Cast Stainless Steel Flange CH20, UNS J93402

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 CH20, UNS J93402 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CH20, UNS J93402 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CH20, UNS J93402 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CH20 (UNS J93402)** #### **1. Product Overview** Cast Stainless Steel CH20 (UNS J93402) is a heat-resistant austenitic stainless steel designed for elevated temperature applications. This chromium-nickel alloy offers excellent oxidation resistance and maintains good mechanical properties at temperatures up to 1150°C (2100°F). The material is particularly suitable for applications involving thermal cycling, corrosive atmospheres, and prolonged exposure to high temperatures, making it a reliable choice for various industrial heating and processing equipment. **Key Advantages:** - **Excellent High-Temperature Strength:** Maintains mechanical integrity under sustained thermal exposure - **Superior Oxidation Resistance:** Outstanding scaling resistance in oxidizing atmospheres - **Good Thermal Fatigue Resistance:** Withstands repeated thermal cycling conditions - **Microstructural Stability:** Resists phase transformation and embrittlement - **Versatile Performance:** Suitable for various high-temperature environments --- #### **2. International Standard** This product conforms to the following international standards: - **UNS J93402:** Unified Numbering System designation - **ASTM A743/A743M:** Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel - **ASTM A297/A297M:** Standard for Heat-Resistant Steel Castings - **ASME SA743:** ASME Boiler and Pressure Vessel Code equivalent - **ISO 11972:** Corrosion-resistant cast steels --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is controlled to ensure optimal high-temperature performance. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.20 max | | Manganese (Mn) | 2.00 max | | Silicon (Si) | 0.75-1.50 | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 22.0-26.0 | | Nickel (Ni) | 12.0-15.0 | | Iron (Fe) | Balance | *Note: The balanced chromium and nickel content provides optimal high-temperature strength and oxidation resistance characteristics.* --- #### **4. Mechanical Properties** Mechanical properties meet standard requirements for high-temperature service. **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 870°C (1600°F):** Tensile Strength: 85-100 MPa (12-14.5 ksi) - **At 980°C (1800°F):** Tensile Strength: 65-80 MPa (9.4-11.6 ksi) - **Creep Strength:** Good performance up to 1150°C (2100°F) - **Stress Rupture:** Maintains integrity under sustained loading --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.90 g/cm³ (0.285 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:** 1-2 hours per inch of thickness - **Cooling Method:** Rapid water quench or air cool - **Objective:** To achieve homogeneous austenitic structure **Stress Relieving (Optional):** - **Temperature:** 870-925°C (1600-1700°F) - **Purpose:** To relieve residual stresses --- #### **7. High-Temperature Performance** UNS J93402 offers reliable performance in high-temperature applications: - **Oxidation Resistance:** Excellent scaling resistance up to 1150°C (2100°F) - **Creep Strength:** Good resistance to deformation under prolonged stress - **Thermal Fatigue:** Excellent performance under thermal cycling - **Carburization Resistance:** Adequate performance in carburizing atmospheres - **Structural Stability:** Resists embrittlement phases formation --- #### **8. Product Applications** UNS J93402 cast stainless steel is used in various high-temperature applications: **Heat Treatment Industry:** - Furnace components - Heat treatment fixtures - Annealing equipment - Carburizing containers **Petrochemical Industry:** - Process heater parts - Reform furnace components - High-temperature piping - Reactor internals **Power Generation:** - Boiler components - Heat exchanger parts - High-temperature ducting - Burner components **Other Applications:** - Ceramic kiln furniture - Glass manufacturing equipment - Incinerator parts - Thermal processing fixtures --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 25-30 mm/m - Requires adequate feeding for sound castings - Suitable for complex components **Machining:** - Moderate machinability in annealed condition - Work hardens during machining - Use carbide tools with positive rake angles - 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 alloys - **Post-weld Heat Treatment:** Stress relief recommended --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Complete composition verification - **Mechanical Testing:** Tensile and hardness testing - **Non-Destructive Testing:** - Radiographic examination - Liquid penetrant testing - **High-Temperature Testing:** - Oxidation resistance testing - Creep testing available - **Certification:** Full material traceability with test reports --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. UNS J93402 (CH20) stainless steel is designed for high-temperature applications and requires careful consideration of service conditions. Performance characteristics may vary based on specific manufacturing processes, heat treatment parameters, and service conditions. Always consult relevant standards and work with qualified materials engineers for critical applications. Proper design considerations for thermal expansion, creep behavior, and atmospheric compatibility are essential for successful performance. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CH20, UNS J93402 Specification Dimensions Size： Diameter 20-1000 mm Length <4205 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 CH20, UNS J93402 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CH20, UNS J93402 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CH20, UNS J93402 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CH20, UNS J93402 -:- 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 676 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