ASTM A633 HSLA Steel Seamless tube Grade A

ASTM A633 HSLA Steel Seamless tube Grade A, Thickness < 100 mm (4 in.) Product Information -:- For detailed product information, please contact sales. -: ASTM A633 HSLA Steel Seamless tube Grade A, Thickness < 100 mm (4 in.) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A633 HSLA Steel Grade A, Thickness < 100 mm (4 in.) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A633 High-Strength Low-Alloy Structural Steel, Grade A (Thickness < 100 mm)** **ASTM A633** is a comprehensive standard specification for **high-strength low-alloy (HSLA) structural steel plates** intended for use in welded, bolted, or riveted structures where improved toughness and atmospheric corrosion resistance are desired. **Grade A** represents a normalized HSLA steel offering enhanced mechanical properties over standard carbon structural steels, making it particularly suitable for construction in environments where moderate low-temperature service is required. The thickness range **below 100 mm (4 inches)** represents the most commonly used plate thickness for structural applications, where the combination of strength and toughness is most critical. --- #### **1. Key International Standards** * **Primary Standard:** **ASTM A633 / A633M** - Standard Specification for Normalized High-Strength Low-Alloy Structural Steel Plates * **Related/Alternative Standards:** * **ASTM A572 / A572M:** High-Strength Low-Alloy Columbium-Vanadium Steels (a more common alternative, but not always normalized). * **ASTM A709 / A709M:** Standard Specification for Structural Steel for Bridges (often incorporates similar grades). * **EN 10025-4:** Hot rolled products of structural steels - Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels. * **ISO 4950:** High yield strength steel plates and wide flats. * **JIS G 3114:** Hot-rolled atmospheric corrosion resisting steels for welded structure. --- #### **2. Chemical Composition (Heat Analysis)** The chemical composition of Grade A is designed to achieve the specified mechanical properties in the normalized condition through the use of microalloying elements. | Element | Composition (%) - Maximum (unless range is shown) | | :--- | :--- | | **Carbon (C)** | 0.18 | | **Manganese (Mn)** | 0.90 - 1.35 | | **Phosphorus (P)** | 0.04 | | **Sulfur (S)** | 0.05 | | **Silicon (Si)** | 0.15 - 0.50 | | **Copper (Cu)** | 0.20 (min) | | **Columbium (Cb)** | 0.005 - 0.05 | | **Vanadium (V)** | 0.01 - 0.10 | *Note: The combination of **Columbium (Niobium)** and/or **Vanadium** provides grain refinement and precipitation strengthening during the normalizing heat treatment. The minimum **Copper** content enhances atmospheric corrosion resistance.* --- #### **3. Mechanical & Physical Properties (for Thickness < 100 mm)** The normalizing heat treatment (heating to a suitable temperature and air cooling) results in a refined grain structure, which improves both strength and toughness. **Mechanical Properties:** | Property | Value | Unit | | :--- | :--- | :--- | | **Yield Strength (min)** | 42 | ksi (290 MPa) | | **Tensile Strength (min)** | 63 | ksi (435 MPa) | | **Elongation in 2 in. (50 mm) (min)** | 23 | % | | **Charpy V-Notch Impact Test** | 15 ft-lb @ -75°F | (20 J @ -60°C) | **Physical Properties (Typical):** * **Density:** 0.284 lb/in³ (7850 kg/m³) * **Modulus of Elasticity:** 29,000 ksi (200 GPa) * **Poisson's Ratio:** 0.29 * **Coefficient of Thermal Expansion:** 6.5 x 10⁻⁶ /°F (11.7 x 10⁻⁶ /°C) * **Thermal Conductivity:** ~42 W/m·K (at 100°C) --- #### **4. Product Applications** ASTM A633 Grade A is widely used in structural applications where higher strength and better low-temperature toughness than carbon steel are required without the cost of quenched and tempered grades. * **Building Construction:** Columns, beams, and trusses in industrial plants, warehouses, and high-rise buildings. * **Bridge Construction:** Girders, support members, and other structural components. * **Mining and Quarrying Equipment:** Structural frames, buckets, and support structures. * **Heavy-Duty Machinery:** Frames and booms for cranes, excavators, and other equipment. * **Transmission Towers and Poles:** For electrical power distribution. --- #### **5. Key Advantages** * **Enhanced Toughness:** The normalized microstructure provides excellent impact toughness, making it suitable for low-temperature service down to -75°F (-60°C). * **Higher Strength-to-Weight Ratio:** Allows for lighter, more economical structures compared to those built with conventional carbon steels. * **Good Weldability:** The carefully controlled chemistry, particularly the carbon content, results in good weldability with standard procedures. * **Improved Atmospheric Corrosion Resistance:** The copper content provides better resistance to atmospheric corrosion compared to carbon steels. * **Normalized Condition:** Ensures uniform and consistent mechanical properties throughout the plate thickness. -:- For detailed product information, please contact sales. -: ASTM A633 HSLA Steel Grade A, Thickness < 100 mm (4 in.) Specification Dimensions Size： Diameter 20-1000 mm Length <4499 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 A633 HSLA Steel Grade A, Thickness < 100 mm (4 in.) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A633 HSLA Steel Seamless tube Grade A, Thickness < 100 mm (4 in.) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A633 HSLA Steel Seamless tube Grade A, Thickness < 100 mm (4 in.) -:- For detailed product information, please contact sales. -:

Packing of ASTM A633 HSLA Steel Seamless tube Grade A, Thickness < 100 mm (4 in.) -:- 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 970 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