ASTM A533 Low Alloy Steel Rod/Bar, Grade A, Class 1

ASTM A533 Low Alloy Steel Rod, Grade A, Class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel Rod, Grade A, Class 1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A533 Low Alloy Steel, Grade A, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A533 Grade A Class 1: High-Strength Quenched and Tempered Alloy Steel Plate** #### **1. Overview** ASTM A533 is a standard specification for **pressure vessel plates**, alloy steel, quenched and tempered. **Grade A, Class 1** is a specific category within this specification, designed to provide exceptional **strength and toughness** for critical applications, particularly in nuclear and heavy-wall pressure vessels. This steel undergoes rigorous heat treatment (quenching and tempering) to achieve a fine-grained microstructure that delivers superior mechanical properties and reliable performance in demanding service environments. #### **2. Chemical Composition** The chemical composition is carefully balanced to achieve high hardenability and excellent toughness in thick sections. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.25 max | | Manganese (Mn) | 0.95 - 1.30 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 0.70 - 1.00 | | Molybdenum (Mo) | 0.45 - 0.60 | | Copper (Cu) | 0.25 max (when specified) | **Key Alloying Roles:** - **Nickel-Molybdenum Combination:** Provides deep hardenability and enhances toughness - **Controlled Carbon:** Balances strength and weldability - **Manganese:** Increases hardenability and strength - **Low Impurities:** Restricted phosphorus and sulfur improve toughness #### **3. Physical & Mechanical Properties** **Mechanical Properties (Up to 2½ inches / 63 mm thickness):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 80 - 100 ksi (550 - 690 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 -75°F (-60°C) | **Physical Properties (Typical):** - **Density:** 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Poisson's Ratio:** 0.29 - **Thermal Expansion Coefficient:** 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) #### **4. Product Applications** ASTM A533 Grade A Class 1 is primarily used in critical applications requiring exceptional reliability: **Nuclear Power Industry:** - Reactor pressure vessels - Nuclear containment structures - Steam generators and pressurizers - Primary coolant system components **Pressure Vessel Applications:** - Heavy-wall chemical reactors - High-pressure storage vessels - Hydrocracking units in refineries - Large-diameter high-pressure piping **Specialized Equipment:** - Heavy construction machinery - Mining equipment components - Research and test facilities #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 13MnNiMo5-4 | Similar chemistry and properties | | **Europe** | **EN 10028-2** | 13MnNiMo5-4 | Close equivalent for pressure vessels | | **Japan** | **JIS G3120** | SOV 2A | Similar application scope | | **Germany** | **DIN 17155** | 13MnNiMo54 | Historical equivalent | **Key International Comparisons:** - **European EN 10028-2:** 13MnNiMo5-4 offers similar strength and toughness - **Japanese JIS G3120:** SOV series provides comparable nuclear applications - **Chinese GB/T 30062:** Similar alloy steel plates for pressure vessels #### **6. Fabrication & Welding Considerations** **Heat Treatment:** - Supplied in quenched and tempered condition - Post-weld heat treatment typically required - Maximum tempering temperature: 1150°F (621°C) **Welding Requirements:** - Low-hydrogen welding processes mandatory - Pre-heat and interpass temperature control critical - Post-weld heat treatment essential for stress relief - Welding procedures must be qualified per ASME Section IX **Quality Assurance:** - Strict non-destructive testing requirements - Ultrasonic examination per ASTM A578 - Impact testing at specified temperatures - Chemical analysis and mechanical testing for each heat --- **Special Notes:** - **Nuclear Certification:** Often supplied with supplementary requirements for nuclear applications - **Traceability:** Complete material traceability required for critical applications - **Quality Documentation:** Certified Material Test Reports (CMTR) with full traceability **Disclaimer:** This information is for reference purposes only. For nuclear and other critical applications, consult the latest ASTM A533 standard and applicable nuclear codes (ASME Section III). Material selection should be made in consultation with qualified materials engineers. -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel, Grade A, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4423 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 A533 Low Alloy Steel, Grade A, Class 1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A533 Low Alloy Steel Rod, Grade A, Class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A533 Low Alloy Steel Rod, Grade A, Class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A533 Low Alloy Steel Rod, 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 Rod 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 894 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