strength (0.2% Offset):** ≥ 515 MPa (75,000 psi) *[Minimum for Class 4]* * **Elongation (% in 50mm):** ≥ 16% *[Minimum]* * **Hardness:** Typically 210 - 250 HB in quenched & tempered condition. * **Density:** ~ 7.87 g/cm³. * **Modulus of Elasticity:** ~ 200 GPa at room temperature. * **Thermal Conductivity:** Slightly lower than standard Cr-Mo steels due to higher alloy content, ~ 35 W/m·K (at 100°C). * **Critical High-Temperature Performance:** * **Maximum Service Temperature:** Suitable for sustained operation up to **~625°C (1150°F)**. * **Superior Creep Strength:** Its principal advantage is **outstanding creep and stress-rupture resistance** at temperatures above 550°C (1022°F), far exceeding that of 2.25Cr-1Mo steels. * **Oxidation Resistance:** Better than lower chromium grades due to ~3% Cr content. --- ### **5. Product Application** A542 steels are reserved for the most critical, high-parameter components where failure is not an option. * **Advanced Ultra-Supercritical (USC) & Supercritical Power Plants:** * **High-Pressure Steam Drums and Headers** (for the hottest sections). * **Main Steam Lines and Piping.** * **Turbine Casing Components.** * **Petrochemical & Hydroprocessing:** * **Heavy-Wall Reactors** for severe hydrocracking and hydrotreating service, especially where **very high hydrogen partial pressures and temperatures** exceed the limits of standard 2.25Cr-1Mo steels. * **Hot High-Pressure Separators.** * **Synthesis & Ammonia Plants:** For critical high-temperature/pressure vessels. --- ### **6. Key Features & Advantages** * **Exceptional Creep-Rupture Strength:** The primary reason for selection. The V, W, and Mo combination provides unmatched long-term load-bearing capability at temperatures above 550°C. * **High Design Strength:** Allows for **thinner vessel walls** compared to lower-strength materials at the same pressure, reducing weight, material cost, and thermal stress. * **Enhanced Hydrogen Resistance:** The higher alloy content provides better resistance to high-temperature hydrogen attack (HTHA) under more severe conditions than Grade 22. * **Heavy-Section Hardenability:** Boron addition ensures uniform through-thickness properties in very thick plates (often > 150mm). * **Required Condition:** Supplied in the **quenched and tempered (Q&T)** condition, which is essential to develop its full suite of high-strength and toughness properties. --- **In summary, ASTM A542/A542M represents the pinnacle of conventional quenched & tempered alloy steel plate technology for pressure vessels. It is a specialized, high-performance material selected for extreme service conditions—particularly where superior elevated temperature strength and creep resistance are paramount—enabling advanced, efficient, and reliable designs in power generation and petrochemical processing.** -:- For detailed product information, please contact sales. -: ASTM A542/A542M Alloy Steel, Chromium Molybdenum Specification Dimensions Size： Diameter 20-1000 mm Length <7013 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 A542/A542M Alloy Steel, Chromium Molybdenum Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A542/A542M Alloy Steel Powder, Chromium Molybdenum Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A542/A542M Alloy Steel Powder, Chromium Molybdenum -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A542/A542M Alloy Steel Spherical Powder, Chromium Molybdenum -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A542/A542M Alloy Steel Spherical Powder, Chromium Molybdenum -:- For detailed product information, please contact sales. -:

Packing of ASTM A542/A542M Alloy Steel Spherical Powder, 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 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 3484 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