Spherical ASTM A500 Steel Powder, grade A

ASTM A500 Steel Spherical Powder, grade A, Round Structural Tubing Product Information -:- For detailed product information, please contact sales. -: ASTM A500 Steel Spherical Powder, grade A, Round Structural Tubing Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical ASTM A500 Steel Powder, grade A characteristics -:- For detailed product information, please contact sales. -: Spherical ASTM A500 Steel Powder, grade A Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical ASTM A500 Steel Powder, grade A Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical ASTM A500 Steel Powder, grade A Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: ASTM A500 Steel, grade A, Round Structural Tubing Product Information -:- For detailed product information, please contact sales. -: # **Product Technical Datasheet: ASTM A500 Grade A - Round Structural Steel Tubing** ## **1. Product Overview** **ASTM A500 Grade A, Round** is a **cold-formed welded and seamless carbon steel structural tubing** manufactured to precise dimensional tolerances for **structural applications** in construction, infrastructure, and general manufacturing. As the most commonly specified grade for general structural purposes, it provides an optimal balance of strength, formability, and cost-effectiveness. The round cross-section offers excellent torsional resistance and uniform strength in all directions, making it ideal for columns, braces, and architectural elements. ## **2. Governing International Standard** - **Primary Standard:** **ASTM A500/A500M** - Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes - **Related Standards:** - **ASTM A501** - Hot-Formed Welded and Seamless Carbon Steel Structural Tubing - **EN 10210** - Hot-finished structural hollow sections (European equivalent) - **EN 10219** - Cold-formed welded structural hollow sections - **JIS G 3466** - Carbon steel square and rectangular tubes for general structure - **ISO 10799** - Cold-formed welded structural hollow sections ## **3. Chemical Composition** The composition is controlled for weldability and consistent mechanical properties: | Element | Maximum (%) | Typical Range (%) | Purpose | |---------|-------------|-------------------|---------| | **Carbon (C)** | 0.26 | 0.18-0.22 | Strength and weldability balance | | **Manganese (Mn)** | 1.35 | 0.75-1.05 | Strength enhancement, deoxidation | | **Phosphorus (P)** | 0.035 | 0.020-0.030 | Impurity control | | **Sulfur (S)** | 0.035 | 0.020-0.030 | Impurity control | | **Copper (Cu)** | 0.20 min* | 0.15-0.20 | Atmospheric corrosion resistance (when specified) | *Note: Copper requirement is optional unless specified for enhanced atmospheric corrosion resistance. **Key Features:** - **Balanced Chemistry:** Optimized for structural performance and fabricability - **Weldability:** Carbon Equivalent typically ≤0.45 - **No Mandatory Alloying:** Plain carbon steel composition - **Consistent Quality:** Tight chemical controls ensure uniform properties ## **4. Physical & Mechanical Properties** ### **Minimum Mechanical Properties (Per ASTM A500):** - **Tensile Strength:** 45 ksi min (310 MPa min) - **Yield Strength (0.2% Offset):** 39 ksi min (270 MPa min) - **Elongation in 2" (50 mm):** 25% min - **Yield-to-Tensile Ratio:** Typically 0.75-0.85 ### **Geometric Properties (Round Tubing):** - **Outside Diameters:** 0.375" to 20" (9.5 mm to 508 mm) - **Wall Thicknesses:** 0.028" to 0.625" (0.7 mm to 15.9 mm) - **Section Modulus:** S = π(D⁴ - d⁴)/(32D) - **Moment of Inertia:** I = π(D⁴ - d⁴)/64 - **Radius of Gyration:** r = √(D² + d²)/4 ### **Physical Constants:** - **Density:** 0.284 lb/in³ (7.85 g/cm³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Shear Modulus:** 11,200 ksi (77 GMPa) - **Poisson's Ratio:** 0.29 - **Coefficient of Thermal Expansion:** 6.5×10⁻⁶/°F (11.7×10⁻⁶/°C) ## **5. Manufacturing Processes** ### **Welded Tubing Production:** 1. **Strip Preparation:** Cold-rolled steel coil 2. **Forming:** Roll-formed into circular shape 3. **Welding:** High-frequency electric resistance welding (ERW) or submerged arc welding (SAW) 4. **Sizing:** Cold reduction to final dimensions 5. **Cutting:** To specified lengths 6. **Testing:** Non-destructive and mechanical testing ### **Seamless Tubing Production:** 1. **Billet Heating:** To rolling temperature 2. **Piercing:** Rotary piercing to create hollow shell 3. **Elongation:** Mandrel mill or plug mill process 4. **Sizing:** To final dimensions 5. **Heat Treatment:** As required for properties 6. **Finishing:** Straightening, cutting, testing ## **6. Key Characteristics & Performance Advantages** ### **Structural Advantages:** 1. **High Strength-to-Weight Ratio:** Efficient material utilization 2. **Uniform Strength:** Isotropic properties in all radial directions 3. **Excellent Torsional Resistance:** Superior to open sections 4. **Smooth Surface:** Minimal friction for fluid flow applications 5. **Aesthetic Appeal:** Clean, continuous