ASTM A573 Steel Flange, grade 65

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 A573 Steel Flange, grade 65 Product Information -:- For detailed product information, please contact sales. -: ASTM A573 Steel Flange, grade 65 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A573 Steel, grade 65 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A573 Grade 65 Steel** **ASTM A573 Grade 65** is a medium-strength carbon steel plate classified under the specification for structural carbon steel plates of improved toughness. This grade provides a minimum yield strength of **35 ksi (240 MPa)** and is characterized by enhanced notch toughness properties compared to conventional carbon steels. The "65" designation refers to the minimum tensile strength in ksi units, positioning this grade as an intermediate strength material with superior impact resistance for structural applications requiring reliable performance under dynamic loading conditions. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A573/A573M** - "Standard Specification for Structural Carbon Steel Plates of Improved Toughness" **Grade Classification:** - **Grade 65** [450 MPa tensile strength] - Minimum tensile strength 65 ksi - Other grades in A573 series: 58 and 70 **International Equivalents:** - **EN 10025-2**: S275JR/S275J0 - **JIS G3101**: SM490YA - **GB/T 700**: Q275 - **ISO 630-2**: E275B --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A573 Grade 65: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.23 | | Manganese (Mn) | 0.85-1.20 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.15-0.40 | **Key Composition Features:** - **Optimized Carbon Level**: Balances strength and weldability - **Enhanced Manganese**: Increased range for improved strength and toughness - **Silicon Control**: Provides effective deoxidation and strength enhancement - **Impurity Restrictions**: Controlled sulfur and phosphorus for better impact properties --- #### **3. Physical & Mechanical Properties** **Mechanical Properties:** | Property | Value | |---|---| | **Tensile Strength** | 450-530 MPa (65-77 ksi) | | **Yield Strength (min.)** | 240 MPa (35 ksi) | | **Elongation in 2" (min.)** | 19% | | **Elongation in 8" (min.)** | 21% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: 70°F (21°C) - **Minimum Impact Energy**: 20 ft-lbf (27 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**: 51.9 W/m·K - **Coefficient of Thermal Expansion**: 11.7 × 10⁻⁶/°C - **Specific Heat Capacity**: 486 J/kg·K --- #### **4. Product Applications** **Structural Engineering:** - Bridge components and girders - Building structural frames - Industrial plant structures - Seismic-resistant construction elements **Heavy Machinery:** - Construction equipment frames - Mining machinery components - Crane and hoist structural members - Heavy press frames **Transportation Infrastructure:** - Bridge bearing components - Heavy-duty guard rail systems - Sign support structures - Railway infrastructure components **Energy Sector:** - Power plant structural members - Transmission tower components - Wind turbine structural parts - Hydroelectric plant structures **Industrial Equipment:** - Heavy-duty storage racks - Process equipment supports - Material handling structures - Industrial platform systems --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: Suitable for all common welding processes - **Preheat Guidelines**: Recommended for thicknesses over 1 inch - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E70XX series electrodes **Forming & Machining:** - **Good Formability**: Adequate for most cold forming operations - **Bend Radius**: Typically 2t for 90° bends - **Machinability**: Good (approximately 60% of B1112 steel) - **Shearing & Punching**: Performs well with proper tool maintenance **Heat Treatment:** - Supplied in as-rolled condition - Normalizing available for enhanced properties - Stress relieving recommended for complex fabrications **Quality Assurance:** - Charpy V-Notch impact testing required - Multiple test locations per plate as specified - Full certification of mechanical properties --- ### **Technical Summary** ASTM A573 Grade 65 occupies an important position in the family of improved toughness structural steels, offering a balanced combination of medium strength and enhanced impact resistance. The grade's controlled chemical composition and manufacturing process ensure consistent mechanical properties with reliable notch toughness, making it particularly suitable for applications where dynamic loading or vibration resistance is critical. Its superior toughness characteristics compared to conventional carbon steels of similar strength levels provide an added margin of safety in structural applications. The material's excellent weldability and formability, combined with certified impact properties, make it a preferred choice for bridge construction, industrial structures, and heavy equipment components. ASTM A573 Grade 65 represents an optimal solution for engineers seeking improved performance characteristics without moving to higher-cost alloy steels, providing reliable service in demanding structural applications where toughness and durability are essential requirements. -:- For detailed product information, please contact sales. -: ASTM A573 Steel, grade 65 Specification Dimensions Size： Diameter 20-1000 mm Length <4299 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 A573 Steel, grade 65 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A573 Steel Flange, grade 65 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A573 Steel Flange, grade 65 -:- For detailed product information, please contact sales. -:

Packing of ASTM A573 Steel Flange, grade 65 -:- 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 770 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