Cast Stainless Steel Rod/Bar CF8M, ASTM A351

Cast Stainless Steel Rod CF8M, ASTM A351 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Rod CF8M, ASTM A351 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CF8M, ASTM A351 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CF8M (ASTM A351)** #### **1. Product Overview** Cast Stainless Steel CF8M under ASTM A351 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 pressure-containing parts in corrosive service applications. **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 - **Pressure-Containing Design:** Suitable for pressure vessel and valve applications - **Versatile Application Range:** Wide usability across various corrosive media --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A351/A351M:** Standard Specification for Castings, Austenitic, Austenitic-Ferritic (Duplex), for Pressure-Containing Parts Additional applicable standards: - **UNS J92900:** Unified Numbering System designation - **ASME SA351:** 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 for pressure-containing applications. | 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 meet ASTM A351 requirements for pressure-containing parts. **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:** 35-50% - **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 for pressure service --- #### **7. Corrosion Resistance** CF8M offers enhanced corrosion resistance for pressure-containing applications: - **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 pressure-containing applications across multiple industries: **Chemical Processing Industry:** - Pressure vessels and reactors - Heat exchangers and condensers - Process piping systems and valves **Oil and Gas Applications:** - Wellhead components - Valve bodies and fittings - Process equipment for corrosive service **Power Generation:** - Pump casings and components - Valve bodies for utility service - Heat exchanger components **Marine and Offshore:** - Seawater handling systems - Pump components and valve bodies - Marine hardware and fittings **Other Applications:** - Pharmaceutical processing equipment - Food processing in corrosive environments - Water treatment system components --- #### **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 and pressure-containing parts **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 from separately cast coupons - **Hardness Testing:** Multiple location verification - **Non-Destructive Testing:** - Radiographic examination per ASTM E94 - Liquid penetrant examination per ASTM E165 - Additional NDT as required by specification - **Hydrostatic Testing:** Required for pressure-containing applications - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CF8M stainless steel under ASTM A351 is designed for pressure-containing applications and requires strict adherence to specified chemical composition, heat treatment, and quality assurance procedures. The material's performance may vary based on specific service conditions, casting design, and manufacturing processes. Always consult the complete ASTM A351 standard and work with qualified materials engineers for critical pressure-containing applications. Proper design, fabrication, and testing are essential for ensuring safe performance in pressure service conditions. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CF8M, ASTM A351 Specification Dimensions Size： Diameter 20-1000 mm Length <4189 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 A351 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Rod CF8M, ASTM A351 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Rod CF8M, ASTM A351 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Rod CF8M, ASTM A351 -:- 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 Rod 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 660 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