Cast Stainless Steel Flange CK20, ACI

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 CK20, ACI Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CK20, ACI Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CK20, ACI Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CK20 (ACI)** #### **1. Product Overview** Cast Stainless Steel CK20 under ACI (Alloy Casting Institute) specification is a premium heat-resistant austenitic stainless steel designed for the most severe high-temperature service conditions. This high-performance alloy belongs to the HP series (25Cr-35Ni-Nb) and offers exceptional resistance to oxidation, carburization, and thermal cycling at temperatures up to 1200°C (2190°F). The material demonstrates outstanding creep rupture strength and microstructural stability, making it ideal for critical components in high-temperature processing industries. **Key Advantages:** - **Exceptional High-Temperature Strength:** Superior mechanical properties maintained under extreme thermal conditions - **Outstanding Creep Resistance:** Excellent performance under sustained loading at elevated temperatures - **Superior Oxidation Resistance:** Outstanding scaling resistance in aggressive atmospheres - **Enhanced Microstructural Stability:** Niobium stabilization prevents sensitization and embrittlement - **Excellent Carburization Resistance:** Superior performance in carburizing environments --- #### **2. International Standard** This product conforms to the following international standards: - **ACI Standard:** Alloy Casting Institute specification for HP-type modified heat-resistant alloys - **ASTM A297/A297M:** Standard Specification for Steel Castings, Iron-Chromium, Iron-Chromium-Nickel, Heat-Resistant - **UNS J94204:** Unified Numbering System designation - **ASME SA297:** ASME Boiler and Pressure Vessel Code equivalent - **ISO 11972:** Corrosion-resistant cast steels for general applications --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition features niobium stabilization for enhanced high-temperature performance. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.35-0.45 | | Manganese (Mn) | 2.00 max | | Silicon (Si) | 1.00-2.00 | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 24.0-28.0 | | Nickel (Ni) | 33.0-37.0 | | Niobium (Nb) | 0.80-1.20 | | Iron (Fe) | Balance | *Note: The high nickel and chromium content combined with niobium stabilization provides exceptional high-temperature strength and microstructural stability for severe service conditions.* --- #### **4. Mechanical Properties** Mechanical properties are guaranteed in the heat-treated condition. **Minimum Required Values (Solution Annealed Condition):** - **Tensile Strength:** 485 MPa (70 ksi) min - **Yield Strength (0.2% Offset):** 240 MPa (35 ksi) min - **Elongation in 2" (50 mm):** 8.0% min **Elevated Temperature Properties (Typical):** - **At 870°C (1600°F):** Tensile Strength: 150-180 MPa (22-26 ksi) - **At 980°C (1800°F):** Tensile Strength: 90-120 MPa (13-17 ksi) - **Creep Strength:** Exceptional performance up to 1150°C (2100°F) - **Stress Rupture:** Superior resistance under sustained loading --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.95 g/cm³ (0.287 lb/in³) - **Modulus of Elasticity:** 200 GPa (29,000 ksi) at 21°C - **Poisson's Ratio:** 0.29 - **Thermal Conductivity:** 14.0 W/m·K (at 100°C) - **Specific Heat Capacity:** 520 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 15.5 × 10⁻⁶/°C (20-100°C) - **Electrical Resistivity:** 0.95 μΩ·m - **Magnetic Permeability:** Essentially non-magnetic --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature Range:** 1175-1225°C (2150-2235°F) - **Soak Time:** 2-4 hours depending on section size - **Cooling Method:** Rapid water quench - **Objective:** To achieve complete solutionizing and carbide dissolution **Stabilization Treatment:** - **Temperature:** 900-950°C (1650-1740°F) - **Soak Time:** 4-8 hours - **Purpose:** To precipitate secondary carbides for enhanced stability --- #### **7. High-Temperature Performance** CK20 demonstrates exceptional performance in severe high-temperature environments: - **Oxidation Resistance:** Outstanding scaling resistance up to 1200°C (2190°F) - **Carburization Resistance:** Excellent performance in carburizing atmospheres - **Sulfidation Resistance:** Good resistance to sulfur-containing environments - **Thermal Fatigue:** Exceptional resistance to thermal cycling and shock - **Creep Rupture:** Superior long-term performance under stress - **Microstructural Stability:** Excellent resistance to sigma phase formation --- #### **8. Product Applications** CK20 cast stainless steel is extensively used in the most demanding high-temperature applications: **Ethylene and Petrochemical Industry:** - Pyrolysis furnace tubes and fittings - Transfer line exchangers - Cracking furnace components - Quench boiler tubes **Heat Treatment Industry:** - Radiant tubes and retorts - Furnace rolls and rollers - Heat treatment fixtures - Carburizing and annealing equipment **Power Generation:** - Superheater and reheater components - Boiler hangers and supports - High-temperature headers - Waste heat recovery systems **Other Applications:** - Ceramic kiln furniture - Glass tank components - Incinerator parts - Reform furnace tubes --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry techniques - Pattern shrinkage: 20-25 mm/m - Requires careful gating and risering - Suitable for complex high-temperature components **Machining:** - Moderate machinability in annealed condition - Work hardens during machining operations - Use carbide tools with positive rake geometry - Recommended cutting speeds: 10-20 m/min (35-65 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:** ENiCrCoMo-1 or equivalent high-temperature alloys - **Post-weld Heat Treatment:** Full solution annealing recommended --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Complete chemical composition verification - **Mechanical Testing:** Comprehensive mechanical property testing - **High-Temperature Testing:** - Creep and stress rupture testing - Oxidation resistance testing per ASTM G54 - Cyclic oxidation testing - **Non-Destructive Testing:** - Radiographic examination - Liquid penetrant testing - Dimensional verification - **Metallurgical Analysis:** - Microstructure evaluation - Carbide morphology analysis - **Certification:** Full material traceability with comprehensive test reports --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CK20 stainless steel under ACI specification is specifically designed for severe high-temperature applications and requires careful consideration of service conditions. The information contained herein is based on typical industry data and should be verified for specific applications. Always consult relevant standards and work with qualified materials engineers for critical high-temperature applications. Performance characteristics may vary based on specific manufacturing processes, heat treatment parameters, and service conditions. Proper design considerations for thermal expansion, creep behavior, and atmospheric compatibility are essential for successful long-term performance in demanding high-temperature service environments. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CK20, ACI Specification Dimensions Size： Diameter 20-1000 mm Length <4209 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 CK20, ACI Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CK20, ACI -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CK20, ACI -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CK20, ACI -:- 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 680 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