ASTM A710 Steel Flange, grade A, class 2

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ASTM A710 Steel Flange, grade A, class 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A710 Steel Flange, 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 Flange, grade A, class 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A710 Steel Flange, grade A, class 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A710 Steel Flange, 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 Flange 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