ASTM A699 Steel Foil/Strip, class 2

ASTM A699 Steel Foil, class 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A699 Steel Foil, class 2 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A699 Steel, class 2 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A699 Steel, Class 2** **ASTM A699 Class 2** is a premium carbon steel plate specifically engineered for pressure vessel applications demanding superior low-temperature toughness and enhanced transition properties. As the higher-grade classification within the A699 specification, Class 2 offers improved impact resistance compared to Class 1, making it particularly suitable for critical low-temperature and cryogenic service where maximum resistance to brittle fracture is required. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A699/A699M** - "Standard Specification for Steel Plates, Carbon, for Pressure Vessels, Improved Transition Properties" **Classification:** - **Class 2** - Enhanced impact properties with stricter requirements - **Class 1** - Standard impact properties **International Equivalents:** - **EN 10028-3**: P275NL1 - **JIS G3115**: SGV 410 - **GB/T 3531**: 16MnDR - **ISO 9328-2**: P275NL1 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A699 Class 2: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.20 | | Manganese (Mn) | 0.70-1.00 | | Phosphorus (P) | 0.030 | | Sulfur (S) | 0.030 | | Silicon (Si) | 0.15-0.40 | | Copper (Cu) | 0.35 (when specified) | **Key Composition Features:** - **Strict Carbon Control**: Maximum 0.20% for optimal toughness - **Tighter Impurity Limits**: Reduced phosphorus and sulfur for improved purity - **Controlled Manganese**: Carefully balanced for strength and toughness - **Enhanced Silicon Range**: Provides consistent deoxidation --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for thicknesses up to 2 inches/50 mm):** | Property | Value | |---|---| | **Tensile Strength** | 450-530 MPa (65-77 ksi) | | **Yield Strength (min.)** | 275 MPa (40 ksi) | | **Elongation in 2" (min.)** | 24% | | **Elongation in 8" (min.)** | 27% | **Enhanced Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: -75°F (-60°C) - **Minimum Impact Energy**: 25 ft-lbf (34 J) average - **Individual Minimum**: 20 ft-lbf (27 J) - **Stricter Requirements**: Enhanced over Class 1 specifications **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 51.2 W/m·K - **Coefficient of Thermal Expansion**: 11.6 × 10⁻⁶/°C --- #### **4. Product Applications** **Critical Pressure Vessels:** - Deep cryogenic storage tanks - LNG processing and storage vessels - Liquid nitrogen/oxygen containers - Ultra-low temperature reactors **Chemical and Petrochemical:** - Low-temperature process vessels - Cryogenic reactor systems - Chemical storage at extreme temperatures - Specialized processing equipment **Energy Sector:** - Cryogenic energy storage systems - LNG power plant components - Advanced heat exchanger systems - Specialized power generation equipment **Aerospace and Defense:** - Rocket fuel storage vessels - Aerospace cryogenic systems - Defense equipment pressure vessels - Space exploration systems **Specialized Industrial:** - Industrial gas production equipment - Superconducting system components - Research laboratory vessels - Advanced cryogenic applications --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: With proper procedure control - **Preheat Guidelines**: 150-200°F (65-95°C) for thicker sections - **Recommended Processes**: GTAW, GMAW, SMAW (low-hydrogen) - **Filler Metals**: E7018, ER70S-6 with strict control **Forming & Machining:** - **Superior Formability**: Excellent for complex shapes - **Bend Radius**: Typically 1.0t for 90° bends - **Machinability**: Good (approximately 70% of B1112 steel) - **Surface Quality**: Excellent for critical applications **Heat Treatment:** - Typically supplied in normalized condition - Stress relieving recommended for complex fabrications - Controlled cooling processes employed **Quality Assurance:** - Enhanced Charpy V-Notch testing requirements - Multiple test locations with stricter criteria - Full traceability and certification - Additional non-destructive testing as specified --- ### **Technical Summary** ASTM A699 Class 2 represents the premium grade in carbon steel plates for pressure vessels requiring exceptional low-temperature toughness. With enhanced impact properties tested at -75°F (-60°C) and stricter chemical controls, this classification provides superior performance in the most demanding cryogenic and low-temperature applications. The material's optimized chemistry and manufacturing processes ensure reliable resistance to brittle fracture, making it the material of choice for critical applications in LNG storage, aerospace cryogenics, and advanced industrial gas processing. The enhanced purity levels and controlled microstructure contribute to its exceptional low-temperature characteristics. While maintaining the same strength levels as Class 1, Class 2 offers significantly improved toughness properties, providing engineers with an additional safety margin for critical applications. The material's excellent fabrication characteristics, combined with its certified enhanced impact properties, make it an ideal choice for pressure vessels operating in extreme low-temperature environments where reliability and safety are paramount considerations. -:- For detailed product information, please contact sales. -: ASTM A699 Steel, class 2 Specification Dimensions Size： Diameter 20-1000 mm Length <4312 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 A699 Steel, class 2 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A699 Steel Foil, class 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A699 Steel Foil, class 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A699 Steel Foil/Strip, class 2 -:- 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 Foil/Strip 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 783 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