Cast Stainless Steel Sheet,Plate CD4MCu, ASTM A890

Cast Stainless Steel Sheet/Plate CD4MCu, ASTM A890 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Sheet/Plate CD4MCu, ASTM A890 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CD4MCu, ASTM A890 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CD4MCu, ASTM A890** #### **1. Product Overview** Cast Stainless Steel CD4MCu under ASTM A890 specification is a duplex (austenitic-ferritic) stainless steel belonging to the 25Cr-5Ni-2Mo-3Cu family, specifically designed for superior corrosion resistance in demanding environments. This grade offers an optimal balance of high strength and exceptional corrosion resistance, particularly in chloride-containing environments where stress corrosion cracking is a concern. The duplex microstructure provides approximately twice the yield strength of conventional austenitic stainless steels while maintaining excellent toughness and corrosion resistance. **Key Advantages:** - **Superior Corrosion Resistance:** Excellent performance in chloride-containing environments - **High Mechanical Strength:** Double the yield strength of standard austenitic grades - **Excellent Stress Corrosion Cracking Resistance:** Outstanding resistance to SCC - **Good Erosion-Corrosion Resistance:** Suitable for high-velocity fluid applications - **Cost-Effective Solution:** Better performance-to-cost ratio than high-nickel alloys --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A890/A890M:** Standard Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application Additional applicable standards: - **UNS J93370:** Unified Numbering System designation - **ASME SA890:** 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 to maintain the optimal duplex 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 40-60% ferrite content in the final microstructure.* --- #### **4. Mechanical Properties** Mechanical properties meet ASTM A890 requirements for Grade 1A (CD4MCu). **Minimum Required Values (Solution Annealed 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:** 0.28 - **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** **Solution Annealing Treatment:** - **Temperature:** 1120-1170°C (2050-2140°F) - **Soak Time:** 1 hour per inch of thickness, minimum 1 hour - **Cooling:** Rapid water quench - **Microstructure Target:** 40-60% ferrite in austenitic matrix **Important Considerations:** - Avoid temperatures between 300-1000°C (570-1830°F) to prevent embrittlement - Rapid cooling through the 1200-800°F (650-425°C) range is critical - No stress relief heat treatment above 300°C (570°F) is permitted --- #### **7. Corrosion Resistance** CD4MCu offers excellent corrosion resistance characteristics: - **Chloride Stress Corrosion Cracking:** Superior to 300-series austenitic stainless steels - **Pitting and Crevice Corrosion:** Excellent resistance (PREN > 35) - **General Corrosion:** Good resistance to sulfuric, phosphoric, and organic acids - **Erosion-Corrosion:** Outstanding performance in high-velocity applications - **Intergranular Corrosion:** Excellent resistance when properly heat treated --- #### **8. Product Applications** CD4MCu under ASTM A890 is widely used in demanding corrosive applications: **Primary Applications Include:** - **Chemical Processing:** Reactors, heat exchangers, and mixing vessels - **Oil and Gas Industry:** Wellhead components, valves, and piping systems - **Pump Components:** Casings, impellers for corrosive and abrasive services - **Marine Applications:** Seawater system components and marine hardware - **Pollution Control:** Scrubbers and wastewater treatment equipment - **Pulp and Paper Industry:** Digester and bleaching equipment - **Power Generation:** FGD systems and cooling water components --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-25 mm/m - Requires controlled solidification - Suitable for complex geometries **Machining:** - More difficult than austenitic stainless steels - Use positive rake carbide tools - Recommended cutting speeds: 15-25 m/min (50-80 SFM) - Adequate cooling required **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: Not recommended --- #### **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 - Magnetic particle examination per ASTM E709 - **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 A890 requires strict control of chemical composition and heat treatment to maintain optimal properties. Performance may vary based on specific service conditions and manufacturing processes. Always consult the complete ASTM A890 standard and qualified materials engineers for critical applications. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CD4MCu, ASTM A890 Specification Dimensions Size： Diameter 20-1000 mm Length <4177 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 A890 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Sheet,Plate CD4MCu, ASTM A890 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Sheet,Plate CD4MCu, ASTM A890 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Sheet/Plate CD4MCu, ASTM A890 -:- 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 Sheet/Plate 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 648 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