Cast Stainless Steel Capillary CD4MCu, ASTM A351

Cast Stainless Steel Capillary CD4MCu, ASTM A351 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Capillary CD4MCu, ASTM A351 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CD4MCu, ASTM A351 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CD4MCu, ASTM A351** #### **1. Product Overview** Cast Stainless Steel CD4MCu under ASTM A351 specification is a duplex (austenitic-ferritic) stainless steel that combines high strength with excellent resistance to stress corrosion cracking and erosion-corrosion. This chromium-nickel-molybdenum-copper alloy offers an optimal balance of mechanical properties and corrosion resistance, making it particularly suitable for demanding applications in corrosive environments, especially those containing chlorides. **Key Advantages:** - **Excellent Corrosion Resistance:** Superior performance in chloride-containing environments - **High Mechanical Strength:** Approximately twice the yield strength of standard austenitic stainless steels - **Good Resistance to Stress Corrosion Cracking:** Excellent performance in environments susceptible to SCC - **Excellent Erosion-Corrosion Resistance:** Ideal for applications involving high-velocity fluids - **Good Wear Resistance:** Suitable for abrasive service conditions --- #### **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 J93370:** Unified Numbering System designation - **ASME SA351:** 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 carefully balanced to maintain the optimal austenitic-ferritic microstructure. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.04 max | | Manganese (Mn) | 1.00 max | | Silicon (Si) | 1.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 24.5-26.5 | | Nickel (Ni) | 4.75-6.00 | | Molybdenum (Mo) | 1.75-2.25 | | Copper (Cu) | 2.75-3.25 | | Nitrogen (N) | 0.10-0.25 | *Note: The balanced composition ensures approximately 50/50 austenite-ferrite microstructure.* --- #### **4. Mechanical Properties** Mechanical properties are determined in the heat-treated condition as required by ASTM A351. **Minimum Required Values (Heat-Treated Condition):** - **Tensile Strength:** 690 MPa (100 ksi) min - **Yield Strength (0.2% Offset):** 485 MPa (70 ksi) min - **Elongation in 2" (50 mm):** 20% min - **Reduction of Area:** 35% min - **Hardness:** 290 HBW max **Typical Achievable Properties:** - **Tensile Strength:** 760-895 MPa (110-130 ksi) - **Yield Strength:** 550-690 MPa (80-100 ksi) - **Elongation:** 25-30% - **Impact Energy:** 100 J (74 ft-lb) min at room temperature --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.80 g/cm³ (0.282 lb/in³) - **Modulus of Elasticity:** 186 GPa (27,000 ksi) - **Poisson's Ratio:** 0.27-0.30 - **Thermal Conductivity:** 15.0 W/m·K (at 100°C) - **Specific Heat Capacity:** 500 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 13.0 × 10⁻⁶/°C (20-100°C) - **Magnetic Permeability:** Slightly magnetic due to ferritic phase --- #### **6. Heat Treatment** **Standard Heat Treatment:** **Solution Annealing:** - Temperature: 1120-1170°C (2050-2140°F) - Soak time: 1-2 hours per inch of thickness - Cooling: Rapid water quench to preserve duplex structure - Objective: To achieve approximately 50% austenite and 50% ferrite **Important Note:** - Avoid temperatures between 300-1000°C (570-1830°F) to prevent embrittlement - Do not stress relieve at temperatures above 300°C (570°F) --- #### **7. Corrosion Resistance** - **Chloride Stress Corrosion Cracking:** Excellent resistance, superior to 300-series austenitic stainless steels - **Pitting and Crevice Corrosion:** Very good resistance due to high chromium, molybdenum, and nitrogen content - **General Corrosion:** Excellent resistance to various acids, including sulfuric and phosphoric acids - **Erosion-Corrosion:** Outstanding performance in high-velocity fluid applications - **Intergranular Corrosion:** Good resistance when properly heat treated --- #### **8. Product Applications** CD4MCu cast stainless steel is widely used in aggressive environments across various industries. **Primary Applications Include:** - **Chemical Processing Equipment:** Reactors, columns, and heat exchangers - **Oil and Gas Industry:** Christmas tree components, valves, and fittings - **Pump Components:** Casings, impellers, and diffusers for corrosive services - **Marine Applications:** Propeller hubs, seawater system components - **Pollution Control Equipment:** Scrubbers, absorbers, and environmental systems - **Pulp and Paper Industry:** Digester and bleaching equipment - **Power Generation:** FGD system components and cooling water systems --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-25 mm/m - Requires careful solidification control - Suitable for complex geometries and heavy sections **Machining:** - More difficult to machine than austenitic stainless steels - Use rigid setups and positive rake tools - Recommended cutting speeds: 15-25 m/min (50-80 SFM) - Adequate cooling essential **Welding:** - **Weldability:** Fair to good with proper procedures - Preheating: Generally not required - Interpass temperature: Max 150°C (300°F) - Filler metals: Over-alloyed duplex or nickel-base electrodes - Post-weld heat treatment: Generally not recommended --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Per ASTM A751 requirements - **Mechanical Testing:** Tensile tests per ASTM A370 from cast-on coupons - **Hardness Testing:** Multiple location verification - **Non-Destructive Testing:** - Radiographic examination per ASTM E94 - Liquid penetrant examination per ASTM E165 - Magnetic particle examination per ASTM E709 - **Corrosion Testing:** Optional per customer requirements - **Ferrite Content:** Typically 35-55% measured per ASTM A800 - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CD4MCu under ASTM A351 requires strict control of chemical composition and heat treatment to maintain the proper duplex microstructure. 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 applications. Proper quality control and adherence to specified heat treatment procedures are essential for achieving optimal corrosion resistance and mechanical properties in duplex stainless steel castings. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CD4MCu, ASTM A351 Specification Dimensions Size： Diameter 20-1000 mm Length <4175 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 CD4MCu, ASTM A351 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Capillary CD4MCu, ASTM A351 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Capillary CD4MCu, ASTM A351 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Capillary CD4MCu, 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 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 646 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