ASTM A225 Low Alloy Steel, Grade B

ASTM A225 Low Alloy Steel, Grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel, Grade B Synonyms -:- For detailed product information, please contact sales. -:

ASTM A225 Low Alloy Steel, Grade B Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A225 Grade B Steel** **ASTM A225 Grade B** is a manganese-vanadium-nickel alloy steel plate designed as an alternative chemistry variant within the A225 specification. This grade maintains similar mechanical properties to Grade A while offering different chemical composition options, providing manufacturers with flexibility in material selection for fusion welded pressure vessels and structural applications. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A225/A225M** - "Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium-Nickel" **Grade Classification:** - **Grade B** - Alternative chemistry manganese-vanadium-nickel alloy steel - **Grade A** - Standard chemistry variant - **Grade C** - Enhanced properties variant **International Equivalents:** - **EN 10028-3**: 15MnNi6-3 - **JIS G3119**: SPV 410 - **GB/T 713**: 15MnNi - **ISO 9328-3**: 15MnNi6-3 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A225 Grade B: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.22 | | Manganese (Mn) | 1.15-1.60 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.30 | | Vanadium (V) | 0.10-0.20 | | Nickel (Ni) | 0.40-0.70 | **Key Composition Features:** - **Alternative Chemistry**: Different balance from Grade A while maintaining properties - **Manganese-Vanadium System**: Primary strengthening mechanism - **Nickel Enhancement**: Maintains toughness and ductility - **Vanadium Control**: Provides consistent precipitation strengthening --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for thicknesses ≤ 50 mm):** | Property | Value | |---|---| | **Tensile Strength** | 550-690 MPa (80-100 ksi) | | **Yield Strength (min.)** | 345 MPa (50 ksi) | | **Elongation in 2" (min.)** | 18% | | **Elongation in 8" (min.)** | 20% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: -20°F (-29°C) - **Minimum Impact Energy**: 20 ft-lbf (27 J) - **Consistent Toughness**: Maintains reliable fracture resistance **Physical Properties:** - **Density**: 7.86 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 48.3 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C - **Specific Heat Capacity**: 473 J/kg·K --- #### **4. Product Applications** **Pressure Vessel Construction:** - Fusion welded pressure vessels - Boiler components - High-pressure containers - Process industry vessels **Structural Engineering:** - Heavy structural frameworks - Support structures - Industrial building components - Bridge components **Energy and Power:** - Power plant structural members - Energy storage system components - Turbine support structures - Heat exchanger frameworks **Industrial Machinery:** - Heavy equipment frames - Machinery base plates - Industrial platform structures - Material handling equipment --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: Designed for fusion welding applications - **Preheat Requirements**: 150-250°F (65-120°C) based on thickness - **Post-Weld Heat Treatment**: Stress relieving at 1100-1200°F (595-650°C) - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E8018-C3, ER80S-G or equivalent **Forming & Machining:** - **Good Formability**: Suitable for structural forming operations - **Machinability**: Fair (approximately 55% of B1112 steel) - **Cutting Methods**: Plasma, laser, and waterjet cutting - **Bend Characteristics**: Good performance in formed components **Heat Treatment:** - Typically supplied in normalized condition - Normalizing temperature: 1600-1700°F (870-925°C) - Optional tempering available - Consistent response to thermal processing **Quality Assurance:** - **Impact Testing Required**: Charpy V-Notch at specified temperature - **Chemical Certification**: Full heat analysis provided - **Mechanical Testing**: Comprehensive property verification - **Quality Standards**: Meets pressure vessel quality requirements --- ### **Technical Summary** ASTM A225 Grade B provides an alternative chemistry option within the manganese-vanadium-nickel alloy steel series, offering manufacturers flexibility while maintaining the same high performance standards as Grade A. With a minimum yield strength of 50 ksi (345 MPa) and excellent impact properties at -20°F (-29°C), this grade delivers reliable performance for demanding applications. The alternative chemical composition allows for manufacturing flexibility while ensuring consistent mechanical properties and performance characteristics. This makes Grade B particularly valuable for situations where specific chemical requirements or manufacturing processes favor this chemistry variant. Like Grade A, Grade B is specifically engineered for fusion welded applications, exhibiting excellent weldability characteristics that make it suitable for complex pressure vessel fabrication and critical structural components. The material's balanced properties ensure reliable performance in welded constructions while maintaining the required strength and toughness. ASTM A225 Grade B has proven its reliability in various industrial applications, particularly in pressure vessel construction and heavy structural frameworks where the combination of high strength, good toughness, and excellent weldability are essential. Its performance equivalence to Grade A, combined with the flexibility of alternative chemistry, makes it a valuable option for engineers and fabricators in selecting the most appropriate material for specific project requirements. -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel, Grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4340 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 A225 Low Alloy Steel, Grade B Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A225 Low Alloy Steel, Grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A225 Low Alloy Steel, Grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A225 Low Alloy Steel, Grade B -:- 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 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 811 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