ASTM A387 Alloy Steel Sheet,Plate, Grade 2, Class 1

ASTM A387 Alloy Steel Sheet/Plate, Grade 2, Class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel Sheet/Plate, Grade 2, Class 1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A387 Alloy Steel, Grade 2, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A387 Grade 2 Class 1 Steel** **ASTM A387 Grade 2 Class 1** is a chromium-molybdenum alloy steel plate designed for pressure vessel applications requiring improved elevated temperature strength and corrosion resistance compared to carbon steels. This specification covers plates in the annealed or normalized and tempered condition, suitable for welded pressure vessels operating at moderate elevated temperatures. --- #### **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 1** - Annealed or 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: | 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 resistance - **Molybdenum Addition**: 0.45-0.60% for improved creep strength - **Carbon Range**: 0.05-0.21% balanced for strength and weldability - **Silicon Enhancement**: 0.50-0.80% for deoxidation and strength --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Class 1 condition):** | Property | Value | |---|---| | **Tensile Strength** | 415-585 MPa (60-85 ksi) | | **Yield Strength (min.)** | 240 MPa (35 ksi) | | **Elongation in 2" (min.)** | 22% | | **Elongation in 8" (min.)** | 25% | **Elevated Temperature Properties:** - **Maximum Service Temperature**: Up to 470°C (875°F) - **Creep Strength**: Improved over carbon steels - **Oxidation Resistance**: Better than carbon steel grades - **Thermal Stability**: Good property retention at moderate elevated temperatures **Physical Properties:** - **Density**: 7.86 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 49.0 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C - **Specific Heat Capacity**: 480 J/kg·K --- #### **4. Product Applications** **Pressure Vessel Applications:** - Moderate temperature pressure vessels - Process industry equipment - Storage tanks for elevated temperature service - Industrial pressure containers **Power Generation:** - Boiler drums and shells - Feedwater heaters - Low to medium pressure steam components - Power plant auxiliary equipment **Petrochemical Industry:** - Process vessels - Heat exchanger shells - Chemical processing equipment - Refinery auxiliary vessels **Industrial Applications:** - Industrial heating equipment - Thermal processing vessels - Manufacturing pressure vessels - General industrial pressure components --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: With proper procedure control - **Preheat Requirements**: 150-200°C (300-400°F) recommended - **Post-Weld Heat Treatment**: Recommended at 595-650°C (1100-1200°F) - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E7018, ER70S-6 or equivalent **Forming & Machining:** - **Good Formability**: Suitable for most forming operations - **Machinability**: Fair to good (approximately 60% of B1112 steel) - **Cutting Methods**: Plasma, oxy-fuel, and mechanical cutting suitable - **Hot Forming**: Optional for complex shapes **Heat Treatment:** - Supplied in annealed or normalized and tempered condition - Normalizing temperature: 900-925°C (1650-1700°F) - Tempering temperature: 650-705°C (1200-1300°F) - Annealing temperature: 845-875°C (1550-1600°F) **Quality Assurance:** - **Mandatory Testing**: Tensile and chemical analysis - **Impact Testing**: When specified by purchaser - **Hardness Testing**: Typically performed - **Non-Destructive Testing**: As required by application --- ### **Technical Summary** ASTM A387 Grade 2 Class 1 represents an economical chromium-molybdenum alloy steel that provides improved elevated temperature performance over carbon steels while maintaining good fabrication characteristics. The 0.5% chromium and 0.5% molybdenum composition offers enhanced oxidation resistance and creep strength, making it suitable for moderate temperature pressure vessel applications. This grade serves as an excellent intermediate material between carbon steels and higher alloy chromium-molybdenum steels, offering cost-effective performance for applications operating in the temperature range where carbon steels begin to lose significant strength. The Class 1 condition ensures good ductility and toughness, making it suitable for welded construction and various fabrication processes. Grade 2 demonstrates reliable performance in moderate temperature service and shows improved resistance to oxidation and creep compared to carbon steel grades. Its balanced combination of properties, fabrication characteristics, and economic advantages make it a practical choice for pressure vessels in power generation, chemical processing, and industrial applications where moderate elevated temperature capability is required without the need for premium alloy performance. The material's proven service history and cost-effectiveness have established ASTM A387 Grade 2 Class 1 as a reliable solution for engineers designing pressure equipment where both performance requirements and economic considerations are important factors in material selection. -:- For detailed product information, please contact sales. -: ASTM A387 Alloy Steel, Grade 2, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4370 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 1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A387 Alloy Steel Sheet,Plate, Grade 2, Class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A387 Alloy Steel Sheet,Plate, Grade 2, Class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A387 Alloy Steel Sheet/Plate, Grade 2, Class 1 -:- 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 Sheet/Plate 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 841 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