ASTM A283 Steel Seamless tube, grade B

ASTM A283 Steel Seamless tube, grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A283 Steel Seamless tube, 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 Seamless tube, grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A283 Steel Seamless tube, grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A283 Steel Seamless tube, 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 Seamless tube 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