Cast Stainless Steel Flange CF8, 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 CF8, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CF8, ASTM A743 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF8, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF8 (ASTM A743)** #### **1. Product Overview** Cast Stainless Steel CF8 under ASTM A743 specification is an austenitic stainless steel casting alloy that serves as the cast equivalent of wrought 304 stainless steel. This chromium-nickel alloy offers an excellent combination of corrosion resistance, mechanical properties, and fabrication characteristics. With its balanced composition, CF8 provides reliable performance in a wide range of corrosive environments and is one of the most widely used stainless steel casting alloys across various industries. **Key Advantages:** - **Excellent Corrosion Resistance:** Good performance in various corrosive environments - **Good Mechanical Properties:** Balanced combination of strength and ductility - **Versatile Application Range:** Suitable for numerous industrial applications - **Good Fabricability:** Excellent casting and welding characteristics - **Cost-Effective Solution:** Economical choice for many corrosive applications --- #### **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 J92600:** 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 balanced to provide optimal corrosion resistance and mechanical properties. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.08 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 2.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 18.0-21.0 | | Nickel (Ni) | 8.0-11.0 | *Note: The composition may include residual elements within specified limits to enhance specific properties.* --- #### **4. Mechanical Properties** Mechanical properties are determined in the heat-treated condition as required by ASTM A743. **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% min - **Reduction of Area:** 50% min **Typical Achievable Properties:** - **Tensile Strength:** 515-620 MPa (75-90 ksi) - **Yield Strength:** 240-310 MPa (35-45 ksi) - **Elongation:** 40-55% - **Hardness:** 140-170 HBW - **Impact Strength:** Good 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 when properly annealed --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature:** 1040-1120°C (1900-2050°F) - **Soak Time:** 1 hour per inch of thickness, minimum 1 hour - **Cooling:** Rapid water quench or rapid air cool - **Objective:** To dissolve carbides and achieve homogeneous austenitic structure **Important Considerations:** - Rapid cooling through 425-815°C (800-1500°F) range is essential - Prevents chromium carbide precipitation at grain boundaries - Ensures optimal corrosion resistance properties --- #### **7. Corrosion Resistance** CF8 offers good corrosion resistance in various environments: - **Atmospheric Conditions:** Excellent resistance to rural, urban, and industrial atmospheres - **Fresh Water:** Very good resistance to potable water and steam - **Chemical Media:** - Good resistance to most organic chemicals - Moderate resistance to inorganic acids - Good oxidizing acid resistance - **Intergranular Corrosion:** Good resistance when properly heat treated - **Pitting and Crevice Corrosion:** Moderate resistance in mild environments --- #### **8. Product Applications** CF8 cast stainless steel is widely used across multiple industries for general corrosive applications: **Chemical Processing Industry:** - Tanks and vessels for mild corrosive service - Piping systems and fittings - Mixing equipment **Food and Beverage Industry:** - Processing equipment and storage tanks - Pasteurizers and heat exchangers - Food handling machinery **Architectural Applications:** - Decorative castings - Structural components - Building fixtures **Marine Applications:** - Pump components - Valve bodies - Marine hardware **Other Applications:** - Water treatment equipment - Pharmaceutical processing components - General industrial equipment --- #### **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 **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 - **Interpass Temperature:** Maintain below 150°C (300°F) - **Filler Metals:** E308 or ER308 - **Post-weld Heat Treatment:** Generally not required for thin sections --- #### **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 - **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. CF8 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, and manufacturing processes. Always consult the complete ASTM A743 standard and qualified materials engineers for critical applications. CF8 is suitable for general corrosive applications but may not be appropriate for severe chloride-containing environments or highly oxidizing conditions where more highly alloyed materials would be required. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF8, ASTM A743 Specification Dimensions Size： Diameter 20-1000 mm Length <4184 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 CF8, ASTM A743 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CF8, ASTM A743 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CF8, ASTM A743 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CF8, 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 655 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