Cast Stainless Steel Flange CF3, 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 CF3, ASTM A744 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CF3, ASTM A744 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF3, ASTM A744 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CF3, ASTM A744** #### **1. Product Overview** Cast Stainless Steel CF3 under ASTM A744 specification is an austenitic stainless steel casting alloy specifically designed for severe corrosive service conditions. As the cast equivalent of wrought 304L stainless steel, this low-carbon chromium-nickel alloy provides excellent corrosion resistance combined with good mechanical properties and outstanding weldability. The "CF3" designation indicates its low carbon content (0.03% maximum), which significantly reduces susceptibility to intergranular corrosion in welded components and heat-affected zones. **Key Advantages:** - **Exceptional Corrosion Resistance:** Superior performance in severe corrosive environments - **Low Carbon Content:** Maximum resistance to intergranular corrosion and carbide precipitation - **Excellent Weldability:** Can be welded without post-weld heat treatment requirements - **Good Mechanical Properties:** Balanced combination of strength, ductility, and toughness - **Severe Service Capability:** Meets stringent requirements for demanding applications --- #### **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 J92500:** 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) | 0.03 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 2.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 17.0-21.0 | | Nickel (Ni) | 8.0-12.0 | | Iron (Fe) | Balance | *Note: The low carbon content is critical for preventing chromium carbide precipitation in severe service environments.* --- #### **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):** 35.0% min - **Reduction of Area:** 50.0% min **Typical Achievable Properties:** - **Tensile Strength:** 515-620 MPa (75-90 ksi) - **Yield Strength:** 240-310 MPa (35-45 ksi) - **Elongation:** 40-55% - **Hardness:** 140-160 HBW - **Impact Strength:** Excellent at cryogenic temperatures --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.90 g/cm³ (0.285 lb/in³) - **Modulus of Elasticity:** 193 GPa (28,000 ksi) - **Poisson's Ratio:** 0.28 - **Thermal Conductivity:** 16.2 W/m·K (at 100°C) - **Specific Heat Capacity:** 500 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 16.5 × 10⁻⁶/°C (20-100°C) - **Electrical Resistivity:** 0.72 μΩ·m - **Magnetic Permeability:** Essentially non-magnetic (μ ≈ 1.02) --- #### **6. Heat Treatment** **Solution Annealing Treatment (Mandatory):** - **Temperature Range:** 1040-1120°C (1900-2050°F) - **Soak Time:** 1 hour per inch of thickness, minimum 1 hour - **Cooling Method:** Rapid water quench or rapid air cool - **Microstructure:** Homogeneous austenitic structure **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 --- #### **7. Corrosion Resistance** CF3 offers exceptional corrosion resistance for severe service applications: - **General Corrosion:** Excellent resistance to a wide range of corrosive media - **Intergranular Corrosion:** Superior resistance due to low carbon content - **Stress Corrosion Cracking:** Good resistance in chloride environments - **Pitting and Crevice Corrosion:** Moderate resistance in chloride-containing solutions - **Oxidizing Environments:** Excellent resistance to nitric acid and other oxidizers - **Organic Acids:** Very good resistance to acetic, citric, and tartaric acids --- #### **8. Product Applications** CF3 under ASTM A744 is specified for severe service applications across multiple industries: **Primary Applications Include:** - **Chemical Processing Industry:** Reactors, columns, and heat exchangers handling corrosive chemicals - **Oil and Gas:** Downhole tools, valve bodies, and piping systems for corrosive service - **Pharmaceutical Industry:** Bioreactors, fermentation tanks, and high-purity fluid systems - **Food Processing:** Equipment for acidic food products and cleaning solutions - **Pulp and Paper:** Bleaching equipment and chemical recovery systems - **Pollution Control:** Scrubbers, waste treatment equipment, and emission control systems - **Marine Applications:** Seawater handling systems and offshore platform components --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Excellent castability with good fluidity and mold filling - 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 - requires positive rake tools and rigid setups - Recommended cutting speeds: 20-35 m/min (65-115 SFM) - Use sharp tools and adequate cooling **Welding:** - **Weldability:** Excellent - Preheating: Not required - Interpass Temperature: Maintain below 150°C (300°F) - Filler Metals: E308L or ER308L - 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 - Ultrasonic testing available as supplementary requirement - **Corrosion Testing:** Optional per customer requirements - **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. CF3 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. Proper quality control and adherence to specified heat treatment procedures are essential for ensuring optimal performance in severe service environments. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF3, ASTM A744 Specification Dimensions Size： Diameter 20-1000 mm Length <4179 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 CF3, ASTM A744 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CF3, ASTM A744 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CF3, ASTM A744 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CF3, 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 650 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