Cast Stainless Steel Flange CF16Fa, 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 CF16Fa, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CF16Fa, ASTM A743 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF16Fa, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF16Fa (ASTM A743)** #### **1. Product Overview** Cast Stainless Steel CF16Fa under ASTM A743 specification is an advanced free-machining austenitic stainless steel with enhanced selenium modification for superior machining performance. This specialized grade represents an improved version of standard CF16F, offering exceptional chip-breaking characteristics and extended tool life while maintaining adequate corrosion resistance for general applications. The "F" designation indicates free-machining characteristics, while the "a" suffix denotes the selenium-modified variant with optimized performance attributes. **Key Advantages:** - **Superior Machinability:** Excellent chip formation and improved surface finish - **Enhanced Tool Life:** Significantly extends cutting tool longevity - **Good Corrosion Resistance:** Suitable for mild to moderate corrosive environments - **Increased Productivity:** Higher machining speeds and feeds achievable - **Consistent Performance:** Reliable machining characteristics across production batches --- #### **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 J92703:** Unified Numbering System designation - **ASME SA743:** ASME Boiler and Pressure Vessel Code equivalent - **ISO 11972:** Corrosion-resistant cast steels for general applications --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is precisely controlled with selenium addition for optimal machinability. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.16 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 1.50 max | | Phosphorus (P), max | 0.04 | | Sulfur (S) | 0.08-0.20 | | Chromium (Cr) | 18.0-21.0 | | Nickel (Ni) | 9.0-12.0 | | Selenium (Se) | 0.15-0.25 | | Iron (Fe) | Balance | *Note: The controlled selenium content provides superior machinability while minimizing the detrimental effects on corrosion resistance compared to high-sulfur grades.* --- #### **4. Mechanical Properties** Mechanical properties meet ASTM A743 requirements while maintaining machinability advantages. **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 **Typical Achievable Properties:** - **Tensile Strength:** 515-620 MPa (75-90 ksi) - **Yield Strength:** 240-310 MPa (35-45 ksi) - **Elongation:** 35-45% - **Hardness:** 150-180 HBW - **Machinability Rating:** 75-85% (based on B1112 steel standard) --- #### **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 --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **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 - **Objective:** To achieve homogeneous austenitic structure and optimal corrosion resistance **Stress Relieving (Optional):** - **Temperature:** 425-540°C (800-1000°F) - **Soak Time:** 1-2 hours per inch of thickness - **Purpose:** To relieve machining stresses in complex components --- #### **7. Corrosion Resistance** CF16Fa offers balanced corrosion resistance for its application range: - **General Corrosion:** Good resistance to mild corrosive environments - **Atmospheric Exposure:** Excellent performance in rural and urban atmospheres - **Fresh Water Systems:** Suitable for potable water applications - **Organic Compounds:** Adequate resistance to mild organic acids - **Comparative Performance:** Better corrosion resistance than high-sulfur free-machining grades - **Limitations:** Not recommended for severe corrosive or chloride-rich environments --- #### **8. Product Applications** CF16Fa is specifically designed for components requiring extensive machining operations: **Precision Components:** - Complex valve bodies and fittings - Pump components and housings - Hydraulic system parts - Precision instrument components **Automotive Applications:** - Fuel system components - Sensor housings - Decorative trim elements - Fastener components **Food Processing:** - Processing equipment parts - Mixing and blending components - Sanitary fittings - Conveyor system parts **General Manufacturing:** - Machine tool components - Textile machinery parts - Electrical connector bodies - Architectural hardware --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry controls - Pattern shrinkage: 20-25 mm/m - Requires attention to risering for sound castings - Suitable for intricate designs requiring subsequent machining **Machining Performance:** - **Excellent Machinability:** Superior to standard austenitic grades - **Cutting Parameters:** 35-50 m/min (115-165 SFM) for turning operations - **Tool Materials:** Carbide tools recommended for production efficiency - **Chip Characteristics:** Short, broken chips for easy disposal - **Surface Finish:** Excellent finish achievable with proper techniques **Welding Considerations:** - **Weldability:** Limited (not recommended for welded fabrication) - **Hot Cracking:** Susceptible due to selenium content - **Alternative Joining:** Mechanical fastening preferred for assembly --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Complete verification per ASTM A751 - **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 - **Machinability Evaluation:** Optional performance testing - **Microstructural Examination:** Inclusion content and distribution - **Certification:** Full material traceability with comprehensive documentation --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CF16Fa stainless steel under ASTM A743 is specifically engineered for applications requiring superior machinability and should be selected with consideration of its specific characteristics. The material offers improved corrosion resistance compared to sulfur-only free-machining grades but is not suitable for severe corrosive environments or welded constructions. Always consult the complete ASTM A743 standard and work with qualified materials engineers for specific application requirements. Performance characteristics may vary based on manufacturing processes, heat treatment, and service conditions. Proper machining parameters and tool selection are essential for achieving optimal performance benefits. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF16Fa, ASTM A743 Specification Dimensions Size： Diameter 20-1000 mm Length <4200 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 CF16Fa, ASTM A743 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CF16Fa, ASTM A743 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CF16Fa, ASTM A743 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CF16Fa, 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 671 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