ASTM A543 Steel Flange, Grade C

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 A543 Steel Flange, Grade C Product Information -:- For detailed product information, please contact sales. -: ASTM A543 Steel Flange, Grade C Synonyms -:- For detailed product information, please contact sales. -:

ASTM A543 Steel, Grade C Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A543 Grade C: Nickel-Chromium-Molybdenum Alloy Steel Plate** #### **1. Overview** ASTM A543 Grade C is a **high-nickel chromium-molybdenum alloy steel plate** supplied in the **quenched and tempered condition**. This specification covers steel plates primarily used for **pressure vessel applications** requiring exceptional notch toughness at very low temperatures. With its elevated nickel content compared to Grade B, Grade C provides superior performance in cryogenic service conditions, making it ideal for LNG storage, cryogenic processing, and other extreme low-temperature applications. #### **2. Chemical Composition** The chemical composition features enhanced nickel content for superior low-temperature performance: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.20 max | | Manganese (Mn) | 0.20 - 0.60 | | Phosphorus (P) | 0.025 max | | Sulfur (S) | 0.025 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 3.00 - 4.50 | | Chromium (Cr) | 1.00 - 1.90 | | Molybdenum (Mo) | 0.40 - 0.60 | **Enhanced Composition Features:** - **Elevated Nickel Content (3.00-4.50%)**: Provides exceptional low-temperature toughness down to cryogenic temperatures - **Chromium-Molybdenum System**: Ensures good hardenability and strength properties - **Controlled Carbon Content**: Maintains weldability while achieving required strength levels - **Balanced Alloy Design**: Optimized for heavy-section performance #### **3. Physical & Mechanical Properties** **Mechanical Properties (Quenched & Tempered Condition):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 105 - 135 ksi (725 - 930 MPa) | | **Yield Strength** | 85 ksi min (585 MPa min) | | **Elongation in 2 inches** | 16% min | | **Reduction of Area** | 40% min | | **Charpy V-Notch Impact** | 40 ft-lb min at -150°F (-101°C) | **Exceptional Low-Temperature Performance:** - **Superior Cryogenic Toughness**: Maintains high impact values at extremely low temperatures - **Excellent Fracture Resistance**: Reliable performance in cryogenic service conditions - **Good Hardenability**: Consistent properties in thick sections - **Stable Microstructure**: Predictable behavior under thermal stress **Physical Properties (Typical):** - **Density**: 0.286 lb/in³ (7,920 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**: 25.0 W/m·K at 212°F (100°C) - **Poisson's Ratio**: 0.29 #### **4. Product Applications** Grade C is specified for the most demanding cryogenic and low-temperature applications: **Cryogenic Storage and Processing:** - LNG storage tanks and processing vessels - Liquid nitrogen and oxygen storage systems - Cryogenic research equipment - Superconducting magnet containers **Energy and Power Generation:** - Nuclear power plant components - Cryogenic energy storage systems - Advanced power generation equipment - Specialized energy conversion units **Chemical and Process Industry:** - Low-temperature chemical reactors - Cryogenic process vessels - Petrochemical equipment for low-temperature service - Specialized synthesis units #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 12Ni19 | Similar high-nickel steel grade | | **Europe** | **EN 10028-4** | 12Ni19 | Low temperature nickel steel | | **Japan** | **JIS G3127** | SL3N255 | Low temperature pressure vessel steel | | **Germany** | **DIN 17280** | 12Ni19 | Cryogenic nickel steel equivalent | **Grade Comparison:** | Parameter | Grade B | Grade C | |-----------|---------|---------| | **Nickel Content** | 2.00-3.50% | 3.00-4.50% | | **Impact Test Temperature** | -100°F (-73°C) | -150°F (-101°C) | | **Low-Temperature Capability** | Excellent | Superior | | **Primary Applications** | Low-temperature | Cryogenic | #### **6. Fabrication & Quality Assurance** **Welding and Fabrication Requirements:** - **Pre-heat requirement**: 300-400°F (150-200°C) minimum - **Post-weld heat treatment**: Recommended at 1100-1200°F (595-650°C) - **Welding consumables**: Low-hydrogen nickel-alloy electrodes - **Interpass temperature control**: 400-600°F (200-315°C) maximum - **Procedure qualification**: Essential for all welding operations **Heat Treatment Protocol:** - **Austenitizing temperature**: 1550-1650°F (845-900°C) - **Quenching process**: Accelerated cooling required - **Tempering range**: 1100-1300°F (595-705°C) - **Microstructural requirements**: Fully tempered microstructure **Quality Control and Testing:** - **Impact testing**: Required at -150°F (-101°C) for each heat treatment charge - **Tension tests**: From representative locations of each plate - **Ultrasonic examination**: Available as supplementary requirement - **Hardness verification**: Typically 240-300 HBW --- **Technical Advantages:** - **Exceptional cryogenic toughness** down to -150°F (-101°C) - **High strength-to-weight ratio** - **Good weldability and formability** - **Superior performance** in heavy sections **Design and Application Considerations:** - **ASME Section VIII** design rules applicable - **Cryogenic service** capability to -150°F (-101°C) - **Fracture mechanics analysis** recommended for critical applications - **Advanced NDE** for quality verification **Service Limitations and Guidelines:** - **Minimum design temperature**: -150°F (-101°C) - **Maximum service temperature**: 800°F (425°C) - **Corrosion protection**: May be required in specific environments - **Fabrication control**: Strict procedures essential for cryogenic service **Disclaimer:** This technical information is for reference purposes only. For cryogenic pressure vessel applications, consult the latest ASTM A543 specification and applicable ASME Code requirements. Material selection and fabrication must be approved by qualified engineers and comply with all relevant regulatory standards and quality assurance protocols, particularly for cryogenic service conditions. -:- For detailed product information, please contact sales. -: ASTM A543 Steel, Grade C Specification Dimensions Size： Diameter 20-1000 mm Length <4456 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 A543 Steel, Grade C Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A543 Steel Flange, Grade C -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A543 Steel Flange, Grade C -:- For detailed product information, please contact sales. -:

Packing of ASTM A543 Steel Flange, Grade C -:- 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 927 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