Cast Stainless Steel Flange CF3MN, ASTM A743

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 CF3MN, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CF3MN, ASTM A743 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF3MN, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF3MN (ASTM A743)** #### **1. Product Overview** Cast Stainless Steel CF3MN under ASTM A743 specification is an austenitic stainless steel casting alloy that represents the cast equivalent of wrought 316LN stainless steel. This low-carbon chromium-nickel-molybdenum alloy with controlled nitrogen content offers enhanced strength and superior corrosion resistance compared to standard CF3M alloy. The "MN" designation indicates the presence of both Molybdenum and Nitrogen, which work synergistically to significantly improve pitting resistance and mechanical strength while maintaining excellent corrosion resistance in various aggressive environments. **Key Advantages:** - **Enhanced Mechanical Strength:** Nitrogen strengthening provides improved yield and tensile strength - **Superior Pitting Resistance:** Combined effect of molybdenum and nitrogen enhances pitting corrosion resistance - **Excellent General Corrosion Resistance:** Suitable for a wide range of corrosive media - **Good Weldability:** Low carbon content prevents sensitization during welding - **Cryogenic Toughness:** Maintains excellent impact properties at low temperatures --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A743/A743M:** Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, and Nickel-Base Corrosion-Resistant Alloys for General Application Additional applicable standards: - **UNS J92800:** Unified Numbering System designation - **ASME SA743:** ASME Boiler and Pressure Vessel Code equivalent - **ISO 11972:** Corrosion-resistant cast steels for general applications - **EN 10283:** Corrosion resistant steel castings --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is precisely controlled to optimize both corrosion resistance and mechanical properties. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.03 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 1.50 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 17.0-21.0 | | Nickel (Ni) | 9.0-13.0 | | Molybdenum (Mo) | 2.0-3.0 | | Nitrogen (N) | 0.10-0.20 | *Note: The nitrogen content is carefully controlled to enhance strength and pitting corrosion resistance without compromising corrosion performance.* --- #### **4. Mechanical Properties** Mechanical properties are determined in the solution-annealed condition as required by ASTM A743. **Minimum Required Values:** - **Tensile Strength:** 485 MPa (70 ksi) min - **Yield Strength (0.2% Offset):** 205 MPa (30 ksi) min - **Elongation in 2" (50 mm):** 30% min - **Reduction of Area:** 40% min **Typical Achievable Properties:** - **Tensile Strength:** 515-655 MPa (75-95 ksi) - **Yield Strength:** 240-345 MPa (35-50 ksi) - **Elongation:** 35-50% - **Hardness:** 150-180 HBW - **Impact Strength:** Excellent at cryogenic temperatures down to -196°C (-321°F) --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.98 g/cm³ (0.288 lb/in³) - **Modulus of Elasticity:** 193 GPa (28,000 ksi) - **Poisson's Ratio:** 0.28 - **Thermal Conductivity:** 16.3 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:** 0.74 μΩ·m - **Magnetic Permeability:** Essentially non-magnetic --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature Range:** 1040-1150°C (1900-2100°F) - **Soak Time:** 1 hour per inch of thickness, minimum 1 hour - **Cooling Method:** Rapid water quench or rapid air cool - **Objective:** To dissolve carbides and achieve homogeneous austenitic structure **Critical Processing Considerations:** - Rapid cooling through 425-815°C (800-1500°F) range is essential - Prevents chromium carbide precipitation at grain boundaries - Ensures optimal corrosion resistance and mechanical properties --- #### **7. Corrosion Resistance** CF3MN offers enhanced corrosion resistance in various demanding environments: - **Pitting Corrosion:** Excellent resistance due to combined effect of molybdenum and nitrogen - **Crevice Corrosion:** Superior performance in stagnant conditions - **General Corrosion:** Excellent resistance to a wide range of corrosive media - **Intergranular Corrosion:** Maximum resistance due to low carbon content - **Chloride Environments:** Good resistance to chloride-induced corrosion - **Acid Resistance:** Good performance in sulfuric, phosphoric, and organic acids - **Pitting Resistance Equivalent Number (PREN):** ~26-30 --- #### **8. Product Applications** CF3MN cast stainless steel is widely used in applications requiring enhanced corrosion resistance and mechanical strength: **Chemical Processing Industry:** - Reactors and pressure vessels for corrosive service - Heat exchangers and condensers - Piping systems and valves handling aggressive chemicals **Marine and Offshore Applications:** - Seawater handling systems - Pump components and valve bodies - Marine hardware and fittings **Oil and Gas Industry:** - Process equipment in corrosive environments - Valve components and fittings - Pipeline components **Pharmaceutical and Food Processing:** - Bioreactors and fermentation tanks - Processing equipment for corrosive media - High-purity fluid handling systems **Other Applications:** - Pulp and paper processing equipment - Water treatment components - Pollution control equipment --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-25 mm/m - Low hot tearing tendency - Suitable for complex geometries and thin sections **Machining:** - Good machinability in solution annealed condition - Work hardens rapidly during machining - Use positive rake tools and rigid setups - Recommended cutting speeds: 20-35 m/min (65-115 SFM) - Adequate cooling and lubrication recommended **Welding:** - **Weldability:** Excellent - **Preheating:** Not required - **Interpass Temperature:** Maintain below 150°C (300°F) - **Filler Metals:** E316L or ER316L - **Post-weld Heat Treatment:** Generally not required --- #### **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 - Magnetic particle examination (where applicable) - **Corrosion Testing:** Optional per customer requirements - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CF3MN stainless steel under ASTM A743 requires proper heat treatment to achieve optimal properties. The material's performance may vary based on specific service conditions, casting design, heat treatment parameters, and manufacturing processes. Always consult the complete ASTM A743 standard and work with qualified materials engineers for critical applications. Proper material selection should be based on comprehensive evaluation of the specific service environment and requirements. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF3MN, ASTM A743 Specification Dimensions Size： Diameter 20-1000 mm Length <4183 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 CF3MN, ASTM A743 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CF3MN, ASTM A743 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CF3MN, ASTM A743 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CF3MN, ASTM A743 -:- 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 654 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