ASTM A533 Low Alloy Steel Flange, Grade C, Class 2

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 2 Product Information -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel Flange, Grade C, Class 2 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A533 Low Alloy Steel, Grade C, Class 2 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A533 Grade C Class 2: High-Nickel Medium-Strength Steel Plate** #### **1. Overview** ASTM A533 Grade C Class 2 is a **high-nickel, medium-strength** quenched and tempered alloy steel plate that combines the exceptional toughness of Grade C chemistry with enhanced strength levels. This class provides an optimal balance for applications requiring both **good strength and superior low-temperature toughness**, particularly in heavy-section nuclear components and cryogenic service vessels where reliability under extreme conditions is critical. #### **2. Chemical Composition** The composition maintains high nickel content with controlled alloying for balanced properties: | 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 | **Optimized Composition Features:** - **Premium Nickel Content (2.75-3.25%)**: Ensures exceptional fracture toughness - **Enhanced Manganese Range**: Provides necessary hardenability for strength development - **Ultra-Low Impurity Control**: Maximum 0.025% P and S for improved weldability and toughness - **Balanced Molybdenum**: Maintains tempering resistance and strength #### **3. Physical & Mechanical Properties** **Mechanical Properties (Up to 2½ inches / 63 mm thickness):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 90 - 110 ksi (620 - 760 MPa) | | **Yield Strength** | 70 ksi min (485 MPa min) | | **Elongation in 2 inches** | 16% min | | **Reduction of Area** | 40% min | | **Charpy V-Notch Impact** | 40 ft-lb min at -75°F (-60°C) | **Thickness Capability and Property Adjustment:** - Maximum thickness: 14 inches (355 mm) - For thickness 2½-4 inches: Yield strength min 65 ksi (450 MPa) - For thickness 4-6 inches: Yield strength min 60 ksi (415 MPa) - Excellent property consistency in heavy sections **Enhanced Physical Properties:** - **Density:** 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Thermal Conductivity:** 31.0 W/m·K at 100°C - **Specific Heat:** 475 J/kg·K at 100°C #### **4. Product Applications** Grade C Class 2 is specified for demanding applications requiring the optimal strength-toughness combination: **Nuclear Power Systems:** - Heavy-wall reactor pressure vessels - Nuclear primary circuit components - Pressurizer shells and steam generators - Advanced reactor core support structures **Cryogenic and Low-Temperature Service:** - LNG storage tank inner shells - Cryogenic process vessels and heat exchangers - Liquid hydrogen storage systems - Low-temperature chemical reactors **High-Pressure Applications:** - Hydrogen compression and storage vessels - High-pressure synthesis reactors - Critical energy storage systems - Advanced power generation equipment #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 12Ni19 | High-nickel equivalent | | **Europe** | **EN 10028-2** | 12Ni19 | Similar strength-toughness balance | | **Japan** | **JIS G3120** | SOV 5B | Premium nuclear quality grade | | **Germany** | **AD 2000** | 12Ni19 | Pressure vessel standard | **Grade C Class Comparison:** | Property | 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 | | **Elongation** | 18% | 16% | 14% | | **Primary Focus** | Maximum Toughness | Balanced Properties | High Strength | #### **6. Fabrication & Quality Assurance** **Precision Welding Requirements:** - **High-nickel welding consumables** mandatory - **Pre-heat control:** 325-425°F (163-218°C) - **Interpass temperature:** 425-575°F (218-302°C) - **Post-weld heat treatment:** 1100-1150°F (595-620°C) - **Welding procedure specifications** requiring full qualification **Controlled Heat Treatment:** - **Austenitizing:** 1600-1650°F (870-900°C) with strict uniformity - **Quenching:** Controlled cooling rate optimization - **Tempering:** 1150-1250°F (620-675°C) with precise temperature control - **Microstructural verification** through metallographic examination **Enhanced Quality Assurance:** - **Ultrasonic examination:** ASTM A578 Level II or higher - **Comprehensive impact testing:** Multiple temperatures and orientations - **Tensile testing:** Longitudinal, transverse, and Z-direction - **Chemical verification:** Complete traceability with spectroscopic analysis --- **Technical Advantages:** - **Optimal strength-toughness balance** for critical applications - **Excellent resistance to neutron irradiation embrittlement** - **Superior performance in cryogenic environments** - **Reliable properties in heavy sections** **Critical Design Considerations:** - **Fracture mechanics evaluation** essential for design - **Radiation embrittlement monitoring** for nuclear service - **Thermal stress analysis** for low-temperature applications - **Fatigue and fracture assessment** for cyclic loading conditions **Nuclear Quality Requirements:** - **Full compliance** with ASME Section III requirements - **Enhanced NDE** including ultrasonic examination - **Radiation surveillance programs** for life extension - **Comprehensive documentation** and traceability **Disclaimer:** This technical information is provided for reference purposes. For nuclear and cryogenic applications, strict adherence to the latest ASTM A533 specification and applicable codes (ASME Section III, Section VIII Division 2) is mandatory. All material selection, fabrication, and testing must be supervised by qualified engineers and comply with relevant regulatory requirements. -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel, Grade C, Class 2 Specification Dimensions Size： Diameter 20-1000 mm Length <4430 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 2 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A533 Low Alloy Steel Flange, Grade C, Class 2 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A533 Low Alloy Steel Flange, Grade C, Class 2 -:- For detailed product information, please contact sales. -:

Packing of ASTM A533 Low Alloy Steel Flange, Grade C, Class 2 -:- 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 901 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