ASTM A573 Steel Flange, grade 58

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 58 Product Information -:- For detailed product information, please contact sales. -: ASTM A573 Steel Flange, grade 58 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A573 Steel, grade 58 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A573 Grade 58 Steel** **ASTM A573 Grade 58** is a carbon-manganese-silicon steel plate specifically designed for structural applications requiring improved toughness characteristics. Classified under the specification for "Structural Carbon Steel Plates of Improved Toughness," this grade provides a minimum yield strength of **33 ksi (230 MPa)** with enhanced impact properties compared to conventional carbon steels. The "58" designation refers to the minimum tensile strength in ksi units, making it particularly valuable for applications where reliability under dynamic or impact loading conditions is essential. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A573/A573M** - "Standard Specification for Structural Carbon Steel Plates of Improved Toughness" **Grade Classification:** - **Grade 58** [400 MPa tensile strength] - Minimum tensile strength 58 ksi - Other grades in A573 series: 65 and 70 **International Equivalents:** - **EN 10025-2**: S235J0/S235J2 - **JIS G3101**: SM400 - **GB/T 700**: Q235 - **ISO 630-2**: E235C --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A573 Grade 58: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.23 | | Manganese (Mn) | 0.60-0.90 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.15-0.40 | **Key Composition Features:** - **Controlled Carbon Content**: Optimized for toughness and weldability - **Manganese Range**: Carefully balanced for strength and impact resistance - **Silicon Content**: Enhanced deoxidation for improved internal soundness - **Restricted Impurities**: Limited sulfur and phosphorus for better toughness --- #### **3. Physical & Mechanical Properties** **Mechanical Properties:** | Property | Value | |---|---| | **Tensile Strength** | 400-490 MPa (58-71 ksi) | | **Yield Strength (min.)** | 230 MPa (33 ksi) | | **Elongation in 2" (min.)** | 21% | | **Elongation in 8" (min.)** | 23% | **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 --- #### **4. Product Applications** **Structural Construction:** - Building frames and supports - Bridge components - Industrial plant structures - Seismic-resistant construction **Heavy Equipment:** - Construction machinery components - Mining equipment parts - Material handling structures - Crane and hoist components **Transportation Infrastructure:** - Bridge deck supports - Highway guard rail supports - Sign structure components - Traffic signal supports **Industrial Applications:** - Machinery base plates - Equipment support frames - Storage tank structures - Process plant components **Special Applications:** - Wind turbine tower sections - Transmission tower components - Marine structure elements - Agricultural equipment frames --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: All standard processes applicable - **Preheat Requirements**: Generally not required for thicknesses ≤ 1 inch - **Recommended Processes**: SMAW, GMAW, FCAW, SAW - **Filler Metals**: E60XX or E70XX series electrodes **Forming & Machining:** - **Good Formability**: Suitable for cold bending and forming - **Bend Radius**: Typically 1.5t for 90° bends - **Machinability**: Good (approximately 65% of B1112 steel) - **Shearing & Punching**: Excellent performance with standard equipment **Heat Treatment:** - Normally supplied in as-rolled condition - Stress relieving available when specified - Normalizing possible for enhanced properties **Impact Testing:** - Charpy V-Notch testing required - Multiple tests per plate as specified - Test temperature and energy values certified --- ### **Technical Summary** ASTM A573 Grade 58 represents a significant advancement in carbon steel plate technology, specifically engineered to provide improved toughness characteristics over conventional structural steels. While maintaining a yield strength comparable to Grade 36 steels, its enhanced impact properties make it particularly suitable for applications subject to dynamic loading, vibration, or moderate impact conditions. The controlled chemistry and manufacturing process ensure consistent mechanical properties and reliable performance in finished structures. The grade's excellent weldability and formability, combined with its certified toughness properties, make it an ideal choice for structural applications where reliability and safety are paramount. Its balanced combination of strength, toughness, and manufacturability has established ASTM A573 Grade 58 as a preferred material for critical structural components across multiple industries. -:- For detailed product information, please contact sales. -: ASTM A573 Steel, grade 58 Specification Dimensions Size： Diameter 20-1000 mm Length <4298 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 58 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A573 Steel Flange, grade 58 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A573 Steel Flange, grade 58 -:- For detailed product information, please contact sales. -:

Packing of ASTM A573 Steel Flange, grade 58 -:- 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 769 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