ASTM A533 Low Alloy Steel Flange, Grade D, Class 3

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel Flange, Grade D, Class 3 Product Information -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel Flange, Grade D, Class 3 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A533 Low Alloy Steel, Grade D, Class 3 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A533 Grade D Class 3: Premium High-Strength Manganese-Nickel-Molybdenum Alloy Steel Plate** #### **1. Overview** ASTM A533 Grade D Class 3 represents the **highest strength tier** within the Grade D classification, delivering exceptional mechanical performance for the most demanding pressure vessel applications. This advanced steel plate combines **maximum strength attainment** with **retained toughness characteristics**, specifically engineered for critical nuclear components and heavy-wall pressure vessels where structural efficiency and reliability under extreme conditions are paramount. #### **2. Chemical Composition** Precision-controlled chemistry optimized for high-strength applications: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.20 max | | Manganese (Mn) | 1.20 - 1.60 | | Phosphorus (P) | 0.025 max | | Sulfur (S) | 0.025 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 0.70 - 1.00 | | Molybdenum (Mo) | 0.45 - 0.60 | | Vanadium (V) | 0.05 max (optional) | **Premium Metallurgical Design:** - **Optimized Carbon-Manganese Balance**: Enables maximum strength development while maintaining essential toughness - **Enhanced Nickel Contribution**: Provides crucial toughness retention at high strength levels - **Molybdenum Strengthening**: Ensures tempering resistance and elevated temperature performance - **Optional Vanadium Addition**: For additional precipitation strengthening in heavy sections #### **3. Physical & Mechanical Properties** **Mechanical Properties (Up to 2½ inches / 63 mm thickness):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 100 - 115 ksi (690 - 795 MPa) | | **Yield Strength** | 85 ksi min (585 MPa min) | | **Elongation in 2 inches** | 14% min | | **Reduction of Area** | 35% min | | **Charpy V-Notch Impact** | 35 ft-lb min at -75°F (-60°C) | **Thickness Performance Capability:** - **Maximum thickness**: 12 inches (305 mm) - **Thickness 2½-4 inches**: Yield strength minimum 80 ksi (550 MPa) - **Thickness 4-6 inches**: Yield strength minimum 75 ksi (515 MPa) - **Special processing required** for sections exceeding 6 inches **Advanced Physical Characteristics:** - **Density**: 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity**: 29,000 ksi (200 GPa) - **Thermal Expansion Coefficient**: 6.2 × 10⁻⁶/°F (11.2 × 10⁻⁶/°C) - **Thermal Conductivity**: 33.5 W/m·K at 100°C #### **4. Product Applications** Grade D Class 3 is reserved for the most critical high-strength applications: **Nuclear Power Excellence:** - Heavy-wall reactor pressure vessel sections - Advanced nuclear plant primary components - High-stress nuclear containment structures - Next-generation reactor systems **High-Pressure Technology:** - Ultra-high pressure chemical reactors - Advanced hydrogen storage systems - Critical energy industry components - State-of-the-art process vessels **Specialized High-Performance Applications:** - Advanced power generation equipment - Critical research facility components - Specialized industrial pressure systems - Cutting-edge energy technology vessels #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 15MnNi63 | High-strength variant | | **Europe** | **EN 10028-2** | 15MnNi63 | Premium quality equivalent | | **Japan** | **JIS G3120** | SOV 6C | Highest grade nuclear quality | | **Germany** | **DIN 17155** | 15MnNi63 | Historical premium designation | **Complete Grade D Performance Hierarchy:** | Parameter | Class 1 | Class 2 | Class 3 | |-----------|---------|---------|---------| | **Yield Strength** | 50 ksi | 70 ksi | 85 ksi | | **Tensile Strength** | 80-100 ksi | 90-110 ksi | 100-115 ksi | | **Toughness Focus** | Maximum | Balanced | High-Strength Premium | #### **6. Fabrication & Quality Excellence** **Advanced Welding Technology:** - **Specialized welding procedures** for high-strength applications - **Precision pre-heat control**: 350-450°F (177-232°C) - **Sophisticated interpass management**: 450-550°F (232-288°C) - **Optimized PWHT**: 1125-1175°F (607-635°C) for property restoration - **High-performance consumables**: Specifically formulated for Class 3 requirements **State-of-the-Art Heat Treatment:** - **Advanced austenitizing control**: 1625±25°F (885±14°C) - **Precision quenching technology**: Optimized cooling rate management - **Multiple-stage tempering**: For optimal strength-toughness balance - **Real-time process monitoring**: Comprehensive digital verification **Uncompromising Quality Assurance:** - **Advanced ultrasonic examination**: Phased array or TOFD methods - **Comprehensive mechanical testing**: Including advanced fracture mechanics - **Metallurgical verification**: Sophisticated microstructural analysis - **Complete digital traceability**: Advanced documentation systems --- **Breakthrough Performance Advantages:** - **Maximum strength capability** within Grade D classification - **Superior toughness retention** at elevated strength levels - **Exceptional consistency** in ultra-heavy sections - **Proven reliability** in extreme operating environments **Engineering Excellence Requirements:** - **Advanced fracture mechanics analysis** employing latest methodologies - **Comprehensive stress analysis** for high-pressure applications - **Sophisticated thermal-mechanical assessment** - **State-of-the-art fatigue and fracture evaluation** **Nuclear Quality Leadership:** - **Zero-compromise compliance** with ASME Section III requirements - **Cutting-edge NDE technology** implementation - **Comprehensive quality management systems** - **World-class manufacturing excellence** **Disclaimer:** This information represents the highest standard of technical reference for ASTM A533 Grade D Class 3. For nuclear and other ultra-critical applications, absolute adherence to the latest ASTM specifications and applicable codes (ASME Section III) is mandatory. All activities must be directed by exceptionally qualified engineers and subject to rigorous regulatory oversight and quality assurance protocols. -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel, Grade D, Class 3 Specification Dimensions Size： Diameter 20-1000 mm Length <4434 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 A533 Low Alloy Steel, Grade D, Class 3 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A533 Low Alloy Steel Flange, Grade D, Class 3 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A533 Low Alloy Steel Flange, Grade D, Class 3 -:- For detailed product information, please contact sales. -:

Packing of ASTM A533 Low Alloy Steel Flange, Grade D, Class 3 -:- 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 Flange 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 905 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