ASTM A710 Steel Seamless tube, grade A, class 1

ASTM A710 Steel Seamless tube, grade A, class 1, 6.4 - 8.0 mm thick Product Information -:- For detailed product information, please contact sales. -: ASTM A710 Steel Seamless tube, grade A, class 1, 6.4 - 8.0 mm thick Synonyms -:- For detailed product information, please contact sales. -:

ASTM A710 Steel, grade A, class 1, 6.4 - 8.0 mm thick Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A710 Steel, Grade A, Class 1 (6.4 - 8.0 mm thick)** **ASTM A710 Grade A, Class 1** is a high-strength low-alloy (HSLA) steel featuring copper precipitation strengthening, supplied in the **6.4 - 8.0 mm thickness range**. This advanced steel offers an exceptional combination of high strength, excellent toughness, and good weldability through a unique age-hardening heat treatment process, making it ideal for demanding structural applications. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A710/A710M** - "Standard Specification for Age-Hardening Low-Carbon Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Steel Plates" **Classification:** - **Grade A, Class 1** - As-supplied condition (age-hardened) - Other Classes: Class 2 (solution heat treated), Class 3 (solution heat treated and age hardened) **International Equivalents:** - **EN 10028-6**: SEV 265 - **JIS G3125**: SPA-H - **ISO 4952**: HSLA 450 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A710 Grade A: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.07 | | Manganese (Mn) | 0.40-0.70 | | Phosphorus (P) | 0.025 | | Sulfur (S) | 0.025 | | Silicon (Si) | 0.40 | | Nickel (Ni) | 0.70-1.00 | | Copper (Cu) | 1.00-1.30 | | Chromium (Cr) | 0.40-0.80 | | Molybdenum (Mo) | 0.15-0.25 | | Columbium (Cb) | 0.02-0.10 | **Key Composition Features:** - **Ultra-Low Carbon**: Ensures excellent weldability and toughness - **Copper-Nickel System**: Primary precipitation strengthening mechanism - **Multiple Alloying**: Chromium, molybdenum, and columbium for enhanced properties - **High Purity**: Strict control of sulfur and phosphorus --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (6.4 - 8.0 mm thickness):** | Property | Value | |---|---| | **Tensile Strength** | 585-760 MPa (85-110 ksi) | | **Yield Strength (min.)** | 450 MPa (65 ksi) | | **Elongation in 2" (min.)** | 20% | | **Elongation in 8" (min.)** | 22% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: -100°F (-73°C) - **Minimum Impact Energy**: 40 ft-lbf (54 J) - **Exceptional Toughness**: Maintains properties at cryogenic temperatures **Physical Properties:** - **Density**: 7.87 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 203 GPa (29,400 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 44.5 W/m·K - **Coefficient of Thermal Expansion**: 11.5 × 10⁻⁶/°C --- #### **4. Product Applications** **Pressure Vessel Industry:** - Cryogenic storage tanks - LNG containment systems - Low-temperature pressure vessels - Chemical process equipment **Marine and Offshore:** - Ship hull components - Offshore platform structures - Submarine pressure hulls - Marine construction equipment **Aerospace and Defense:** - Missile components - Aircraft structural parts - Military vehicle armor - Space vehicle structures **Energy Sector:** - Nuclear power plant components - Hydroelectric equipment - Wind turbine structural parts - Power transmission towers **Industrial Equipment:** - Heavy machinery frames - Mining equipment components - Material handling systems - Specialized structural applications --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: Despite high strength - **Preheat Requirements**: 200-250°F (95-120°C) recommended - **Recommended Processes**: GTAW, GMAW, SMAW (low hydrogen) - **Filler Metals**: Matching strength nickel-copper alloys **Forming & Cutting:** - **Good Formability**: Suitable for cold forming operations - **Minimum Bend Radius**: 2t for 90° bends - **Cutting Methods**: Plasma, laser, and waterjet cutting preferred - **Machinability**: Fair (requires appropriate tooling) **Heat Treatment Considerations:** - **Age-Hardened Condition**: As supplied - **Weld Thermal Effects**: Minimal property degradation - **Post-Weld Heat Treatment**: Generally not required - **Thermal Stability**: Good resistance to over-aging **Quality Assurance:** - **Comprehensive Testing**: Tensile and impact tests mandatory - **Multiple Test Locations**: Through-thickness properties verified - **NDT Requirements**: Ultrasonic testing as specified - **Certification**: Full traceability and test reports --- ### **Technical Summary** ASTM A710 Grade A, Class 1 in the 6.4 - 8.0 mm thickness range represents a premium age-hardening steel that delivers an exceptional combination of high strength (65 ksi yield minimum) and outstanding low-temperature toughness. The unique copper precipitation strengthening mechanism, combined with ultra-low carbon content, provides a material that maintains excellent weldability despite its high strength level. The material's ability to retain high impact energy down to -100°F (-73°C) makes it particularly valuable for cryogenic applications, marine environments, and other demanding service conditions. The 6.4 - 8.0 mm thickness range is ideal for fabricated structures requiring both high strength and good formability. This steel's consistent performance, combined with its unique aging characteristics and excellent corrosion resistance (due to copper content), has established it as a preferred material for critical applications in pressure vessel construction, marine engineering, and defense industries where reliability under extreme conditions is paramount. -:- For detailed product information, please contact sales. -: ASTM A710 Steel, grade A, class 1, 6.4 - 8.0 mm thick Specification Dimensions Size： Diameter 20-1000 mm Length <4322 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 A710 Steel, grade A, class 1, 6.4 - 8.0 mm thick Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A710 Steel Seamless tube, grade A, class 1, 6.4 - 8.0 mm thick -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A710 Steel Seamless tube, grade A, class 1, 6.4 - 8.0 mm thick -:- For detailed product information, please contact sales. -:

Packing of ASTM A710 Steel Seamless tube, grade A, class 1, 6.4 - 8.0 mm thick -:- 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 Seamless tube 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 793 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