ASTM A387 Alloy Steel Foil/Strip, Grade 7, Class 2

ASTM A387 Alloy Steel Foil, Grade 7, Class 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel Foil, Grade 7, Class 2 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A387 Alloy Steel, Grade 7, Class 2 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A387/A387M Alloy Steel, Grade 7, Class 2** **1. Overview** ASTM A387 Grade 7 Class 2 is a chromium-molybdenum (Cr-Mo) alloy steel plate specifically designed for service in welded pressure vessels and other high-temperature applications. This grade is known for its excellent strength and resistance to oxidation and corrosion at elevated temperatures, typically up to about 600°C (1112°F). The "Class 2" designation indicates that the material is supplied in the normalized and tempered heat treatment condition, which provides an optimal combination of high strength and good toughness. **2. Key International Standards** * **Primary Standard:** **ASTM A387/A387M** - Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum. * This standard covers the chemical, mechanical, and heat treatment requirements. * **Dimensional Standards:** * **ASTM A20/A20M** - Standard Specification for General Requirements for Steel Plates for Pressure Vessels. This provides supplementary requirements for testing, inspection, tolerances, etc. * **Equivalent Standards:** * **EN / DIN:** 16Mo3 (A comparable European grade, though not an exact equivalent). * **JIS:** SCMV 28 (Japanese standard for Cr-Mo steel for pressure vessels). **3. Chemical Composition (Weight %)** The chemical composition is a critical factor in achieving the desired high-temperature properties. The ladle analysis must conform to the following limits: | Element | Composition (%) | | :--- | :--- | | Carbon (C) | 0.05 - 0.17 | | Manganese (Mn) | 0.40 - 0.65 | | Phosphorus (P), max | 0.025 | | Sulfur (S), max | 0.025 | | Silicon (Si) | 0.50 - 0.80 | | Chromium (Cr) | 1.90 - 2.60 | | Molybdenum (Mo) | 0.87 - 1.13 | *Note: Trace elements may be restricted by customer requirements or supplementary standards.* **4. Mechanical & Physical Properties** The mechanical properties are guaranteed in the normalized and tempered condition. **Mechanical Properties (at room temperature):** | Property | Value | | :--- | :--- | | Tensile Strength | 485 - 620 MPa (70 - 90 ksi) | | Yield Strength (min) | 275 MPa (40 ksi) | | Elongation in 2 in. (50 mm), (min) | 22% | | **Hardness (typical)** | **~145-190 HB** | **Approximate Physical Properties:** * **Density:** 7.86 g/cm³ (0.284 lb/in³) * **Melting Point:** ~ 1425 - 1520 °C (2600 - 2770 °F) * **Modulus of Elasticity:** 200 GPa (29 x 10⁶ psi) * **Thermal Conductivity:** ~ 36.0 W/m·K (at 100°C) * **Coefficient of Thermal Expansion:** ~ 11.5 x 10⁻⁶ /K (20-100°C) *Note: Physical properties can vary with temperature and should be verified for specific design calculations.* **5. Product Applications** ASTM A387 Gr 7 Cl 2 is predominantly used in the construction of pressure vessels and components that operate in high-temperature and/or high-pressure hydrogen service. Its key applications include: * **Petroleum Refining:** Hydrocracking reactors, hydrotreating reactors, and high-pressure separators. * **Chemical & Petrochemical Plants:** Reactors and vessels exposed to corrosive environments at elevated temperatures. * **Power Generation:** Boiler drums, steam drums, and high-temperature pressure parts in fossil fuel power plants. * **Oil & Gas Industry:** Equipment for synthesis gas and ammonia production. **6. Key Characteristics & Advantages** * **High-Temperature Strength:** Maintains structural integrity and creep resistance under sustained loads at high temperatures. * **Hydrogen Resistance:** The chromium and molybdenum content provides good resistance to hydrogen embrittlement and hydrogen attack (as defined by the Nelson Curve in API RP 941). * **Weldability:** It has good weldability, though it requires pre-heating and post-weld heat treatment (PWHT) to prevent cracking and restore the mechanical properties in the heat-affected zone (HAZ). * **Toughness:** The normalized and tempered heat treatment ensures a fine-grained microstructure with adequate toughness. In summary, **ASTM A387 Grade 7 Class 2** is a high-performance, heat-treated chromium-molybdenum alloy steel plate that is an industry standard for critical high-temperature and high-pressure applications in the energy and chemical processing sectors. --- -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, Grade 7, Class 2 Specification Dimensions Size： Diameter 20-1000 mm Length <4375 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 A387 Alloy Steel, Grade 7, Class 2 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A387 Alloy Steel Foil, Grade 7, Class 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A387 Alloy Steel Foil, Grade 7, Class 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A387 Alloy Steel Foil/Strip, Grade 7, Class 2 -:- 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 Foil/Strip 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 846 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