ASTM A633 HSLA Steel Flange Grade A

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 A633 HSLA Steel Flange Grade A, Thickness < 100 mm (4 in.) Product Information -:- For detailed product information, please contact sales. -: ASTM A633 HSLA Steel Flange Grade A, Thickness < 100 mm (4 in.) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A633 HSLA Steel Grade A, Thickness < 100 mm (4 in.) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A633 High-Strength Low-Alloy Structural Steel, Grade A (Thickness < 100 mm)** **ASTM A633** is a comprehensive standard specification for **high-strength low-alloy (HSLA) structural steel plates** intended for use in welded, bolted, or riveted structures where improved toughness and atmospheric corrosion resistance are desired. **Grade A** represents a normalized HSLA steel offering enhanced mechanical properties over standard carbon structural steels, making it particularly suitable for construction in environments where moderate low-temperature service is required. The thickness range **below 100 mm (4 inches)** represents the most commonly used plate thickness for structural applications, where the combination of strength and toughness is most critical. --- #### **1. Key International Standards** * **Primary Standard:** **ASTM A633 / A633M** - Standard Specification for Normalized High-Strength Low-Alloy Structural Steel Plates * **Related/Alternative Standards:** * **ASTM A572 / A572M:** High-Strength Low-Alloy Columbium-Vanadium Steels (a more common alternative, but not always normalized). * **ASTM A709 / A709M:** Standard Specification for Structural Steel for Bridges (often incorporates similar grades). * **EN 10025-4:** Hot rolled products of structural steels - Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels. * **ISO 4950:** High yield strength steel plates and wide flats. * **JIS G 3114:** Hot-rolled atmospheric corrosion resisting steels for welded structure. --- #### **2. Chemical Composition (Heat Analysis)** The chemical composition of Grade A is designed to achieve the specified mechanical properties in the normalized condition through the use of microalloying elements. | Element | Composition (%) - Maximum (unless range is shown) | | :--- | :--- | | **Carbon (C)** | 0.18 | | **Manganese (Mn)** | 0.90 - 1.35 | | **Phosphorus (P)** | 0.04 | | **Sulfur (S)** | 0.05 | | **Silicon (Si)** | 0.15 - 0.50 | | **Copper (Cu)** | 0.20 (min) | | **Columbium (Cb)** | 0.005 - 0.05 | | **Vanadium (V)** | 0.01 - 0.10 | *Note: The combination of **Columbium (Niobium)** and/or **Vanadium** provides grain refinement and precipitation strengthening during the normalizing heat treatment. The minimum **Copper** content enhances atmospheric corrosion resistance.* --- #### **3. Mechanical & Physical Properties (for Thickness < 100 mm)** The normalizing heat treatment (heating to a suitable temperature and air cooling) results in a refined grain structure, which improves both strength and toughness. **Mechanical Properties:** | Property | Value | Unit | | :--- | :--- | :--- | | **Yield Strength (min)** | 42 | ksi (290 MPa) | | **Tensile Strength (min)** | 63 | ksi (435 MPa) | | **Elongation in 2 in. (50 mm) (min)** | 23 | % | | **Charpy V-Notch Impact Test** | 15 ft-lb @ -75°F | (20 J @ -60°C) | **Physical Properties (Typical):** * **Density:** 0.284 lb/in³ (7850 kg/m³) * **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) * **Thermal Conductivity:** ~42 W/m·K (at 100°C) --- #### **4. Product Applications** ASTM A633 Grade A is widely used in structural applications where higher strength and better low-temperature toughness than carbon steel are required without the cost of quenched and tempered grades. * **Building Construction:** Columns, beams, and trusses in industrial plants, warehouses, and high-rise buildings. * **Bridge Construction:** Girders, support members, and other structural components. * **Mining and Quarrying Equipment:** Structural frames, buckets, and support structures. * **Heavy-Duty Machinery:** Frames and booms for cranes, excavators, and other equipment. * **Transmission Towers and Poles:** For electrical power distribution. --- #### **5. Key Advantages** * **Enhanced Toughness:** The normalized microstructure provides excellent impact toughness, making it suitable for low-temperature service down to -75°F (-60°C). * **Higher Strength-to-Weight Ratio:** Allows for lighter, more economical structures compared to those built with conventional carbon steels. * **Good Weldability:** The carefully controlled chemistry, particularly the carbon content, results in good weldability with standard procedures. * **Improved Atmospheric Corrosion Resistance:** The copper content provides better resistance to atmospheric corrosion compared to carbon steels. * **Normalized Condition:** Ensures uniform and consistent mechanical properties throughout the plate thickness. -:- For detailed product information, please contact sales. -: ASTM A633 HSLA Steel Grade A, Thickness < 100 mm (4 in.) Specification Dimensions Size： Diameter 20-1000 mm Length <4499 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 A633 HSLA Steel Grade A, Thickness < 100 mm (4 in.) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A633 HSLA Steel Flange Grade A, Thickness < 100 mm (4 in.) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A633 HSLA Steel Flange Grade A, Thickness < 100 mm (4 in.) -:- For detailed product information, please contact sales. -:

Packing of ASTM A633 HSLA Steel Flange Grade A, Thickness < 100 mm (4 in.) -:- 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 970 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