Cast Stainless Steel Foil/Strip CF8M, ASTM A743

Cast Stainless Steel Foil CF8M, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Foil CF8M, ASTM A743 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF8M, ASTM A743 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF8M (ASTM A743)** #### **1. Product Overview** Cast Stainless Steel CF8M under ASTM A743 specification is an austenitic stainless steel casting alloy that represents the cast equivalent of wrought 316 stainless steel. This chromium-nickel-molybdenum alloy offers enhanced corrosion resistance compared to standard CF8 alloy, particularly in chloride-containing environments. The "M" designation indicates the presence of molybdenum, which significantly improves pitting and crevice corrosion resistance, making it an ideal choice for various corrosive applications where superior performance is required. **Key Advantages:** - **Enhanced Corrosion Resistance:** Superior performance in chloride-containing environments - **Excellent Pitting Resistance:** Molybdenum addition provides improved resistance to pitting corrosion - **Good Crevice Corrosion Resistance:** Performs well in stagnant and crevice conditions - **Versatile Application Range:** Wide usability across various corrosive media - **Good Fabricability:** Excellent casting and welding characteristics --- #### **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 J92900:** 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 carefully controlled to optimize corrosion resistance and mechanical properties. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.08 max | | Manganese (Mn) | 1.50 max | | Silicon (Si) | 1.50 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 18.0-21.0 | | Nickel (Ni) | 9.0-12.0 | | Molybdenum (Mo) | 2.0-3.0 | *Note: The molybdenum content is critical for enhanced pitting and crevice corrosion resistance in chloride environments.* --- #### **4. Mechanical Properties** Mechanical properties are determined in the solution-annealed condition as required by ASTM A743. **Minimum Required Values:** - **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:** 35-50% - **Hardness:** 150-180 HBW - **Impact Strength:** Excellent at cryogenic temperatures --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.98 g/cm³ (0.288 lb/in³) - **Modulus of Elasticity:** 193 GPa (28,000 ksi) - **Poisson's Ratio:** 0.28 - **Thermal Conductivity:** 16.3 W/m·K (at 100°C) - **Specific Heat Capacity:** 500 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 16.0 × 10⁻⁶/°C (20-100°C) - **Electrical Resistivity:** 0.74 μΩ·m - **Magnetic Permeability:** Essentially non-magnetic --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature Range:** 1040-1150°C (1900-2100°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 **Critical Processing Parameters:** - Rapid cooling through 425-815°C (800-1500°F) range is essential - Prevents chromium carbide precipitation at grain boundaries - Ensures maximum corrosion resistance --- #### **7. Corrosion Resistance** CF8M offers enhanced corrosion resistance characteristics: - **Pitting Corrosion:** Excellent resistance due to molybdenum content (PREN ~24-26) - **Crevice Corrosion:** Superior performance in stagnant conditions - **Chloride Environments:** Good resistance to chloride-induced corrosion - **General Corrosion:** Excellent resistance to a wide range of corrosive media - **Intergranular Corrosion:** Good resistance when properly heat treated - **Acid Resistance:** Good performance in sulfuric, phosphoric, and organic acids --- #### **8. Product Applications** CF8M cast stainless steel is widely used in various industries requiring enhanced corrosion resistance: **Chemical Processing Industry:** - Reactors and mixing vessels - Heat exchangers and condensers - Process piping systems and valves **Marine and Offshore Applications:** - Seawater handling systems - Pump components and valve bodies - Marine hardware and fittings **Food and Pharmaceutical Industry:** - Processing equipment for corrosive media - Storage and mixing tanks - Sanitary processing systems **Oil and Gas Industry:** - Process equipment components - Valve components and fittings - Pipeline accessories **Other Applications:** - Pulp and paper processing equipment - Water treatment components - Pollution control equipment --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-25 mm/m - Low hot tearing tendency - Suitable for complex geometries **Machining:** - Good machinability in solution 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:** E316 or ER316 - **Post-weld Heat Treatment:** Generally not required --- #### **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. CF8M 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. CF8M offers improved corrosion resistance over CF8 but may not be suitable for highly oxidizing or severe chloride environments where more highly alloyed materials would be required. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF8M, ASTM A743 Specification Dimensions Size： Diameter 20-1000 mm Length <4190 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 CF8M, ASTM A743 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Foil CF8M, ASTM A743 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Foil CF8M, ASTM A743 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Foil/Strip CF8M, 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 Foil/Strip 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 661 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