Cast Stainless Steel Flange CD4MCu, ASTM A351

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 CD4MCu, ASTM A351 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CD4MCu, ASTM A351 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CD4MCu, ASTM A351 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CD4MCu, ASTM A351** #### **1. Product Overview** Cast Stainless Steel CD4MCu under ASTM A351 specification is a duplex (austenitic-ferritic) stainless steel that combines high strength with excellent resistance to stress corrosion cracking and erosion-corrosion. This chromium-nickel-molybdenum-copper alloy offers an optimal balance of mechanical properties and corrosion resistance, making it particularly suitable for demanding applications in corrosive environments, especially those containing chlorides. **Key Advantages:** - **Excellent Corrosion Resistance:** Superior performance in chloride-containing environments - **High Mechanical Strength:** Approximately twice the yield strength of standard austenitic stainless steels - **Good Resistance to Stress Corrosion Cracking:** Excellent performance in environments susceptible to SCC - **Excellent Erosion-Corrosion Resistance:** Ideal for applications involving high-velocity fluids - **Good Wear Resistance:** Suitable for abrasive service conditions --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A351/A351M:** Standard Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts Additional applicable standards: - **UNS J93370:** Unified Numbering System designation - **ASME SA351:** ASME Boiler and Pressure Vessel Code equivalent - **ISO 11972:** Corrosion-resistant cast steels for general applications --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is carefully balanced to maintain the optimal austenitic-ferritic microstructure. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.04 max | | Manganese (Mn) | 1.00 max | | Silicon (Si) | 1.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 24.5-26.5 | | Nickel (Ni) | 4.75-6.00 | | Molybdenum (Mo) | 1.75-2.25 | | Copper (Cu) | 2.75-3.25 | | Nitrogen (N) | 0.10-0.25 | *Note: The balanced composition ensures approximately 50/50 austenite-ferrite microstructure.* --- #### **4. Mechanical Properties** Mechanical properties are determined in the heat-treated condition as required by ASTM A351. **Minimum Required Values (Heat-Treated Condition):** - **Tensile Strength:** 690 MPa (100 ksi) min - **Yield Strength (0.2% Offset):** 485 MPa (70 ksi) min - **Elongation in 2" (50 mm):** 20% min - **Reduction of Area:** 35% min - **Hardness:** 290 HBW max **Typical Achievable Properties:** - **Tensile Strength:** 760-895 MPa (110-130 ksi) - **Yield Strength:** 550-690 MPa (80-100 ksi) - **Elongation:** 25-30% - **Impact Energy:** 100 J (74 ft-lb) min at room temperature --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.80 g/cm³ (0.282 lb/in³) - **Modulus of Elasticity:** 186 GPa (27,000 ksi) - **Poisson's Ratio:** 0.27-0.30 - **Thermal Conductivity:** 15.0 W/m·K (at 100°C) - **Specific Heat Capacity:** 500 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 13.0 × 10⁻⁶/°C (20-100°C) - **Magnetic Permeability:** Slightly magnetic due to ferritic phase --- #### **6. Heat Treatment** **Standard Heat Treatment:** **Solution Annealing:** - Temperature: 1120-1170°C (2050-2140°F) - Soak time: 1-2 hours per inch of thickness - Cooling: Rapid water quench to preserve duplex structure - Objective: To achieve approximately 50% austenite and 50% ferrite **Important Note:** - Avoid temperatures between 300-1000°C (570-1830°F) to prevent embrittlement - Do not stress relieve at temperatures above 300°C (570°F) --- #### **7. Corrosion Resistance** - **Chloride Stress Corrosion Cracking:** Excellent resistance, superior to 300-series austenitic stainless steels - **Pitting and Crevice Corrosion:** Very good resistance due to high chromium, molybdenum, and nitrogen content - **General Corrosion:** Excellent resistance to various acids, including sulfuric and phosphoric acids - **Erosion-Corrosion:** Outstanding performance in high-velocity fluid applications - **Intergranular Corrosion:** Good resistance when properly heat treated --- #### **8. Product Applications** CD4MCu cast stainless steel is widely used in aggressive environments across various industries. **Primary Applications Include:** - **Chemical Processing Equipment:** Reactors, columns, and heat exchangers - **Oil and Gas Industry:** Christmas tree components, valves, and fittings - **Pump Components:** Casings, impellers, and diffusers for corrosive services - **Marine Applications:** Propeller hubs, seawater system components - **Pollution Control Equipment:** Scrubbers, absorbers, and environmental systems - **Pulp and Paper Industry:** Digester and bleaching equipment - **Power Generation:** FGD system components and cooling water systems --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-25 mm/m - Requires careful solidification control - Suitable for complex geometries and heavy sections **Machining:** - More difficult to machine than austenitic stainless steels - Use rigid setups and positive rake tools - Recommended cutting speeds: 15-25 m/min (50-80 SFM) - Adequate cooling essential **Welding:** - **Weldability:** Fair to good with proper procedures - Preheating: Generally not required - Interpass temperature: Max 150°C (300°F) - Filler metals: Over-alloyed duplex or nickel-base electrodes - Post-weld heat treatment: Generally not recommended --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Per ASTM A751 requirements - **Mechanical Testing:** Tensile tests per ASTM A370 from cast-on coupons - **Hardness Testing:** Multiple location verification - **Non-Destructive Testing:** - Radiographic examination per ASTM E94 - Liquid penetrant examination per ASTM E165 - Magnetic particle examination per ASTM E709 - **Corrosion Testing:** Optional per customer requirements - **Ferrite Content:** Typically 35-55% measured per ASTM A800 - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CD4MCu under ASTM A351 requires strict control of chemical composition and heat treatment to maintain the proper duplex microstructure. The material's performance may vary based on specific service conditions, casting design, and manufacturing processes. Always consult the complete ASTM A351 standard and work with qualified materials engineers for critical applications. Proper quality control and adherence to specified heat treatment procedures are essential for achieving optimal corrosion resistance and mechanical properties in duplex stainless steel castings. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CD4MCu, ASTM A351 Specification Dimensions Size： Diameter 20-1000 mm Length <4175 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 CD4MCu, ASTM A351 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CD4MCu, ASTM A351 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CD4MCu, ASTM A351 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CD4MCu, ASTM A351 -:- 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 646 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