ASTM A588 HSLA Steel Sheet,Plate Grade D

ASTM A588 HSLA Steel Sheet/Plate Grade D, Thickness 125 to 200 mm (5-8 in.) Product Information -:- For detailed product information, please contact sales. -: ASTM A588 HSLA Steel Sheet/Plate Grade D, Thickness 125 to 200 mm (5-8 in.) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A588 HSLA Steel Grade D, Thickness 125 to 200 mm (5-8 in.) Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A588 Grade D: High-Strength Low-Alloy Structural Steel (Thickness 125-200 mm / 5-8 in.)** #### **1. Overview** ASTM A588 Grade D is a **high-strength low-alloy structural steel** in the very thick plate category (125-200 mm / 5-8 inches), specifically engineered for **heavy structural applications** requiring exceptional atmospheric corrosion resistance. This weathering steel, characterized by its unique phosphorus-enhanced composition, develops a dense, adherent protective oxide patina when exposed to corrosive environments, providing approximately **four times better corrosion resistance** than conventional carbon steels. Grade D maintains reliable performance in massive structural components while delivering superior durability in aggressive industrial and marine atmospheres. #### **2. Chemical Composition** The chemical composition is optimized for heavy section performance and maximum corrosion resistance: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.10 - 0.19 | | Manganese (Mn) | 0.90 - 1.25 | | Phosphorus (P) | 0.04 - 0.12 | | Sulfur (S) | 0.05 max | | Silicon (Si) | 0.15 - 0.30 | | Copper (Cu) | 0.25 - 0.40 | | Chromium (Cr) | 0.30 - 0.50 | | Nickel (Ni) | 0.25 - 0.50 | | Vanadium (V) | 0.01 - 0.10 | **Heavy Section Composition Features:** - **Phosphorus Enhancement System (0.04-0.12%)**: Provides maximum corrosion protection in thick sections - **Vanadium Strengthening**: Ensures effective precipitation hardening throughout thickness - **Optimized Alloy Balance**: Maintains consistent through-thickness corrosion resistance - **Enhanced Copper-Nickel**: Creates synergistic protection in severe environments #### **3. Physical & Mechanical Properties** **Mechanical Properties (for thickness 125-200 mm / 5-8 in.):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 63 ksi min (435 MPa min) | | **Yield Strength** | 42 ksi min (290 MPa min) | | **Elongation in 2 inches** | 21% min | | **Charpy V-Notch Impact** | 20 ft-lb min at +70°F (21°C) | **Thickness-Dependent Characteristics:** - **Controlled Strength Reduction**: Properly calibrated for structural design - **Maintained Ductility**: Consistent elongation performance across thickness range - **Enhanced Z-Direction Properties**: Reduced risk of lamellar tearing - **Superior Corrosion Performance**: Phosphorus effectiveness maintained in very thick sections **Physical Properties (Typical):** - **Density**: 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity**: 29,000 ksi (200 GPa) - **Poisson's Ratio**: 0.29 - **Coefficient of Thermal Expansion**: 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) - **Thermal Conductivity**: 41.0 W/m·K at 212°F (100°C) #### **4. Product Applications** Grade D in 125-200 mm thickness is specified for massive structural applications in corrosive environments: **Major Marine Structures:** - Coastal mega-bridge main girders and towers - Heavy harbor and port facility components - Marine terminal primary structural elements - Coastal defense and protection structures **Heavy Industrial Complexes:** - Chemical plant primary support frameworks - Heavy industrial facility main structures - Pollution control equipment massive supports - Industrial complex primary building components **Critical Infrastructure:** - Major highway bridges in severe corrosive environments - Coastal railway bridge heavy components - Critical urban infrastructure in aggressive atmospheres - Heavy transportation structures in de-icing salt regions #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 4952** | E460D | Heavy section weathering steel | | **Europe** | **EN 10025-5** | S355J2WP | Phosphorus-enhanced weathering steel | | **Japan** | **JIS G3125** | SPA-H | High weathering resistance steel | | **China** | **GB/T 4171** | Q355GNHP | Phosphorus-containing weathering steel | **A588 Grade D Property Progression:** | Thickness Range | Yield Strength min | Tensile Strength min | Strength Reduction | Corrosion Performance | |-----------------|-------------------|---------------------|-------------------|---------------------| | **100-125 mm** | 46 ksi (315 MPa) | 67 ksi (460 MPa) | 8% | Superior | | **125-200 mm** | 42 ksi (290 MPa) | 63 ksi (435 MPa) | 16% | Superior | | **200-300 mm** | 40 ksi (275 MPa) | 60 ksi (415 MPa) | 20% | Superior | #### **6. Fabrication & Quality Assurance** **Advanced Welding Technology:** - **Mandatory Pre-heat**: 350-550°F (175-290°C) based on exact thickness - **Special Welding Procedures**: Critical due to phosphorus content in thick sections - **Welding Processes**: SAW and FCAW preferred for heavy fabrications - **Consumables**: High-toughness, low-hydrogen electrodes required **Special Fabrication Requirements:** - **Thermal Cutting**: Pre-heat to 350-450°F (175-230°C) mandatory - **Stress Relieving**: Often specified for complex heavy fabrications - **Non-Destructive Testing**: Extensive UT and RT requirements - **Handling Systems**: Heavy-duty equipment and specialized rigging **Enhanced Quality Assurance:** - **Multiple Tension Tests**: From various locations and orientations - **Ultrasonic Examination**: 100% scanning typically required - **Z-Direction Testing**: Mandatory for critical applications - **Comprehensive Chemical Control**: Ensuring through-thickness consistency --- **Technical Advantages:** - **Exceptional corrosion resistance** maintained in very thick sections - **Superior performance** in severe marine and industrial environments - **Significant lifecycle cost savings** through eliminated painting - **Proven reliability** in international critical infrastructure projects **Design and Engineering Considerations:** - **Proper strength reduction** factors must be rigorously applied - **Thermal stress management** critical in very thick sections - **Heavy connection design** for optimal load transfer in corrosive environments - **Environmental assessment** essential for long-term performance **Service Performance:** - **Reliable patina development** even in very thick applications - **Consistent protection** across massive structural surfaces - **Structural monitoring** recommended for critical applications - **Minimal maintenance** requirements after protective patina establishment **Disclaimer:** This information represents specialized technical data for very thick plate applications in corrosive environments. For structural designs using 125-200 mm A588 Grade D steel, consultation with the latest ASTM specification and relevant structural codes is mandatory. Special attention must be given to welding procedures and fabrication techniques due to the enhanced phosphorus content in heavy sections. All fabrication must be performed by qualified specialists with experience in heavy steel construction in corrosive environments, and designs must be approved by professional structural engineers with expertise in heavy section weathering steel applications. -:- For detailed product information, please contact sales. -: ASTM A588 HSLA Steel Grade D, Thickness 125 to 200 mm (5-8 in.) Specification Dimensions Size： Diameter 20-1000 mm Length <4476 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 A588 HSLA Steel Grade D, Thickness 125 to 200 mm (5-8 in.) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A588 HSLA Steel Sheet,Plate Grade D, Thickness 125 to 200 mm (5-8 in.) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A588 HSLA Steel Sheet,Plate Grade D, Thickness 125 to 200 mm (5-8 in.) -:- For detailed product information, please contact sales. -:

Packing of ASTM A588 HSLA Steel Sheet/Plate Grade D, Thickness 125 to 200 mm (5-8 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 Sheet/Plate 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 947 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