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

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

ASTM A387 Alloy Steel, Grade 2, Class 2 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A387 Grade 2 Class 2 Steel** **ASTM A387 Grade 2 Class 2** is a chromium-molybdenum alloy steel plate supplied in the normalized and tempered condition, offering enhanced mechanical properties for pressure vessel applications requiring improved strength at elevated temperatures. This class provides higher strength levels compared to Class 1 while maintaining good elevated temperature performance. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A387/A387M** - "Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum" **Grade Classification:** - **Grade 2** - 0.5% Chromium - 0.5% Molybdenum alloy steel - **Class 2** - Normalized and tempered condition **International Equivalents:** - **EN 10028-2**: 13CrMo4-5 - **JIS G4109**: SCMV 1 - **GB/T 3077**: 15CrMo - **ISO 9328-2**: 13CrMo4-5 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A387 Grade 2 Class 2: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.05-0.21 | | Manganese (Mn) | 0.55-0.80 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.035 | | Silicon (Si) | 0.50-0.80 | | Chromium (Cr) | 0.50-0.80 | | Molybdenum (Mo) | 0.45-0.60 | **Key Composition Features:** - **Chromium Content**: 0.50-0.80% for moderate oxidation and corrosion resistance - **Molybdenum Enhancement**: 0.45-0.60% for improved creep strength - **Optimized Carbon**: 0.05-0.21% balanced for normalized and tempered condition - **Silicon Control**: 0.50-0.80% for deoxidation and strength enhancement --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Class 2 condition):** | Property | Value | |---|---| | **Tensile Strength** | 515-690 MPa (75-100 ksi) | | **Yield Strength (min.)** | 310 MPa (45 ksi) | | **Elongation in 2" (min.)** | 20% | | **Elongation in 8" (min.)** | 22% | **Elevated Temperature Properties:** - **Maximum Service Temperature**: Up to 470°C (875°F) - **Creep Strength**: Enhanced compared to Class 1 - **Oxidation Resistance**: 2-3 times better than carbon steel - **Thermal Stability**: Good property retention at operating temperatures **Physical Properties:** - **Density**: 7.86 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 48.5 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C - **Specific Heat Capacity**: 475 J/kg·K --- #### **4. Product Applications** **High-Temperature Pressure Vessels:** - Medium pressure vessels for elevated temperature service - Process industry reactors - High-temperature storage tanks - Industrial pressure containers **Power Generation Equipment:** - Boiler drums and components - Steam piping systems - Heat exchanger shells - Power plant pressure parts **Petrochemical Applications:** - Refinery pressure vessels - Chemical process equipment - High-temperature separators - Process industry components **Industrial Applications:** - Industrial heating equipment - Thermal processing vessels - High-temperature manufacturing equipment - General industrial pressure components --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: Requires proper procedure control - **Preheat Requirements**: 175-225°C (350-450°F) recommended - **Post-Weld Heat Treatment**: Recommended at 595-650°C (1100-1200°F) - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E8018-B2, ER80S-B2 or equivalent **Forming & Machining:** - **Moderate Formability**: Suitable for most forming operations - **Machinability**: Fair (approximately 55% of B1112 steel) - **Cutting Methods**: Plasma, laser, and waterjet cutting - **Hot Forming**: Preferred for complex shapes **Heat Treatment:** - Supplied in normalized and tempered condition - Normalizing temperature: 900-925°C (1650-1700°F) - Tempering temperature: 650-705°C (1200-1300°F) - Microstructure: Fine-grained structure for optimal properties **Quality Assurance:** - **Comprehensive Testing**: Tensile, chemical, and impact tests - **Hardness Verification**: Required for quality control - **Impact Testing**: When specified for pressure vessel applications - **Non-Destructive Testing**: As specified by purchaser --- ### **Technical Summary** ASTM A387 Grade 2 Class 2 represents an enhanced version of the chromium-molybdenum alloy steel, offering higher strength levels while maintaining good elevated temperature performance. The normalized and tempered condition provides improved mechanical properties compared to Class 1, making it suitable for more demanding pressure vessel applications. With a minimum yield strength of 45 ksi (310 MPa), Class 2 offers approximately 30% higher strength than Class 1, allowing for more efficient vessel designs and potential material savings in pressure vessel construction. The chromium-molybdenum alloy system provides reliable performance at temperatures up to 470°C (875°F), with improved creep strength and oxidation resistance compared to carbon steels. This grade maintains good fabrication characteristics while offering enhanced mechanical properties, making it a cost-effective solution for applications requiring better performance than carbon steels but where premium high-alloy steels are not economically justified. The material's proven service history in power generation, chemical processing, and industrial applications has established it as a reliable choice for engineers designing pressure equipment where both enhanced mechanical strength and moderate elevated temperature capability are important design considerations. The balanced combination of properties, fabrication characteristics, and economic advantages makes ASTM A387 Grade 2 Class 2 a practical and versatile material selection for a wide range of pressure vessel applications in various industries. -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, Grade 2, Class 2 Specification Dimensions Size： Diameter 20-1000 mm Length <4371 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 2, Class 2 Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A387 Alloy Steel Foil/Strip, Grade 2, 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 842 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