ASTM A710 Steel Wire, grade A, class 2

ASTM A710 Steel Wire, grade A, class 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A710 Steel Wire, grade A, class 2 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A710 Steel, grade A, class 2 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A710 Steel, Grade A, Class 2** #### **1. Overview** ASTM A710/A710M is the standard specification for **Age-Hardening, Low-Carbon Nickel-Copper-Chromium-Molybdenum-Columbium (Niobium) Alloy Structural Steel**. **Grade A, Class 2** represents a specific subset of this high-performance material characterized by its unique **solution heat-treated and precipitation hardened (aged) condition**. This two-stage thermal process results in a steel offering an exceptional combination of **high strength, superior low-temperature toughness, and excellent weldability** with a very low carbon equivalent, making it a premier choice for critical applications in demanding environments. #### **2. International Standard** The primary governing standard is **ASTM A710/A710M - Standard Specification for Age-Hardening, Low-Carbon Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Structural Steel**. The "Class 2" designation explicitly denotes material that has been **solution heat-treated, rapidly cooled, and then precipitation hardened (aged)**. This process differentiates it from other classes and is fundamental to achieving its unique properties. Other relevant standards include: * **ASTM A435/A435M:** Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates. * **ASTM A578/A578M:** Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications. * **AWS D1.1/D1.1M:** Structural Welding Code - Steel. #### **3. Chemical Composition (Heat Analysis)** The chemical composition of A710 Grade A is carefully balanced to facilitate the solution and age-hardening processes. The very low carbon content is the cornerstone of its weldability, while elements like Ni, Cu, Nb, and Mo contribute to strength through solid solution and precipitation hardening. *Typical Composition Ranges (Weight %):* | Element | Grade A, Class 2 | | :--- | :--- | | Carbon (C) | ≤ 0.07 | | Manganese (Mn) | 0.40 - 0.70 | | Phosphorus (P) | ≤ 0.025 | | Sulfur (S) | ≤ 0.025 | | Silicon (Si) | 0.15 - 0.35 | | 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/Nb) | 0.02 - 0.10 | | **Carbon Equivalent (CE)** | **Exceptionally low (~0.34-0.38 per IIW formula), ensuring superior weldability.** | #### **4. Mechanical & Physical Properties** The solution heat treatment followed by aging produces a fine-grained microstructure with a highly desirable balance of strength and toughness. *Guaranteed Minimum Mechanical Properties (Per ASTM A710/A710M):* | Property | Value (Typical for Plate) | | :--- | :--- | | Yield Strength (min) | 70 ksi (485 MPa) | | Tensile Strength (min) | 85 ksi (585 MPa) | | Elongation in 2 in (min) | 18% | | **Charpy V-Notch Impact Energy** | | | Test Temperature | **-100°F (-73°C)** | | Minimum Avg. Energy | **40 ft-lbf (54 J)** | *Note: The guaranteed 40 ft-lbf at -100°F is a defining characteristic, indicating exceptional cryogenic toughness.* *Typical Physical Properties:* * Density: ~0.284 lb/in³ (7.85 g/cm³) * Modulus of Elasticity: 29,000 ksi (200 GPa) * Poisson's Ratio: 0.29 * Coefficient of Thermal Expansion: 6.5 x 10⁻⁶ /°F (11.7 x 10⁻⁶ /°C) #### **5. Product Applications** ASTM A710 Grade A, Class 2 is engineered for the most demanding applications where performance under extreme conditions is non-negotiable. Its key advantages are leveraged in: * **Cryogenic Pressure Vessels & Storage Tanks:** Primary material for **LNG (Liquefied Natural Gas)** storage tanks, transport vessels, and processing equipment where service temperatures can reach -260°F (-162°C). Its guaranteed toughness at -100°F provides a critical safety margin. * **Offshore & Marine Structures:** Critical node joints, hull sections, and topside components in arctic offshore platforms and ice-class vessels, where combined high strength, low-temperature toughness, and corrosion resistance are required. * **Power Generation:** Components in advanced energy systems, including nuclear containment and advanced reactor designs. * **Military & Defense:** Hulls and structural members of naval ships and submarines operating in cold waters. * **High-Performance Structural Components:** Where weight savings, fatigue resistance, and ease of fabrication are key drivers. #### **6. Key Characteristics & Advantages** * **Unmatched Weldability:** The ultra-low carbon content and resulting low CE mean this steel can typically be welded **without preheat** in most thicknesses (subject to procedure qualification), drastically reducing fabrication complexity, cost, and risk of hydrogen-induced cracking. * **Superlative Cryogenic Toughness:** The Class 2 heat treatment process optimizes the microstructure, providing industry-leading impact toughness at extremely low temperatures, a critical factor for cryogenic and arctic applications. * **Age-Hardening Benefits:** The precipitation hardening process achieves high strength with minimal distortion and excellent through-thickness uniformity compared to quench & tempered steels. * **Good General and Atmospheric Corrosion Resistance:** The copper and chromium additions provide better corrosion resistance than standard carbon steels, suitable for marine environments. * **High Strength-to-Weight Ratio:** Enables lighter and more efficient designs without compromising safety or performance. **Conclusion:** ASTM A710 Grade A, Class 2 is a premium, age-hardening alloy steel defined by its solution-treated and aged condition. It delivers a rare and highly valuable synergy of **exceptional low-temperature toughness, high strength, and outstanding weldability.** This makes it the material of choice for engineers designing critical infrastructure for cryogenic service, arctic environments, and other high-stakes applications where material reliability, fabricability, and performance under extreme conditions are paramount. Its use often represents an optimized lifecycle cost solution by simplifying fabrication while ensuring long-term operational integrity. -:- For detailed product information, please contact sales. -: ASTM A710 Steel, grade A, class 2 Specification Dimensions Size： Diameter 20-1000 mm Length <5701 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 2 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A710 Steel Wire, grade A, class 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A710 Steel Wire, grade A, class 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A710 Steel Wire, grade A, 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 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 2172 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