appearance ### **Fabrication Benefits:** 1. **Excellent Weldability:** All standard welding processes applicable 2. **Good Formability:** Can be bent, flared, and swaged 3. **Easy Connection:** Simple end preparation for connections 4. **Surface Treatment:** Excellent for painting, galvanizing, powder coating 5. **Predictable Behavior:** Consistent material response ### **Design Flexibility:** 1. **Architectural Applications:** Exposed structural elements 2. **Space Frame Construction:** Efficient nodal connections 3. **Modular Systems:** Standardized component manufacturing 4. **Custom Fabrication:** Adaptable to complex geometries ## **7. Typical Applications** ### **Building & Construction:** - **Structural Columns:** Round columns in commercial and industrial buildings - **Architectural Features:** Exposed structural elements, handrails, balustrades - **Space Frames:** Lightweight roof and canopy structures - **Bracing Systems:** Diagonal and horizontal bracing members - **Curtain Wall Systems:** Structural supports for glazing systems ### **Infrastructure:** - **Highway Sign Supports:** Breakaway and non-breakaway sign structures - **Light Poles:** Street lighting and area lighting standards - **Guardrail Systems:** Highway safety barriers and terminals - **Bridge Components:** Handrails, bracing, and decorative elements ### **Industrial & Manufacturing:** - **Equipment Frames:** Machinery bases and protective structures - **Material Handling:** Conveyor supports, racking systems - **Process Equipment:** Structural supports for piping and vessels - **Agricultural Equipment:** Implement frames and structures ### **Commercial Products:** - **Playground Equipment:** Swings, climbers, and structural frames - **Outdoor Furniture:** Park benches, tables, and shelters - **Retail Displays:** Merchandising fixtures and signage supports - **Recreational Equipment:** Bicycle frames, fitness equipment ## **8. Design & Engineering Considerations** ### **Structural Design (Per AISC):** - **Allowable Stress Design:** Fb = 0.66Fy (bending), Fa per column formulas - **Load & Resistance Factor Design:** φ = 0.90 (flexure), φ = 0.85 (compression) - **Local Buckling:** Check for D/t ratios per specification limits - **Connection Design:** Consider shear lag and effective net area ### **Connection Methods:** 1. **Welded Connections:** Full penetration or fillet welds 2. **Bolted Connections:** Through-bolting with plates or brackets 3. **Mechanical Connections:** Set screws, pins, or clamps 4. **Adhesive Bonding:** For specialized applications ### **Corrosion Protection:** - **Hot-Dip Galvanizing:** ASTM A123 compliance - **Painting:** Surface preparation per SSPC standards - **Powder Coating:** Durable finish for architectural applications - **Weathering Steel:** Alternative material selection for certain applications ## **9. Quality Control & Testing** ### **Mandatory Testing:** - **Chemical Analysis:** Heat or product analysis - **Tensile Testing:** One test per heat for welded, more for seamless - **Flattening Test:** For welded tubing to verify weld quality - **Reverse Bend Test:** Alternative to flattening test - **NDT:** Electric test or hydrostatic test as specified ### **Optional Testing:** - **Charpy Impact Testing:** For low-temperature applications - **Hardness Testing:** Verification of material properties - **Dimensional Inspection:** OD, wall thickness, straightness - **Surface Quality:** Visual inspection for defects ## **10. Comparison with Other Grades** | Property | Grade A | Grade B | Grade C | Grade D | |----------|---------|---------|---------|---------| | **Yield Strength** | 39 ksi | 46 ksi | 50 ksi | 36 ksi | | **Tensile Strength** | 45 ksi | 58 ksi | 62 ksi | 58 ksi | | **Elongation** | 25% | 23% | 21% | 23% | | **Carbon Max** | 0.26% | 0.26% | 0.23% | 0.27% | | **Typical Use** | General structural | Higher strength | Highest strength | Seamless preference | ## **11. Fabrication Guidelines** ### **Cutting & Machining:** - **Saw Cutting:** Band saws or cold saws for straight cuts - **Plasma Cutting:** For complex shapes and bevels - **Laser Cutting:** Precision cutting for high-volume production - **Drilling & Punching:** Standard practices with proper tooling ### **Forming Operations:** - **Bending:** Minimum bend radius typically 3× OD - **Flaring:** For mechanical connections - **Swaging:** Diameter reduction for telescoping fits - **Notching:** For intersecting member connections ### **Welding Procedures:** - **Process Selection:** GMAW, FCAW, SMAW all suitable - **Preheat:** Generally not required for thicknesses < 1" - **Filler Metal:** E70XX electrodes or ER70S-6 wire - **Post-Weld Treatment:** Grinding for smooth transitions ## **12. Storage & Handling** ### **Storage Requirements:** - **Indoor Storage:** Preferred to prevent rust formation - **Outdoor Storage:** Elevated, covered, with good drainage - **Stacking:** Proper supports to prevent bending or distortion - **Identification:** Maintain heat/lot