ASTM A542 Low Alloy Steel Tube,Pipe, Grade A, Class 1

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

ASTM A542 Low Alloy Steel, Grade A, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A542 Grade A Class 1: Pressure Vessel Alloy Steel Plate** #### **1. Overview** ASTM A542 Grade A Class 1 is a **chromium-molybdenum alloy steel plate** specifically designed for **pressure vessel applications** requiring enhanced elevated temperature properties and corrosion resistance. This steel is supplied in the **quenched and tempered condition** to achieve optimal combination of high strength, good toughness, and excellent creep resistance, making it particularly suitable for high-temperature service in petroleum refineries and power generation industries. #### **2. Chemical Composition** The chemical composition is carefully balanced for 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) | 1.00 - 1.50 | | Molybdenum (Mo) | 0.45 - 0.60 | **Key Composition Features:** - **Low Carbon Content**: Ensures good weldability and toughness - **Chromium Addition**: Provides oxidation and corrosion resistance - **Molybdenum Enhancement**: Improves high-temperature strength and creep resistance - **Controlled Manganese**: Maintains hardenability without compromising fabricability #### **3. Physical & Mechanical Properties** **Mechanical Properties (Quenched & Tempered Condition):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 75 - 95 ksi (515 - 655 MPa) | | **Yield Strength** | 50 ksi min (345 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 Properties:** - **Creep Strength**: Excellent resistance to deformation at high temperatures - **Oxidation Resistance**: Good performance up to 1100°F (595°C) - **Thermal Stability**: Maintains properties during long-term exposure **Physical Properties (Typical):** - **Density**: 0.283 lb/in³ (7,830 kg/m³) - **Modulus of Elasticity**: 29,500 ksi (203 GPa) at room temperature - **Thermal Expansion**: 6.2 × 10⁻⁶/°F (11.2 × 10⁻⁶/°C) at 68-1000°F - **Thermal Conductivity**: 26.5 W/m·K at 212°F (100°C) #### **4. Product Applications** ASTM A542 Grade A Class 1 is specified for demanding high-temperature applications: **Petroleum Refining:** - Hydrocracking reactors - Hydrotreating vessels - Catalytic converters - High-pressure high-temperature process vessels **Power Generation:** - Steam drums and headers - High-pressure piping systems - Boiler components - Heat exchangers **Chemical Processing:** - High-temperature reactors - Pressure vessels for corrosive service - Synthesis converters - Process equipment for elevated temperature service #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 13CrMo4-5 | Similar chromium-molybdenum steel | | **Europe** | **EN 10028-2** | 13CrMo4-5 | Close equivalent for pressure vessels | | **Japan** | **JIS G4109** | SCMV 4 | Chromium-molybdenum steel equivalent | | **Germany** | **DIN 17155** | 13CrMo44 | Historical designation | **Grade Classification Comparison:** | Parameter | Grade A Class 1 | Grade B Class 1 | Grade C Class 1 | |-----------|-----------------|-----------------|-----------------| | **Cr Content** | 1.00-1.50% | 2.00-2.50% | 2.75-3.25% | | **Mo Content** | 0.45-0.60% | 0.90-1.10% | 0.90-1.10% | | **Application** | Moderate Temperature | High Temperature | Very High Temperature | #### **6. Fabrication & Quality Assurance** **Welding Considerations:** - **Pre-heat requirement**: 300-400°F (150-200°C) - **Post-weld heat treatment**: Mandatory at 1100-1250°F (595-675°C) - **Welding consumables**: Must match base metal composition - **Procedure qualification**: Essential for all welding operations **Heat Treatment:** - **Austenitizing**: 1650-1700°F (900-925°C) - **Quenching**: Accelerated cooling required - **Tempering**: 1150-1300°F (620-705°C) - **Stress relieving**: As specified by design requirements **Quality Control:** - **Impact testing**: Required at specified temperatures - **Tension tests**: From each heat treatment charge - **Ultrasonic examination**: Available as supplementary requirement - **Hardness testing**: Often specified for quality verification --- **Technical Advantages:** - **Excellent high-temperature strength** - **Good corrosion and oxidation resistance** - **Superior creep resistance** - **Good fabricability and weldability** **Design Considerations:** - **Elevated temperature design rules** per ASME Section VIII Division 2 - **Creep and rupture strength** considerations for long-term service - **Thermal cycling** effects on material performance - **Environmental factors** affecting corrosion resistance **Application Guidelines:** - Suitable for **ASME Section I** power boiler applications - Appropriate for **ASME Section VIII** pressure vessel construction - Recommended for **high-temperature hydrogen service** - Compatible with **refinery and petrochemical processes** **Disclaimer:** This information is for technical reference only. For high-temperature pressure vessel applications, consult the latest ASTM A542 specification and applicable construction codes. Material selection and fabrication must comply with ASME Boiler and Pressure Vessel Code requirements and be approved by qualified engineers. -:- For detailed product information, please contact sales. -: ASTM A542 Low Alloy Steel, Grade A, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4437 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 A, Class 1 Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A542 Low Alloy Steel Tube, Grade A, 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 Tube 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 908 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