ASTM A283 Steel Flange, grade B

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 A283 Steel Flange, grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A283 Steel Flange, grade B Synonyms -:- For detailed product information, please contact sales. -:

ASTM A283 Steel, grade B Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A283 / A283M Steel, Grade B** --- #### **1. Product Overview** ASTM A283 Grade B is a **mild carbon steel plate** offering intermediate strength within the A283 standard series. This grade provides a balanced combination of strength, formability, and weldability, making it suitable for general structural applications requiring higher mechanical properties than Grade A while maintaining good fabrication characteristics. Grade B is widely used in construction, manufacturing, and structural fabrication where moderate strength and excellent workability are required. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A283 / A283M Grade B** | | **UNS Number** | **K02300** | | **ISO International Standard** | **ISO 630-2** | | **European Norm (EN)** | **S275JR** (Equivalent) | | **Japanese (JIS)** | **SS 400** | | **Chinese GB** | **Q235B** | | **Indian (IS)** | **E250B** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.17 max | | **Manganese (Mn)** | 0.90 max | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Silicon (Si)** | 0.40 max | | **Copper (Cu)** | 0.20 min (when required) | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Slightly Higher Carbon**: Maximum 0.17% for improved strength - **Manganese Content**: Up to 0.90% for strength enhancement - **Controlled Impurities**: Low phosphorus and sulfur limits - **Optional Copper**: For better atmospheric corrosion resistance --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 345 MPa (50,000 psi) min - **Yield Strength**: 185 MPa (27,000 psi) min - **Elongation in 200 mm (8 in)**: 25% min - **Elongation in 50 mm (2 in)**: 28% min **Hardness Properties:** - **Brinell Hardness**: 105-155 HB typical - **Rockwell Hardness**: 55-80 HRB typical --- #### **5. Physical Properties** | Property | Value | |----------|-------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | | **Shear Modulus** | 77 GPa (11,200 ksi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 52.5 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.7 × 10⁻⁶ /K (20-100°C) | | **Specific Heat Capacity** | 475 J/kg·K | | **Electrical Resistivity** | 0.17 μΩ·m | --- #### **6. Product Applications** **Structural Applications:** - Building frames and structural members - Bridge components and supports - Roof trusses and structural bracing - Platform and walkway fabrication - Structural base plates **Industrial Equipment:** - Machinery frames and bases - Equipment supports and stands - Conveyor system structures - Storage tank components - Industrial staircase stringers **Transportation & Infrastructure:** - Truck and trailer frames - Railroad car components - Shipping container parts - Highway guardrail supports - Sign support structures --- #### **7. Manufacturing & Fabrication** **Forming Characteristics:** - **Good Formability**: Suitable for bending and rolling - **Minimum Bend Radius**: 0.75 × thickness for 90° bends - **Shearing Quality**: Excellent for cutting operations - **Surface Finish**: Commercial hot-rolled finish **Welding Performance:** - **Excellent Weldability**: No special precautions required - **Welding Processes**: SMAW, GMAW, FCAW, GTAW - **Pre-heat**: Generally not required - **Filler Metals**: AWS E70XX series electrodes **Machining Operations:** - Good machinability with standard tooling - Suitable for drilling, tapping, and milling - Produces manageable chips with good surface finish --- #### **8. Quality Assurance & Testing** **Standard Tests:** - Chemical analysis (ladle analysis) - Tension test - Bend test (when specified) - Visual surface inspection **Additional Tests (when specified):** - Charpy impact test - Hardness test - Non-destructive testing - Dimensional verification --- #### **9. Corrosion Performance** - **Atmospheric Exposure**: Moderate corrosion resistance - **Protection Methods**: Painting, galvanizing, or coating - **Galvanizing Response**: Excellent for hot-dip galvanizing - **Maintenance**: Regular inspection and protective coating maintenance --- #### **10. Available Product Forms** **Standard Dimensions:** - **Thickness Range**: 1.6 mm to 200 mm (1/16" to 8") - **Width Range**: 600 mm to 3000 mm (24" to 120") - **Length Range**: 2000 mm to 12000 mm (80" to 480") **Available Conditions:** - Hot-rolled - Pickled and oiled - Galvanized - Primed or painted --- #### **11. Technical Specifications** **Dimensional Tolerances:** - **Thickness Tolerance**: ±0.25 mm to ±1.5 mm - **Width Tolerance**: +25 mm, -0 mm (+1", -0") - **Length Tolerance**: +50 mm, -0 mm (+2", -0") - **Flatness**: 15 mm/m maximum --- **Technical Notes:** - Provides approximately 12% higher yield strength than Grade A - Suitable for service temperatures down to -20°C (-4°F) - Not intended for pressure vessel applications - Excellent balance of strength and fabrication characteristics - Must comply with relevant structural design codes *This information is for reference purposes. For complete requirements and current specifications, consult the latest ASTM A283/A283M standard and applicable construction codes. Always verify material properties with certified mill test reports for structural applications.* -:- For detailed product information, please contact sales. -: ASTM A283 Steel, grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4238 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 A283 Steel, grade B Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A283 Steel Flange, grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A283 Steel Flange, grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A283 Steel Flange, grade B -:- 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 709 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