ASTM A542 Low Alloy Steel Capillary, Grade C, Class 1

ASTM A542 Low Alloy Steel Capillary, Grade C, Class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A542 Low Alloy Steel Capillary, Grade C, Class 1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A542 Low Alloy Steel, Grade C, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A542 Grade C Class 1: High-Temperature 3Cr-1Mo Steel Plate** #### **1. Overview** ASTM A542 Grade C Class 1 is a **quenched and tempered 3% chromium-1% molybdenum alloy steel plate** designed for **superior high-temperature performance** in severe service applications. This grade represents a significant advancement over Grade B materials, offering enhanced resistance to high-temperature hydrogen attack, improved oxidation resistance, and superior creep strength, making it ideal for the most demanding refinery, petrochemical, and power generation applications. #### **2. Chemical Composition** The chemical composition is optimized for maximum high-temperature performance: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.15 max | | Manganese (Mn) | 0.30 - 0.60 | | Phosphorus (P) | 0.025 max | | Sulfur (S) | 0.025 max | | Silicon (Si) | 0.15 - 0.40 | | Chromium (Cr) | 2.75 - 3.25 | | Molybdenum (Mo) | 0.90 - 1.10 | **Enhanced Composition Features:** - **Higher Chromium Content (2.75-3.25%)**: Provides superior oxidation and corrosion resistance - **Enhanced Molybdenum (0.90-1.10%)**: Ensures excellent high-temperature strength and stability - **Controlled Carbon Content**: Maintains optimal weldability and toughness - **Balanced Manganese-Silicon**: Optimizes deoxidation and mechanical properties #### **3. Physical & Mechanical Properties** **Mechanical Properties (Quenched & Tempered Condition):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 75 - 95 ksi (515 - 655 MPa) | | **Yield Strength** | 45 ksi min (310 MPa min) | | **Elongation in 2 inches** | 18% min | | **Reduction of Area** | 45% min | | **Charpy V-Notch Impact** | 40 ft-lb min at -50°F (-46°C) | **Elevated Temperature Performance:** - **Exceptional Creep Strength**: Outstanding performance at temperatures up to 1200°F (650°C) - **Superior Hydrogen Resistance**: Enhanced resistance to hydrogen attack per API 941 - **Excellent Oxidation Resistance**: Superior performance in high-temperature environments - **Thermal Stability**: Maintains microstructural integrity during long-term exposure **Physical Properties (Typical):** - **Density**: 0.281 lb/in³ (7,780 kg/m³) - **Modulus of Elasticity**: 29,500 ksi (203 GPa) at 70°F (21°C) - **Thermal Expansion Coefficient**: 6.1 × 10⁻⁶/°F (11.0 × 10⁻⁶/°C) from 70-1000°F - **Thermal Conductivity**: 24.5 W/m·K at 212°F (100°C) #### **4. Product Applications** Grade C Class 1 is specified for advanced high-temperature hydrogen service applications: **Petroleum Refining:** - High-temperature hydrocracking reactors - Severe service hydrotreating vessels - Hydrogen reactors with elevated temperatures - Advanced refinery conversion units **Power Generation:** - High-temperature steam drums - Advanced boiler components - High-pressure piping systems - Critical heat exchanger applications **Chemical Processing:** - High-temperature chemical reactors - Synthesis gas converters - Severe service process vessels - Advanced petrochemical equipment #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 12CrMo9-10 | Similar chromium-molybdenum steel | | **Europe** | **EN 10028-2** | 12CrMo9-10 | Close equivalent for pressure vessels | | **Japan** | **JIS G4109** | SCMV 4 | Chromium-molybdenum steel equivalent | | **Germany** | **DIN 17155** | 12CrMo910 | Historical designation | **Grade Comparison:** | Parameter | Grade B | Grade C | |-----------|---------|---------| | **Chromium Content** | 2.00-2.50% | 2.75-3.25% | | **Molybdenum Content** | 0.90-1.10% | 0.90-1.10% | | **Oxidation Resistance** | Very Good | Excellent | | **Maximum Service Temperature** | 1200°F (650°C) | 1250°F (675°C) | #### **6. Fabrication & Quality Assurance** **Welding and Fabrication:** - **Pre-heat requirement**: 300-400°F (150-200°C) minimum - **Post-weld heat treatment**: Mandatory at 1300-1400°F (705-760°C) - **Welding consumables**: Must match base metal composition - **Procedure qualification**: Essential for all welding operations **Heat Treatment Protocol:** - **Austenitizing**: 1650-1750°F (900-955°C) - **Quenching**: Accelerated cooling required - **Tempering**: 1300-1450°F (705-785°C) - **Microstructural requirements**: Fully tempered microstructure **Quality Control Requirements:** - **Impact testing**: Required at specified temperatures - **Tension tests**: From each heat treatment charge - **Ultrasonic examination**: Available as supplementary requirement - **Hardness testing**: Typically 180-220 HBW --- **Technical Advantages:** - **Enhanced high-temperature strength** - **Superior resistance to hydrogen attack** - **Excellent oxidation and corrosion resistance** - **Outstanding creep and rupture properties** **Design Considerations:** - **ASME Section VIII Division 1** design rules applicable - **Advanced creep life assessment** essential - **Hydrogen service evaluation** per API 941 - **Environmental factors** consideration **Service Limitations:** - **Maximum design temperature**: 1250°F (675°C) for continuous service - **Minimum design temperature**: -50°F (-46°C) based on impact requirements - **Hydrogen partial pressure limitations**: Per API 941 Nelson Curve - **Oxidation considerations**: Based on service environment **Disclaimer:** This information is for technical reference only. For high-temperature pressure vessel applications involving hydrogen service, consult the latest ASTM A542 specification and applicable ASME Code requirements. Material selection and fabrication must comply with API 941 recommendations and be approved by qualified engineers with experience in high-temperature hydrogen service applications. -:- For detailed product information, please contact sales. -: ASTM A542 Low Alloy Steel, Grade C, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4447 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 Low Alloy Steel, Grade C, Class 1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A542 Low Alloy Steel Capillary, Grade C, Class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A542 Low Alloy Steel Capillary, Grade C, Class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A542 Low Alloy Steel Capillary, Grade C, 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 Capillary 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 918 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