Cast Stainless Steel Capillary CF16F, ASTM A743

Cast Stainless Steel Capillary CF16F, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Capillary CF16F, ASTM A743 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF16F, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF16F (ASTM A743)** #### **1. Product Overview** Cast Stainless Steel CF16F under ASTM A743 specification is an austenitic stainless steel specifically designed for improved machinability. This free-machining grade contains added sulfur or selenium to enhance cutting performance while maintaining good corrosion resistance. As the cast equivalent of wrought 303 stainless steel, CF16F offers an optimal balance between corrosion resistance and machining characteristics, making it ideal for high-volume production of complex components requiring extensive machining operations. **Key Advantages:** - **Excellent Machinability:** Superior cutting performance with improved chip breaking - **Good Corrosion Resistance:** Comparable to standard CF16 in mild corrosive environments - **Enhanced Productivity:** Reduced machining time and extended tool life - **Good Mechanical Properties:** Maintains adequate strength and ductility - **Cost-Effective Manufacturing:** Lower overall production costs for machined components --- #### **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 J92701:** 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 includes free-machining elements to enhance machinability. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.16 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 2.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S) | 0.15-0.35 | | Chromium (Cr) | 18.0-21.0 | | Nickel (Ni) | 9.0-12.0 | | Selenium (Se)* | 0.15-0.35 | *Note: Either sulfur or selenium may be used as the free-machining additive. The composition may include lead (Pb) up to 0.35% for further machinability enhancement where specified.* --- #### **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):** 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:** 70-80% (compared to 100% for B1112 steel) --- #### **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 dissolve carbides and achieve homogeneous austenitic structure **Important Considerations:** - Rapid cooling through 425-815°C (800-1500°F) range is essential - Stress relieving may be performed at 425-540°C (800-1000°F) - Avoid prolonged exposure in the sensitization temperature range --- #### **7. Corrosion Resistance** CF16F offers adequate corrosion resistance for many applications: - **General Corrosion:** Good resistance to mild corrosive environments - **Atmospheric Conditions:** Excellent resistance to rural and urban atmospheres - **Fresh Water:** Good performance in potable water systems - **Organic Acids:** Adequate resistance to mild organic acids - **Limitations:** Reduced corrosion resistance compared to non-free-machining grades due to sulfide inclusions - **Intergranular Corrosion:** Susceptible if improperly heat treated --- #### **8. Product Applications** CF16F cast stainless steel is primarily used for components requiring extensive machining: **Valve and Fitting Industry:** - Valve bodies and trim components - Pipe fittings and connectors - Pump components and impellers - Fluid handling system parts **Food Processing Equipment:** - Processing machine components - Mixing and blending equipment parts - Conveyor system components - Sanitary fittings **Automotive Industry:** - Fuel system components - Emission control parts - Decorative trim components - Fasteners and fittings **Other Applications:** - Pharmaceutical equipment components - Textile machinery parts - Architectural hardware - General machinery components --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-25 mm/m - Requires attention to feeding for sound castings - Suitable for complex geometries requiring subsequent machining **Machining:** - **Excellent Machinability:** Superior to standard austenitic stainless steels - **Cutting Speeds:** 30-45 m/min (100-150 SFM) for turning operations - **Tool Materials:** Carbide tools recommended for production runs - **Chip Control:** Excellent chip breaking characteristics - **Surface Finish:** Good finish achievable with proper techniques **Welding:** - **Weldability:** Fair (requires special considerations) - **Preheating:** Generally not required - **Filler Metals:** E309 or E310 recommended - **Limitations:** Not recommended for critical welded applications due to hot cracking susceptibility --- #### **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 - **Machinability Testing:** Optional evaluation of cutting performance - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CF16F stainless steel under ASTM A743 is specifically designed for applications requiring excellent machinability and should be selected with consideration of its reduced corrosion resistance compared to non-free-machining grades. 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. CF16F is not recommended for severe corrosive environments or applications requiring extensive welding. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF16F, ASTM A743 Specification Dimensions Size： Diameter 20-1000 mm Length <4199 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 CF16F, ASTM A743 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Capillary CF16F, ASTM A743 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Capillary CF16F, ASTM A743 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Capillary CF16F, 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 Capillary 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 670 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