ASTM A440 Steel Rod/Bar

ASTM A440 Steel Rod, plate, bar, and shapes under 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ASTM A440 Steel Rod, plate, bar, and shapes under 19 mm thick Synonyms -:- For detailed product information, please contact sales. -:

ASTM A440 Steel, plate, bar, and shapes under 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A440 High-Strength Steel (Plates, Bars, and Shapes under 19 mm thick)** **1. Overview** ASTM A440 is a standard specification for high-strength, non-alloy steel plates, bars, and shapes with thicknesses under 19 mm (3/4 inch). This steel grade is specifically designed to provide enhanced strength and atmospheric corrosion resistance compared to conventional carbon steels, making it suitable for structural applications where both high strength and durability are required. **2. Key International Standards** * **Primary Standard:** **ASTM A440/A440M** - Standard Specification for High-Strength Steel (Plates, Bars, and Shapes under 3/4 in. [19 mm] thick) * **Related Standards:** * **ASTM A6/A6M:** Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling * **ASTM A709:** Standard Specification for Structural Steel for Bridges (includes grades with similar properties) * **International Equivalents:** * **EN 10025:** S355J0/J2 (European structural steel equivalents) * **JIS G3106:** SM490 (Japanese structural steel) * **GB/T 1591:** Q345 (Chinese high-strength low-alloy structural steel) **3. Chemical Composition (Weight %)** The chemical composition is carefully balanced to achieve high strength while maintaining good weldability and formability: | Element | Composition (%) | | :---------------- | :---------------------------------- | | Carbon (C), max | 0.28 | | Manganese (Mn) | 0.60 - 0.90 | | Phosphorus (P), max | 0.035 | | Sulfur (S), max | 0.040 | | Silicon (Si) | 0.15 - 0.30 | | Copper (Cu), min | 0.20 (for enhanced corrosion resistance) | *Note: The copper content provides improved atmospheric corrosion resistance, while the balanced carbon and manganese ensure high strength.* **4. Mechanical & Physical Properties** **Mechanical Properties (at room temperature):** | Property | Value | | :--- | :--- | | Tensile Strength | 550 MPa min (80 ksi min) | | Yield Strength | 345 MPa min (50 ksi min) | | Elongation in 2 in. (50 mm), (min) | 18% | | **Hardness (typical)** | **~180-220 HB** | **Physical Properties:** * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** 200 GPa (29 × 10⁶ psi) * **Thermal Conductivity:** ~48.0 W/m·K (at 100°C) * **Coefficient of Thermal Expansion:** ~11.5 × 10⁻⁶/K (20-100°C) * **Poisson's Ratio:** 0.29 **5. Product Applications** ASTM A440 steel is widely used in various structural applications requiring high strength and good corrosion resistance: * **Building Construction:** Structural frames, beams, and columns * **Bridge Components:** Structural members in bridge construction * **Heavy Equipment:** Construction and mining equipment frames * **Transmission Towers:** Electrical transmission tower structures * **Industrial Structures:** Support structures and frameworks * **Material Handling Equipment:** Crane booms and support structures **6. Key Characteristics & Advantages** * **High Strength-to-Weight Ratio:** Enables lighter, more efficient structures * **Atmospheric Corrosion Resistance:** Copper content provides 2-4 times better corrosion resistance than carbon steel * **Good Weldability:** Can be welded using standard procedures with proper precautions * **Excellent Formability:** Suitable for bending and forming operations * **Cost-Effective:** Provides high strength without the cost of alloy steels **7. Fabrication Considerations** * **Welding:** Requires proper pre-heating and controlled heat input * **Forming:** Good cold forming characteristics within recommended radii * **Cutting:** All standard cutting methods applicable * **Heat Treatment:** Typically used in as-rolled condition * **Surface Preparation:** Requires proper surface treatment for maximum corrosion resistance ASTM A440 represents an economical high-strength structural steel option, providing an optimal balance of mechanical properties, corrosion resistance, and fabricability for demanding structural applications in various industrial sectors. -:- For detailed product information, please contact sales. -: ASTM A440 Steel, plate, bar, and shapes under 19 mm thick Specification Dimensions Size： Diameter 20-1000 mm Length <4387 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 A440 Steel, plate, bar, and shapes under 19 mm thick Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A440 Steel Rod, plate, bar, and shapes under 19 mm thick -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A440 Steel Rod, plate, bar, and shapes under 19 mm thick -:- For detailed product information, please contact sales. -:

Packing of ASTM A440 Steel Rod, plate, bar, and shapes under 19 mm thick -:- 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 Rod 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 858 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