Cast Stainless Steel Flange CF8M, ASTM A744

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 CF8M, ASTM A744 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CF8M, ASTM A744 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF8M, ASTM A744 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF8M (ASTM A744)** #### **1. Product Overview** Cast Stainless Steel CF8M under ASTM A744 specification is an austenitic stainless steel casting alloy specifically designed for severe corrosive service conditions. As the cast equivalent of wrought 316 stainless steel, this chromium-nickel-molybdenum alloy offers superior corrosion resistance, particularly in chloride-containing environments. The "M" designation indicates the presence of 2-3% molybdenum, which significantly enhances pitting and crevice corrosion resistance, making it an optimal choice for demanding applications where conventional stainless steels may fail. **Key Advantages:** - **Exceptional Corrosion Resistance:** Superior performance in severe corrosive environments, including chloride-containing media - **Enhanced Pitting Resistance:** Molybdenum addition significantly improves resistance to pitting corrosion - **Excellent Crevice Corrosion Resistance:** Superior performance in stagnant and crevice conditions - **Severe Service Capability:** Meets stringent requirements for demanding applications - **Good Mechanical Properties:** Balanced combination of strength, ductility, and toughness --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A744/A744M:** Standard Specification for Castings, Iron-Chromium-Nickel, Iron-Chromium-Nickel-Molybdenum, Corrosion Resistant, for Severe Service Additional applicable standards: - **UNS J92900:** Unified Numbering System designation - **ASME SA744:** 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 ensure optimal performance in severe service conditions. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.08 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 1.50 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 18.0-21.0 | | Nickel (Ni) | 9.0-12.0 | | Molybdenum (Mo) | 2.0-3.0 | | Iron (Fe) | Balance | *Note: The molybdenum content is critical for enhanced pitting and crevice corrosion resistance in chloride environments encountered in severe service applications.* --- #### **4. Mechanical Properties** Mechanical properties meet the stringent requirements of ASTM A744 for severe service applications. **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):** 30.0% min - **Reduction of Area:** 40.0% 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 (Mandatory):** - **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 achieve homogeneous austenitic structure and optimal corrosion resistance for severe service **Critical Processing Requirements:** - Rapid cooling through 425-815°C (800-1500°F) range is essential - Prevents chromium carbide precipitation at grain boundaries - Ensures maximum corrosion resistance for severe service conditions --- #### **7. Corrosion Resistance** CF8M offers exceptional corrosion resistance for severe service applications: - **Pitting Corrosion:** Excellent resistance due to molybdenum content (PREN ~24-26) - **Crevice Corrosion:** Superior performance in stagnant and crevice conditions - **Chloride Stress Corrosion Cracking:** Good resistance in moderate chloride environments - **General Corrosion:** Excellent resistance to a wide range of corrosive media - **Intergranular Corrosion:** Good resistance when properly heat treated - **Acid Resistance:** Good performance in sulfuric, phosphoric, and organic acids --- #### **8. Product Applications** CF8M under ASTM A744 is specified for severe service applications across multiple industries: **Chemical Processing Industry:** - Reactors and pressure vessels for corrosive chemical service - Heat exchangers and condensers in chloride environments - Process piping systems handling aggressive chemicals **Oil and Gas Industry:** - Wellhead components and Christmas tree parts - Valve bodies and fittings for corrosive service - Process equipment in offshore and onshore facilities **Marine and Offshore Applications:** - Seawater handling systems and components - Pump casings and impellers for marine service - Offshore platform equipment and components **Power Generation:** - FGD system components - Cooling water system parts - Pump components for utility service **Other Severe Service Applications:** - Pharmaceutical processing equipment - Pollution control equipment - Water treatment system components --- #### **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 severe service components **Machining:** - Good machinability in solution annealed condition - Work hardens rapidly during machining operations - Use positive rake tools and rigid setups - Recommended cutting speeds: 20-35 m/min (65-115 SFM) **Welding:** - **Weldability:** Excellent - **Preheating:** Generally 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:** Comprehensive analysis per ASTM A751 - **Mechanical Testing:** Full suite of tests per ASTM A370 - **Hardness Testing:** Multiple location verification - **Non-Destructive Examination:** - Radiographic testing per ASTM E94/E1032 - Liquid penetrant testing per ASTM E165/E1417 - Additional NDT as required by specification - **Corrosion Testing:** Optional per customer requirements for severe service verification - **Certification:** Full traceability with comprehensive test reports - **Heat Treatment Documentation:** Complete thermal cycle records --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CF8M stainless steel under ASTM A744 is designed for severe service applications and requires strict adherence to specified chemical composition, heat treatment, and quality assurance procedures. The material's performance may vary based on specific service conditions, casting design, and manufacturing processes. Always consult the complete ASTM A744 standard and work with qualified materials engineers for critical applications in severe service environments. Proper material selection, design, fabrication, and quality control are essential for ensuring reliable performance in demanding corrosive applications. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF8M, ASTM A744 Specification Dimensions Size： Diameter 20-1000 mm Length <4191 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 CF8M, ASTM A744 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CF8M, ASTM A744 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CF8M, ASTM A744 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CF8M, ASTM A744 -:- 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 662 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