Cast Stainless Steel Flange CF3, 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 CF3, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CF3, ASTM A743 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF3, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CF3, ASTM A743** #### **1. Product Overview** Cast Stainless Steel CF3 under ASTM A743 specification is an austenitic stainless steel that represents the cast equivalent of wrought grade 304L stainless steel. This low-carbon chromium-nickel alloy offers excellent corrosion resistance, good mechanical properties, and superior weldability. The low carbon content (0.03% max) minimizes carbide precipitation during welding and heat treatment, making it particularly suitable for applications where intergranular corrosion must be avoided. **Key Advantages:** - **Excellent Corrosion Resistance:** Superior performance in various corrosive environments - **Low Carbon Content:** Minimizes carbide precipitation and susceptibility to intergranular corrosion - **Good Mechanical Properties:** Balanced combination of strength and ductility - **Excellent Weldability:** Can be welded without post-weld heat treatment - **Good Fabricability:** Easy to cast, machine, and form --- #### **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 J92500:** 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 controlled to ensure optimal corrosion resistance and mechanical properties. | 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 | *Note: The composition may include residual elements within specified limits.* --- #### **4. Mechanical Properties** Mechanical properties are determined in the heat-treated condition as required by ASTM A743. **Minimum Required Values (Heat-Treated Condition):** - **Tensile Strength:** 485 MPa (70 ksi) min - **Yield Strength (0.2% Offset):** 205 MPa (30 ksi) min - **Elongation in 2" (50 mm):** 35% min - **Reduction of Area:** 50% min **Typical Achievable Properties:** - **Tensile Strength:** 515-655 MPa (75-95 ksi) - **Yield Strength:** 240-345 MPa (35-50 ksi) - **Elongation:** 40-55% - **Hardness:** 140-170 HBW --- #### **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:** 0.27-0.30 - **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) - **Magnetic Permeability:** Essentially non-magnetic when annealed --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature:** 1040-1120°C (1900-2050°F) - **Soak Time:** 1 hour per inch of thickness, minimum 30 minutes - **Cooling:** Rapid water quench or rapid air cool - **Objective:** To dissolve carbides and achieve homogeneous austenitic structure **Important Notes:** - Rapid cooling through the 425-815°C (800-1500°F) range is essential - Prevents chromium carbide precipitation at grain boundaries - No precipitation hardening response --- #### **7. Corrosion Resistance** CF3 offers excellent corrosion resistance in various environments: - **Atmospheric Corrosion:** Excellent resistance to rural, urban, and industrial atmospheres - **Fresh Water:** Very good resistance to potable water and steam - **Chemical Media:** - Excellent resistance to most organic chemicals - Good resistance to many inorganic chemicals - Good oxidizing acid resistance - **Intergranular Corrosion:** Excellent resistance due to low carbon content - **Pitting and Crevice Corrosion:** Moderate resistance in chloride environments --- #### **8. Product Applications** CF3 cast stainless steel is widely used in various industries requiring good corrosion resistance: **Primary Applications Include:** - **Chemical Processing Equipment:** Tanks, reactors, and mixing vessels - **Food and Beverage Industry:** Processing equipment, storage tanks, and piping - **Pharmaceutical Industry:** Process vessels and fluid handling systems - **Pulp and Paper Industry:** Bleaching equipment and chemical recovery systems - **Water Treatment:** Filtration systems and water handling components - **Architectural Applications:** Decorative castings and structural components - **Marine Applications:** Pump components and seawater handling systems --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Excellent castability with good fluidity - Pattern shrinkage: 20-25 mm/m - Low hot tearing tendency - Suitable for complex geometries and thin sections **Machining:** - Good machinability in annealed condition - Work hardens rapidly during machining - Use positive rake tools and rigid setups - Recommended cutting speeds: 20-35 m/min (65-115 SFM) **Welding:** - **Weldability:** Excellent - Preheating: Generally not required - Post-weld heat treatment: Not required - Filler metals: E308L or similar low-carbon grades - Maintain low interpass temperatures --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Per ASTM A751 requirements - **Mechanical Testing:** Tensile tests per ASTM A370 - **Hardness Testing:** Brinell or Rockwell methods - **Non-Destructive Testing:** - Radiographic examination per ASTM E94 - Liquid penetrant examination per ASTM E165 - Magnetic particle examination per ASTM E709 (limited applicability) - **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. CF3 stainless steel is designed for general corrosion-resistant applications and requires proper heat treatment to achieve optimal properties. The material's performance may vary based on specific service conditions, casting design, and manufacturing processes. Always consult the complete ASTM A743 standard and qualified materials engineers for critical applications. CF3 is not recommended for severe chloride-containing environments or elevated temperature applications where sensitization may occur. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF3, ASTM A743 Specification Dimensions Size： Diameter 20-1000 mm Length <4178 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 A743 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CF3, ASTM A743 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CF3, ASTM A743 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CF3, 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 649 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