ASTM A533 Low Alloy Steel Flange, Grade C, 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 C, Class 3 Product Information -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel Flange, Grade C, Class 3 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A533 Low Alloy Steel, Grade C, Class 3 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A533 Grade C Class 3: Premium High-Strength Nickel-Alloy Steel Plate** #### **1. Overview** ASTM A533 Grade C Class 3 represents the **pinnacle of high-strength, high-toughness** steel plate technology within the ASTM A533 specification. This premium grade combines the highest nickel content (Grade C) with optimized heat treatment to deliver **exceptional strength levels while maintaining remarkable toughness** - a critical combination for the most demanding nuclear, cryogenic, and high-pressure applications where component failure is not an option. #### **2. Chemical Composition** Precisely controlled chemistry for maximum performance: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.25 max | | Manganese (Mn) | 1.15 - 1.50 | | Phosphorus (P) | 0.025 max | | Sulfur (S) | 0.025 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 2.75 - 3.25 | | Molybdenum (Mo) | 0.45 - 0.60 | | Vanadium (V) | 0.05 max (optional) | **Premium Metallurgical Features:** - **Maximum Nickel (2.75-3.25%)**: Unparalleled low-temperature toughness retention at high strength levels - **Enhanced Manganese (1.15-1.50%)**: Critical for achieving required hardenability in thick sections - **Ultra-Restricted Impurities**: 0.025% max P and S ensure superior fracture resistance - **Optional Vanadium**: For additional grain refinement and precipitation strengthening #### **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) | **Advanced Property Capabilities:** - **Typical CVN values**: Often exceed 50-60 ft-lb at -75°F in production - **Exceptional K_Ic values**: High fracture toughness maintained at ultra-low temperatures - **Superior through-thickness properties**: Minimal property degradation in heavy sections - **Excellent fatigue performance**: Enhanced resistance to cyclic loading **Physical Properties (Typical):** - **Density:** 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Thermal Expansion:** 6.0 × 10⁻⁶/°F (10.8 × 10⁻⁶/°C) at 68-212°F - **Poisson's Ratio:** 0.29 #### **4. Product Applications** Reserved for the most critical applications where performance is non-negotiable: **Nuclear Power Excellence:** - Advanced reactor pressure vessel critical sections - Next-generation nuclear plant components - Nuclear primary circuit high-stress regions - Safety-critical containment structures **Cryogenic Leadership:** - LNG carrier inner hull structural members - Liquid hydrogen storage and transport vessels - Cryogenic research facility components - Superconducting system support structures **High-Pressure Innovation:** - Ultra-high pressure hydrogen reactors (>1000 bar) - Advanced chemical synthesis converters - Critical energy storage system components - Cutting-edge research pressure vessels #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 12Ni19 | High-strength variant | | **Europe** | **EN 10028-2** | 12Ni19 | Premium quality equivalent | | **Japan** | **JIS G3120** | SOV 5C | Highest grade nuclear quality | | **Germany** | **DIN 17155** | 12Ni19 | Historical premium grade | **Complete Grade C Performance Spectrum:** | 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:** - **Special high-nickel electrodes**: Custom formulated for strength-toughness matching - **Precision pre-heat**: 350-450°F (177-232°C) with strict monitoring - **Sophisticated interpass control**: 450-550°F (232-288°C) maximum - **Optimized PWHT**: 1125-1175°F (607-635°C) for property restoration **State-of-the-Art Heat Treatment:** - **Computer-controlled austenitizing**: 1625±25°F (885±14°C) - **Advanced quenching technology**: Precise cooling rate optimization - **Multiple-stage tempering**: For optimal property development - **Real-time monitoring**: Full digital recording and verification **Uncompromising Quality Assurance:** - **Advanced ultrasonic examination**: Phased array or TOFD methods - **Comprehensive mechanical testing**: Including J-integral fracture toughness - **Metallurgical verification**: Advanced microstructural analysis - **Complete digital traceability**: Blockchain-enabled documentation --- **Breakthrough Advantages:** - **Unmatched strength-toughness combination** at cryogenic temperatures - **Superior radiation resistance** for extended nuclear service life - **Exceptional property consistency** in ultra-heavy sections - **Proven reliability** in most extreme operating environments **Engineering Excellence Requirements:** - **Advanced fracture mechanics analysis** employing latest methodologies - **Comprehensive radiation damage modeling** for nuclear applications - **Sophisticated thermal-structural analysis** for cryogenic service - **State-of-the-art fatigue and fracture assessment** **Nuclear Quality Leadership:** - **Zero-compromise compliance** with ASME Section III requirements - **Cutting-edge NDE technology** implementation - **Comprehensive radiation surveillance** and life prediction programs - **World-class documentation** and quality management systems **Disclaimer:** This information represents the highest standard of technical reference. For nuclear, cryogenic, and other ultra-critical applications, absolute adherence to the latest ASTM A533 specification and applicable codes (ASME Section III, Section VIII Division 2, 3) is mandatory. All activities must be directed by exceptionally qualified engineers and subject to rigorous regulatory oversight. -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel, Grade C, Class 3 Specification Dimensions Size： Diameter 20-1000 mm Length <4431 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 C, Class 3 Properties -:- For detailed product information, please contact sales. -:

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

Packing of ASTM A533 Low Alloy Steel Flange, Grade C, 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 902 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