ASTM A203 Low Alloy Steel Wire, Grade E

ASTM A203 Low Alloy Steel Wire, Grade E Product Information -:- For detailed product information, please contact sales. -: ASTM A203 Low Alloy Steel Wire, Grade E Synonyms -:- For detailed product information, please contact sales. -:

ASTM A203 Low Alloy Steel, Grade E Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A203 Grade E Steel** **ASTM A203 Grade E** is a high-nickel alloy steel plate specifically designed for pressure vessel applications requiring exceptional low-temperature toughness. With a nominal **3.50% nickel** content and enhanced mechanical properties, this grade offers superior performance at cryogenic temperatures, making it suitable for the most demanding low-temperature service conditions. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A203/A203M** - "Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel" **Grade Classification:** - **Grade E** - 3.50% nickel steel with enhanced strength properties - Other grades: A, B, D, F with varying nickel content and properties **International Equivalents:** - **EN 10028-4**: 12Ni19 - **JIS G3127**: SLA 235B - **GB/T 3531**: 09MnNiDR - **ISO 9328-4**: 12Ni19 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A203 Grade E: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.20 | | Manganese (Mn) | 0.70 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.30 | | Nickel (Ni) | 3.25-3.75 | **Key Composition Features:** - **High Nickel Content**: 3.25-3.75% for exceptional low-temperature toughness - **Optimized Carbon**: Slightly higher than Grade D for enhanced strength - **Controlled Manganese**: Maintains optimal strength-toughness balance - **Low Silicon**: Preserves excellent impact properties --- #### **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.)** | 20% | | **Elongation in 8" (min.)** | 23% | **Low-Temperature Toughness Properties:** - **Charpy V-Notch Test Temperature**: -150°F (-101°C) - **Minimum Impact Energy**: 20 ft-lbf (27 J) - **Exceptional Toughness**: Maintains properties at extreme cryogenic temperatures **Physical Properties:** - **Density**: 7.87 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 201 GPa (29,150 ksi) - **Thermal Conductivity**: 48.0 W/m·K - **Coefficient of Thermal Expansion**: 11.4 × 10⁻⁶/°C - **Specific Heat Capacity**: 470 J/kg·K --- #### **4. Product Applications** **Critical Cryogenic Service:** - LNG storage and transportation tanks - Liquid ethylene processing equipment - Cryogenic research vessels - Ultra-low temperature containment systems **Chemical and Petrochemical:** - Ethylene production equipment - Low-temperature reactor systems - Cryogenic separation columns - Advanced chemical process vessels **Energy Sector:** - LNG liquefaction plant components - Cryogenic power generation equipment - Advanced energy storage systems - Specialized heat exchange equipment **Industrial and Research:** - Industrial gas production facilities - Cryogenic research equipment - Advanced cooling systems - Specialized testing apparatus --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: Requires careful procedure control - **Preheat Requirements**: 200-300°F (95-150°C) recommended - **Post-Weld Heat Treatment**: Stress relieving at 1100-1200°F (595-650°C) - **Recommended Processes**: GTAW, GMAW, SMAW (low-hydrogen) - **Filler Metals**: ENiCrFe-3, ERNiCr-3 or equivalent **Forming & Machining:** - **Good Formability**: Suitable for complex forming operations - **Machinability**: Fair to good (approximately 60% of B1112 steel) - **Cutting Methods**: Waterjet, laser, and plasma cutting preferred - **Bend Performance**: Excellent for cryogenic applications **Heat Treatment:** - Supplied in normalized and tempered condition - Normalizing temperature: 1550-1650°F (845-900°C) - Tempering temperature: 1100-1200°F (595-650°C) - Microstructural control maintained **Quality Assurance:** - **Mandatory Impact Testing**: Charpy V-Notch at -150°F (-101°C) - **Chemical Analysis**: Complete heat certification - **Mechanical Testing**: Comprehensive property verification - **Non-Destructive Testing**: UT, RT, MT as required --- ### **Technical Summary** ASTM A203 Grade E represents a premium high-nickel alloy steel engineered for critical cryogenic applications requiring both exceptional toughness and enhanced strength. The 3.50% nickel content combined with optimized chemistry provides outstanding performance at temperatures as low as -150°F (-101°C), while the 50 ksi minimum yield strength offers significant advantages in structural efficiency. This grade demonstrates superior fracture toughness and low-temperature characteristics, making it particularly valuable for LNG storage, ethylene processing, and other cryogenic applications where safety and reliability are paramount. The enhanced strength properties allow for more efficient vessel designs while maintaining the rigorous safety standards required for cryogenic service. The material exhibits excellent fabrication characteristics, with welding and forming properties that facilitate the construction of complex pressure vessel components. While requiring careful attention to welding procedures and heat treatment, Grade E remains within the capabilities of qualified pressure vessel fabricators with proper procedure qualification and quality control measures. ASTM A203 Grade E has established itself as a reliable and cost-effective solution for severe cryogenic service, offering performance characteristics that meet the demanding requirements of modern cryogenic engineering while providing an economical alternative to more expensive high-nickel alloys. -:- For detailed product information, please contact sales. -: ASTM A203 Low Alloy Steel, Grade E Specification Dimensions Size： Diameter 20-1000 mm Length <4334 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 A203 Low Alloy Steel, Grade E Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A203 Low Alloy Steel Wire, Grade E -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A203 Low Alloy Steel Wire, Grade E -:- For detailed product information, please contact sales. -:

Packing of ASTM A203 Low Alloy Steel Wire, Grade E -:- 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 Wire 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 805 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