ASTM A533 Low Alloy Steel Tube,Pipe, Grade B, Class 1

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

ASTM A533 Low Alloy Steel, Grade B, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A533 Grade B Class 1: High-Toughness Quenched and Tempered Alloy Steel Plate** #### **1. Overview** ASTM A533 Grade B Class 1 is a **nickel-alloyed**, quenched and tempered steel plate within the ASTM A533 specification, characterized by its **enhanced toughness** at low temperatures compared to Grade A. This grade is specifically designed for nuclear pressure vessels and other critical applications where superior fracture toughness is required, particularly in low-temperature service conditions. The increased nickel content significantly improves the material's impact properties while maintaining adequate strength. #### **2. Chemical Composition** Grade B features higher nickel content for improved toughness: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.25 max | | Manganese (Mn) | 1.15 - 1.50 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 1.10 - 1.50 | | Molybdenum (Mo) | 0.45 - 0.60 | **Key Composition Features:** - **Higher Nickel (1.10-1.50%)**: Significantly enhances low-temperature toughness - **Elevated Manganese (1.15-1.50%)**: Improves hardenability in thick sections - **Controlled Carbon**: Maintains weldability while providing strength - **Low Impurity Elements**: Ensures cleanliness and fracture resistance #### **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) | **Thickness Capability:** - Maximum thickness: 14 inches (355 mm) - Excellent through-thickness properties - Minimal property degradation in heavy sections **Physical Properties (Typical):** - **Density:** 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Thermal Conductivity:** 29.5 W/m·K at 100°C - **Specific Heat:** 460 J/kg·K at 100°C #### **4. Product Applications** Grade B Class 1 is preferred for applications requiring exceptional toughness: **Nuclear Power Components:** - Reactor pressure vessels (primary circuit) - Nuclear containment systems - Pressurizers and steam generators - Safety-related components **Low-Temperature Service:** - Cryogenic pressure vessels - LNG storage and processing equipment - Low-temperature chemical reactors - Arctic service structures **High-Pressure Applications:** - Heavy-wall hydrogen reactors - Ammonia and methanol converters - High-pressure gas storage vessels - Critical process equipment #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 12Ni14 | Similar nickel content | | **Europe** | **EN 10028-2** | 12Ni14 | Comparable properties | | **Japan** | **JIS G3120** | SOV 3B | Nuclear quality equivalent | | **Germany** | **DIN 17155** | 12Ni14 | Historical designation | **Grade A vs Grade B Comparison:** | Parameter | Grade A | Grade B | |-----------|---------|---------| | **Nickel Content** | 0.70-1.00% | 1.10-1.50% | | **Manganese Content** | 0.95-1.30% | 1.15-1.50% | | **Low-Temperature Toughness** | Good | Excellent | #### **6. Fabrication & Quality Assurance** **Welding Characteristics:** - **Excellent weldability** due to controlled carbon equivalent - **Pre-heat requirements:** 300-400°F (150-200°C) - **Post-weld heat treatment:** 1100-1150°F (595-620°C) - **Welding processes:** SMAW, SAW, GTAW with matching strength electrodes **Heat Treatment:** - **Austenitizing:** 1600-1650°F (870-900°C) - **Quenching:** Accelerated cooling in water or polymer - **Tempering:** 1150-1250°F (620-675°C) - **Stress Relieving:** As required by fabrication sequence **Quality Control Requirements:** - **Ultrasonic testing:** Per ASTM A578 Level II or higher - **Impact testing:** Multiple locations and orientations - **Tensile testing:** Longitudinal and transverse directions - **Chemical analysis:** Each heat with product analysis verification --- **Key Advantages:** - **Superior fracture toughness** at low temperatures - **Excellent radiation resistance** for nuclear applications - **Consistent properties** in heavy sections - **Proven performance** in critical service **Design Considerations:** - **Fracture mechanics analysis** for defect tolerance assessment - **Neutron irradiation effects** in nuclear applications - **Thermal stress considerations** in thick sections - **Fatigue crack growth** behavior in cyclic service **Disclaimer:** This information is for reference purposes. For nuclear applications, compliance with ASME Section III and applicable regulatory requirements is mandatory. All fabrication activities must be performed under qualified procedures and supervised by experienced engineers. -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel, Grade B, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4426 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 B, Class 1 Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A533 Low Alloy Steel Tube, Grade B, 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 897 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