ASTM A225 Low Alloy Steel Rod/Bar, Grade A

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

ASTM A225 Low Alloy Steel, Grade A Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A225 Grade A Steel** **ASTM A225 Grade A** is a manganese-vanadium-nickel alloy steel plate specifically designed for fusion welded pressure vessels and other critical applications requiring enhanced strength and toughness. This grade offers an excellent combination of high strength, good weldability, and superior impact properties, making it suitable for demanding structural and pressure-containing components. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A225/A225M** - "Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium-Nickel" **Grade Classification:** - **Grade A** - Standard manganese-vanadium-nickel alloy steel - **Grade B** - Alternative 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 A: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.20 | | 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:** - **Manganese-Vanadium System**: Primary strengthening mechanism - **Nickel Addition**: Enhances toughness and ductility - **Vanadium Content**: Provides precipitation strengthening - **Balanced Chemistry**: Optimized for weldability and strength --- #### **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) - **Excellent Toughness**: Good fracture resistance at low temperatures **Physical Properties:** - **Density**: 7.86 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 48.5 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C - **Specific Heat Capacity**: 475 J/kg·K --- #### **4. Product Applications** **Pressure Vessel Applications:** - Fusion welded pressure vessels - Boiler drums and shells - High-pressure storage tanks - Process reactors **Structural Components:** - Heavy structural supports - Crane and machinery frames - Industrial equipment bases - Structural connections **Energy Sector:** - Power plant components - Heat exchanger supports - Turbine foundations - Energy storage systems **Industrial Equipment:** - Heavy machinery components - Mining equipment structures - Material handling systems - Industrial platform supports --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: Specifically designed for fusion welding - **Preheat Requirements**: 150-250°F (65-120°C) depending on thickness - **Post-Weld Heat Treatment**: Stress relieving recommended - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E8018-C3, ER80S-G or equivalent **Forming & Machining:** - **Good Formability**: Suitable for most forming operations - **Machinability**: Fair (approximately 55% of B1112 steel) - **Cutting Methods**: Plasma, laser, and waterjet cutting - **Bend Performance**: Good for structural applications **Heat Treatment:** - Typically supplied in normalized condition - Normalizing temperature: 1600-1700°F (870-925°C) - Optional tempering for specific requirements - Good response to thermal processing **Quality Assurance:** - **Mandatory Impact Testing**: Charpy V-Notch at specified temperature - **Chemical Analysis**: Heat certification required - **Mechanical Testing**: Tensile tests from each heat - **Non-Destructive Testing**: As specified by purchaser --- ### **Technical Summary** ASTM A225 Grade A represents a sophisticated manganese-vanadium-nickel alloy steel specifically engineered for fusion welded pressure vessels and critical structural applications. The unique combination of alloying elements provides an optimal balance of high strength (50 ksi minimum yield strength), excellent toughness, and superior weldability. The manganese-vanadium system delivers effective precipitation strengthening while maintaining good ductility, and the nickel addition significantly enhances low-temperature toughness. This makes Grade A particularly valuable for applications requiring reliable performance at sub-zero temperatures down to -20°F (-29°C). The material's excellent weldability characteristics, a key design feature of the A225 specification, make it particularly suitable for fabricated pressure vessels and structural components where fusion welding is the primary joining method. While requiring proper procedure control, the welding characteristics remain within the capabilities of qualified fabricators. ASTM A225 Grade A has established itself as a reliable and versatile material for pressure vessel construction, heavy structural applications, and industrial equipment where the combination of high strength, good toughness, and excellent weldability are essential requirements. Its proven performance in demanding service conditions ensures continued preference among engineers and fabricators. -:- For detailed product information, please contact sales. -: ASTM A225 Low Alloy Steel, Grade A Specification Dimensions Size： Diameter 20-1000 mm Length <4339 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 A Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A225 Low Alloy Steel Rod, Grade A -:- 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 810 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