traceability ### **Handling Best Practices:** - **Lifting:** Use appropriate spreader bars and slings - **Transportation:** Secure properly to prevent damage - **Surface Protection:** Avoid dragging or impact damage - **Corrosion Prevention:** Keep dry and clean ## **13. Sustainability & Environmental** ### **Environmental Benefits:** - **Recyclability:** 100% recyclable with existing infrastructure - **Material Efficiency:** High strength-to-weight ratio reduces material use - **Long Service Life:** Durable with proper protection - **Low Maintenance:** Minimal ongoing requirements ### **Life Cycle Considerations:** - **Embodied Energy:** Lower than many alternative materials - **Design for Disassembly:** Facilitates reuse and recycling - **Sustainable Coatings:** Environmentally friendly coating options - **Local Sourcing:** Reduced transportation impacts ## **14. Global Market Context** ### **International Equivalents:** - **Europe:** EN 10219 S235JRH (similar strength level) - **Canada:** CSA G40.21 44W (similar properties) - **Australia:** AS 1163 C350 (comparable grade) - **General:** Widely recognized and accepted globally ### **Industry Position:** - **Market Leader:** Most commonly specified structural tubing grade - **Proven Performance:** Extensive track record in diverse applications - **Code Acceptance:** Recognized in all major building codes - **Supply Chain:** Widely available from multiple producers ## **15. Limitations & Special Considerations** ### **Design Limitations:** - **Not for Pressure Applications:** Use ASTM A53 or A106 for pressure piping - **Temperature Limits:** Not for sustained service >650°F (343°C) - **Corrosion Environments:** Requires protection in aggressive conditions - **Fatigue Applications:** Consider Grade B or C for cyclic loading ### **Fabrication Considerations:** - **Weld Quality:** Critical for structural integrity - **Connection Design:** Requires careful detailing - **Tolerance Stack-up:** Consider in modular construction - **Field Modification:** More challenging than open sections ## **16. Technical Recommendations** ### **When to Specify Grade A:** 1. **General Structural Applications:** Where 39 ksi yield is adequate 2. **Architectural Exposures:** Where appearance is important 3. **Moderate Loading Conditions:** Typical building loads 4. **Cost-Sensitive Projects:** Where material cost is a primary factor 5. **Fabrication-Intensive Applications:** Where formability is critical ### **Alternative Considerations:** - **Grade B:** When higher strength is needed without significant cost increase - **Grade C:** For maximum strength requirements - **Rectangular Tubing:** When flat surfaces are needed for connections - **HSS:** Alternative terminology for structural tubing ## **17. Summary** **ASTM A500 Grade A Round Structural Tubing** represents the **foundational grade for general structural applications**, offering an **optimal balance of strength, fabricability, and cost-effectiveness**. Its circular cross-section provides **uniform mechanical properties in all directions**, making it particularly suitable for **columns, bracing members, and architectural applications** where torsional resistance and aesthetic appearance are important. As the **most widely specified grade** in the A500 family, it benefits from extensive **industry experience, code recognition, and manufacturing consistency**. Engineers and fabricators have developed proven design methodologies and fabrication techniques that maximize its performance while minimizing costs. For projects requiring **reliable structural performance with straightforward fabrication** and where premium strength grades are not justified by loading conditions, **ASTM A500 Grade A Round Tubing provides an excellent technical and economic solution**. Its versatility, availability, and proven track record make it a **default choice for countless structural applications** across construction, infrastructure, and manufacturing sectors worldwide. -:- For detailed product information, please contact sales. -: ASTM A500 Steel, grade A, Round Structural Tubing Specification Dimensions Size： Diameter 20-1000 mm Length <5900 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 A, Round Structural Tubing Properties -:- For detailed product information, please contact sales. -:

Spherical ASTM A500 Steel Powder, grade A Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical ASTM A500 Steel Powder, grade A -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of ASTM A500 Steel Spherical Powder, grade A, Round Structural Tubing -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A500 Steel Spherical Powder, grade A, Round Structural Tubing -:- For detailed product information, please contact sales. -:

Packing of ASTM A500 Steel Spherical Powder, grade A, 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 Spherical Powder 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 2371 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