ASTM A500 Steel Seamless tube, grade B

ASTM A500 Steel Seamless tube, grade B, round structural tubing Product Information -:- For detailed product information, please contact sales. -: ASTM A500 Steel Seamless tube, grade B, round structural tubing Synonyms -:- For detailed product information, please contact sales. -:

ASTM A500 Steel, grade B, round structural tubing Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A500 Steel, Grade B, Round Structural Tubing** --- #### **1. Product Overview** ASTM A500 Grade B Round Structural Tubing is a **cold-formed welded carbon steel structural tubing** offering enhanced mechanical properties compared to Grade A. As the most commonly specified grade in the A500 standard, Grade B provides an optimal balance of higher strength, good formability, and excellent weldability, making it suitable for a wide range of structural applications in construction, infrastructure, and industrial projects. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A500 Grade B (Round)** | | **UNS Number** | **K03002** | | **ISO International Standard** | **ISO 10799** | | **European Norm (EN)** | **EN 10219-1 S355J0H** | | **Canadian Standards Association** | **CSA G40.21 350W** | | **Japanese (JIS)** | **G 3475 STK500** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.26 max | | **Manganese (Mn)** | 1.35 max | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Copper (Cu)** | 0.20 min (when required) | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Controlled Carbon Content**: Maximum 0.26% for weldability and formability - **Enhanced Manganese**: Up to 1.35% for improved strength - **Standard Impurity Control**: Low phosphorus and sulfur limits - **Copper Option**: Available for better atmospheric corrosion resistance --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 400 MPa (58,000 psi) min - **Yield Strength**: 290 MPa (42,000 psi) min - **Elongation in 50 mm (2 in)**: 23% min **Hardness Properties:** - **Brinell Hardness**: 115-165 HB typical **Structural Properties:** - **Compressive Strength**: Excellent for column and load-bearing applications - **Torsional Resistance**: Superior to open structural sections - **Bending Strength**: Good for curved and arched structural members --- #### **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** | 51.5 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.6 × 10⁻⁶ /K (20-100°C) | | **Specific Heat Capacity** | 470 J/kg·K | --- #### **6. Product Applications** **Structural Construction:** - **Building Framing**: Primary and secondary structural members - **Column Applications**: High-strength compression members - **Truss Systems**: Chord and web members in roof and floor trusses - **Space Frames**: Three-dimensional structural systems **Industrial Applications:** - **Heavy Equipment Frames**: Machinery and equipment structural components - **Material Handling Systems**: Conveyor supports and equipment frames - **Industrial Platforms**: Walkways, catwalks, and support structures - **Storage Systems**: Heavy-duty racking and storage structures **Infrastructure Projects:** - **Bridge Components**: Structural members in pedestrian and vehicular bridges - **Transmission Towers**: Support structures for utility lines - **Highway Structures**: Sign supports, lighting standards, guardrail systems - **Marine Structures**: Dock facilities and waterfront structures --- #### **7. Manufacturing & Fabrication** **Forming Characteristics:** - **Good Formability**: Suitable for bending and cold-forming operations - **Minimum Bend Radius**: 3.0 × outside diameter for cold bending - **Surface Quality**: High-quality welded finish with minimal seam visibility - **Dimensional Accuracy**: Excellent for precision structural applications **Welding Performance:** - **Excellent Weldability**: All common welding processes applicable - **Recommended Processes**: GMAW, FCAW, SMAW - **Pre-heat**: Generally not required for most applications - **Filler Metals**: AWS E70XX series electrodes recommended **Fabrication Capabilities:** - **Machining**: Good machinability with proper tooling - **Cutting**: Excellent results with sawing, abrasive cutting, or plasma cutting - **Connection Methods**: Suitable for both welded and bolted connections - **Surface Preparation**: Excellent for painting and coating systems --- #### **8. Quality Assurance & Testing** **Standard Tests:** - Chemical analysis per heat - Tension test - Flattening test - Bend test (when specified) - Visual and dimensional inspection **Enhanced Testing:** - Hardness testing - Impact testing (when specified) - Non-destructive examination - Surface quality verification --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Good resistance in normal environments - **Protection Systems**: Compatible with painting, galvanizing, and powder coating - **Maintenance**: Regular inspection and protective coating maintenance - **Service Life**: Extended lifespan with proper corrosion protection --- #### **10. Available Product Forms** **Standard Size Range:** - **Outside Diameter**: 12.7 mm to 457 mm (0.500" to 18.000") - **Wall Thickness**: 1.2 mm to 12.7 mm (0.047" to 0.500") - **Lengths**: Standard random lengths or custom cut lengths **Surface Conditions:** - Black (as-welded) - Pickled and oiled - Galvanized (after fabrication) - Pre-finished coatings available --- #### **11. Technical Specifications** **Dimensional Tolerances:** - **Outside Diameter Tolerance**: ±0.5% of nominal diameter - **Wall Thickness Tolerance**: ±10% - **Length Tolerance**: +6 mm, -0 mm (+1/4", -0") - **Straightness**: 1.6 mm per meter (0.019 in per foot) maximum **Structural Design Properties:** - **Section Modulus**: Uniform in all directions - **Moment of Inertia**: Equal about all axes - **Radius of Gyration**: Consistent for buckling calculations - **Torsional Constant**: Superior to equivalent open sections --- **Technical Notes:** - Grade B provides approximately 26% higher yield strength than Grade A - Most widely specified grade for general structural applications - Excellent strength-to-weight ratio for efficient structural design - Suitable for both static and dynamic loading conditions - Must comply with AISC (American Institute of Steel Construction) specifications - Design should consider local buckling for slender compression elements *This information is for reference purposes. For complete technical requirements and design specifications, consult the latest ASTM A500 standard, AISC Steel Construction Manual, and applicable building codes. Professional engineering design required for all structural applications.* -:- For detailed product information, please contact sales. -: ASTM A500 Steel, grade B, round structural tubing Specification Dimensions Size： Diameter 20-1000 mm Length <4258 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 A500 Steel, grade B, round structural tubing Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A500 Steel Seamless tube, grade B, round structural tubing -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A500 Steel Seamless tube, grade B, round structural tubing -:- For detailed product information, please contact sales. -:

Packing of ASTM A500 Steel Seamless tube, grade B, round structural tubing -:- 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 729 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