Cast Stainless Steel Flange CPH20, ASTM A451

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. -: Cast Stainless Steel Flange CPH20, ASTM A451 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CPH20, ASTM A451 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CPH20, ASTM A451 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CPH20 (ASTM A451)** #### **1. Product Overview** Cast Stainless Steel CPH20 under ASTM A451 specification is a centrifugally cast austenitic stainless steel pipe specifically designed for high-temperature pressure applications. This heat-resistant alloy offers exceptional performance in elevated temperature service conditions, combining excellent oxidation resistance with good creep strength. The centrifugal casting process provides superior metallurgical structure and mechanical properties, making it particularly suitable for pressure-containing components in high-temperature environments. **Key Advantages:** - **Superior High-Temperature Strength:** Excellent mechanical properties maintained at elevated temperatures - **Enhanced Oxidation Resistance:** Outstanding performance in oxidizing atmospheres up to 1150°C (2100°F) - **Excellent Creep Resistance:** Superior performance under sustained loading at high temperatures - **Homogeneous Structure:** Centrifugal casting ensures consistent properties throughout wall thickness - **Pressure-Containing Capability:** Designed for high-temperature pressure applications --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A451/A451M:** Standard Specification for Centrifugally Cast Austenitic Steel Pipe for High-Temperature Service Additional applicable standards: - **UNS J93045:** Unified Numbering System designation - **ASME SA451:** ASME Boiler and Pressure Vessel Code equivalent - **ASTM A608/A608M:** Specification for Centrifugally Cast Iron-Chromium-Nickel High-Alloy Tubing - **ISO 11972:** Corrosion-resistant cast steels for general applications --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is optimized for high-temperature performance in centrifugally cast products. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.20 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 1.75 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 23.0-27.0 | | Nickel (Ni) | 12.0-15.0 | | Iron (Fe) | Balance | *Note: The composition is balanced to provide optimal high-temperature strength and oxidation resistance for centrifugally cast pipe applications.* --- #### **4. Mechanical Properties** Mechanical properties meet ASTM A451 requirements for centrifugally cast high-temperature pipe. **Minimum Required Values (Solution Annealed Condition):** - **Tensile Strength:** 485 MPa (70 ksi) min - **Yield Strength (0.2% Offset):** 205 MPa (30 ksi) min - **Elongation in 2" (50 mm):** 25.0% min **Elevated Temperature Properties (Typical):** - **At 815°C (1500°F):** Tensile Strength: 110-140 MPa (16-20 ksi) - **At 980°C (1800°F):** Tensile Strength: 70-90 MPa (10-13 ksi) - **Creep Strength:** Excellent long-term performance - **Stress Rupture:** Maintains integrity under sustained loading --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity:** 195 GPa (28,300 ksi) at 21°C - **Poisson's Ratio:** 0.28 - **Thermal Conductivity:** 14.5 W/m·K (at 100°C) - **Specific Heat Capacity:** 500 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 16.0 × 10⁻⁶/°C (20-100°C) - **Electrical Resistivity:** 0.85 μΩ·m - **Magnetic Permeability:** Essentially non-magnetic --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature Range:** 1120-1170°C (2050-2140°F) - **Soak Time:** Appropriate for wall thickness, minimum 1 hour - **Cooling Method:** Rapid cool suitable for pipe configuration - **Objective:** To achieve complete solutionizing and optimal high-temperature properties **Stress Relieving (Optional):** - **Temperature:** 870-925°C (1600-1700°F) - **Purpose:** To relieve residual stresses from casting and fabrication --- #### **7. High-Temperature Performance** CPH20 demonstrates exceptional performance in high-temperature pipe applications: - **Oxidation Resistance:** Excellent scaling resistance up to 1150°C (2100°F) - **Creep Strength:** Superior resistance to deformation under prolonged stress - **Thermal Fatigue:** Excellent performance under thermal cycling conditions - **Carburization Resistance:** Good resistance in carburizing atmospheres - **Structural Stability:** Maintains microstructural integrity during long-term service - **Pressure Containment:** Reliable performance under combined thermal and pressure stresses --- #### **8. Product Applications** CPH20 centrifugally cast stainless steel is extensively used in high-temperature pressure applications: **Power Generation Industry:** - Superheater and reheater tubes - Steam headers and piping - Boiler pressure parts - High-temperature heat exchangers **Petrochemical Industry:** - Reform furnace tubes - Pyrolysis furnace coils - Heater tubes and components - Catalytic reactor tubing **Heat Processing Industry:** - Radiant tubes - Heat treatment furnace components - Annealing furnace parts - Thermal processing equipment **Other Applications:** - Waste heat recovery systems - Incinerator components - High-temperature process piping - Thermal oxidizer systems --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Specifically designed for centrifugal casting process - Excellent fluidity and casting characteristics - Produces dense, homogeneous wall structure - Suitable for various pipe diameters and wall thicknesses **Machining:** - Moderate machinability in annealed condition - Work hardens during machining operations - Use carbide tools with positive rake geometry - Recommended cutting speeds: 15-25 m/min (50-80 SFM) **Welding:** - **Weldability:** Good with proper procedures - **Preheating:** 150-200°C (300-400°F) recommended - **Interpass Temperature:** 200-250°C (400-480°F) - **Filler Metals:** ENiCrFe-3 or equivalent nickel-base alloys - **Post-weld Heat Treatment:** Stress relief annealing recommended --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Per ASTM A751 requirements - **Mechanical Testing:** Tensile tests per ASTM A370 - **Hardness Testing:** Multiple location verification - **Non-Destructive Testing:** - Radiographic examination per ASTM E94 - Liquid penetrant examination per ASTM E165 - Ultrasonic examination for wall thickness verification - **High-Temperature Testing:** - Creep and stress rupture testing - Oxidation resistance evaluation - **Hydrostatic Testing:** Required per specification requirements - **Dimensional Inspection:** Comprehensive dimensional verification - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CPH20 stainless steel under ASTM A451 is specifically designed for centrifugally cast high-temperature pressure applications and requires careful consideration of service conditions. Always consult the complete ASTM A451 standard and work with qualified materials engineers for critical applications. The material's performance may be affected by specific operating conditions, and proper design considerations for thermal expansion, creep, and pressure containment are essential for successful long-term performance in elevated temperature service. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CPH20, ASTM A451 Specification Dimensions Size： Diameter 20-1000 mm Length <4202 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. -: Cast Stainless Steel CPH20, ASTM A451 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CPH20, ASTM A451 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CPH20, ASTM A451 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CPH20, ASTM A451 -:- 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 673 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