ASTM A699 Steel Rod/Bar, class 1

ASTM A699 Steel Rod, class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A699 Steel Rod, class 1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A699 Steel, class 1 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A699 Steel, Class 1** **ASTM A699 Class 1** is a high-strength, low-carbon steel plate specifically designed for pressure vessel applications requiring excellent notch toughness and weldability. This grade belongs to the specification for "Steel Plates, Carbon, for Pressure Vessels, Improved Transition Properties," making it particularly suitable for low-temperature service where resistance to brittle fracture is critical. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A699/A699M** - "Standard Specification for Steel Plates, Carbon, for Pressure Vessels, Improved Transition Properties" **Classification:** - **Class 1** - Standard grade with specified impact properties - **Class 2** - Enhanced impact properties (when specified) **International Equivalents:** - **EN 10028-2**: P275NH - **JIS G3115**: SGV 410 - **GB/T 713**: Q245R - **ISO 9328-2**: P275NL --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A699 Class 1: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.20 | | Manganese (Mn) | 0.70-1.00 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.15-0.40 | | Copper (Cu) | 0.35 (when specified) | **Key Composition Features:** - **Low Carbon Content**: Ensures excellent weldability and notch toughness - **Controlled Manganese**: Optimized for improved transition properties - **Silicon Range**: Provides effective deoxidation and strength - **Optional Copper**: Available for enhanced corrosion resistance --- #### **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.)** | 22% | | **Elongation in 8" (min.)** | 25% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: -50°F (-45°C) - **Minimum Impact Energy**: 20 ft-lbf (27 J) average - **Individual Minimum**: 15 ft-lbf (20 J) **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**: 51.5 W/m·K - **Coefficient of Thermal Expansion**: 11.7 × 10⁻⁶/°C - **Specific Heat Capacity**: 486 J/kg·K --- #### **4. Product Applications** **Pressure Vessel Industry:** - Low-temperature storage tanks - Cryogenic pressure vessels - LNG storage containers - Refrigeration system vessels **Chemical Processing:** - Chemical storage tanks - Process vessels for low-temperature service - Reactor vessels - Distillation columns **Power Generation:** - Feedwater heaters - Deaerator tanks - Low-pressure steam drums - Heat exchanger shells **Oil and Gas:** - Gas processing equipment - Low-temperature separators - Compressor station vessels - Pipeline pressure vessels **Industrial Applications:** - Industrial gas storage vessels - Cryogenic transport containers - Low-temperature heat exchangers - Specialized process equipment --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: All standard processes applicable - **Preheat Requirements**: Generally not required for thinner sections - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E7018, ER70S-6 or equivalent **Forming & Machining:** - **Good Formability**: Suitable for cold forming operations - **Bend Radius**: Typically 1.5t for 90° bends - **Machinability**: Good (approximately 65% of B1112 steel) - **Cutting Methods**: All standard methods applicable **Heat Treatment:** - Normally supplied in as-rolled or normalized condition - Stress relieving available when specified - Post-weld heat treatment not generally required **Quality Assurance:** - Mandatory Charpy V-Notch impact testing - Multiple test locations per plate - Full mechanical property certification - Non-destructive testing as specified --- ### **Technical Summary** ASTM A699 Class 1 represents a specialized carbon steel plate engineered specifically for pressure vessel applications requiring improved transition properties and excellent low-temperature toughness. The material's balanced chemical composition and controlled manufacturing process ensure reliable performance in low-temperature service conditions where resistance to brittle fracture is essential. The grade's excellent weldability and formability characteristics make it particularly suitable for fabricating complex pressure vessel components that must maintain integrity at sub-zero temperatures. Its certified impact properties at -50°F provide engineers with confidence in designs for cryogenic and low-temperature applications across various industries including LNG, chemical processing, and industrial gas storage. While offering moderate strength levels compared to high-strength alloys, ASTM A699 Class 1 provides an optimal balance of manufacturability, cost-effectiveness, and reliable low-temperature performance. The material's proven track record in critical pressure vessel applications and its consistent quality have established it as a preferred choice for engineers designing equipment for low-temperature service where safety and reliability are paramount considerations. -:- For detailed product information, please contact sales. -: ASTM A699 Steel, class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4311 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 1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A699 Steel Rod, class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A699 Steel Rod, class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A699 Steel Rod, 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 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 782 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