ASTM A570 Steel Flange, grade 50

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 A570 Steel Flange, grade 50 Product Information -:- For detailed product information, please contact sales. -: ASTM A570 Steel Flange, grade 50 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A570 Steel, grade 50 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A570 Grade 50 Steel** **ASTM A570 Grade 50** is a high-strength hot-rolled carbon steel sheet and strip designed for structural applications requiring a minimum yield strength of **50 ksi (345 MPa)**. As the highest commonly used grade in the A570 series, it provides superior load-bearing capacity while maintaining reasonable formability and weldability. This grade serves as an economical high-strength solution for structural components where weight reduction and enhanced performance are critical requirements. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A570/A570M** - "Standard Specification for Steel, Sheet and Strip, Carbon, Hot-Rolled, Structural Quality" **Grade Classification:** - **Grade 50** [345 MPa] - Minimum yield strength 50 ksi - Other grades in A570 series: 30, 33, 36, 40, 45, 55 **International Equivalents:** - **EN 10025-2**: S355JR/S355J0 - **JIS G3101**: SM490 - **GB/T 700**: Q345 - **ISO 630-2**: E355C --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A570 Grade 50: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.25 | | Manganese (Mn) | 0.90 | | Phosphorus (P) | 0.04 | | Sulfur (S) | 0.05 | | Silicon (Si) | 0.40 (optional) | **Key Composition Features:** - **High-Strength Carbon Steel**: Maximum strength in the A570 series - **Optimized Chemistry**: Balanced for strength and manufacturability - **Manganese Utilization**: Primary strengthening mechanism - **Controlled Impurities**: Limited phosphorus and sulfur for ductility --- #### **3. Physical & Mechanical Properties** **Mechanical Properties:** | Property | Value | |---|---| | **Tensile Strength** | 520-620 MPa (75-90 ksi) | | **Yield Strength (min.)** | 345 MPa (50 ksi) | | **Elongation in 2" (min.)** | 16% | | **Elongation in 8" (min.)** | 19% | **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** **Heavy Structural Framing:** - Building primary support columns - Heavy industrial roof structures - Crane support beams and girders - Mezzanine primary framing **Transportation Industry:** - Heavy truck main frames - Trailer chassis components - Bus structural reinforcements - Special vehicle chassis elements **Industrial Equipment:** - Heavy machinery base frames - Press equipment supports - Crane and hoist structural members - Heavy conveyor support structures **Construction & Infrastructure:** - Bridge floor beams - Construction shoring systems - Temporary bridge components - Heavy-duty scaffolding **Agricultural & Mining:** - Mining equipment frames - Tractor main frames - Excavator structural components - Heavy implement supports --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability with Precautions**: Requires controlled procedures - **Preheat Requirement**: 100-150°C for thicknesses over 3/8 inch - **Recommended Processes**: GMAW, FCAW, SMAW (low-hydrogen) - **Filler Metals**: E70XX or E80XX series electrodes **Forming & Machining:** - **Moderate Formability**: Requires significant forming power - **Bend Radius**: Typically 2.5t to 3t for 90° bends - **Machinability**: Fair to poor (approximately 45% of B1112 steel) - **Shearing & Punching**: Requires heavy-duty equipment **Surface Characteristics:** - Standard hot-rolled surface with mill scale - Thorough surface preparation essential for coating adhesion - Suitable for all industrial coating systems - Abrasive blasting recommended for critical applications **Heat Treatment:** - Supplied in as-rolled condition - Stress relieving recommended for complex welded structures - Normalizing available for enhanced properties --- ### **Technical Summary** ASTM A570 Grade 50 represents the pinnacle of strength in the economical hot-rolled carbon steel category, delivering 50 ksi yield strength for demanding structural applications. This grade provides designers with a cost-effective high-strength option that bridges the gap between conventional carbon steels and premium high-strength low-alloy grades. While fabrication requires more careful procedure control compared to lower grades, the significant strength advantage makes it ideal for applications where weight reduction and structural efficiency are paramount. The grade's excellent strength-to-cost ratio has made it a preferred choice for heavy structural applications across multiple industries. Proper attention to welding parameters, forming limitations, and surface preparation ensures optimal performance in finished components, making ASTM A570 Grade 50 a reliable and economical choice for high-strength structural requirements. -:- For detailed product information, please contact sales. -: ASTM A570 Steel, grade 50 Specification Dimensions Size： Diameter 20-1000 mm Length <4297 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 A570 Steel, grade 50 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A570 Steel Flange, grade 50 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A570 Steel Flange, grade 50 -:- For detailed product information, please contact sales. -:

Packing of ASTM A570 Steel Flange, grade 50 -:- 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 768 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