Cast Stainless Steel Foil/Strip CH20, UNS J93402

Cast Stainless Steel Foil CH20, UNS J93402 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Foil CH20, UNS J93402 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CH20, UNS J93402 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Datasheet: Cast Stainless Steel CH20 (UNS J93402)** #### **1. Product Overview** Cast Stainless Steel CH20 (UNS J93402) is a heat-resistant austenitic stainless steel designed for elevated temperature applications. This chromium-nickel alloy offers excellent oxidation resistance and maintains good mechanical properties at temperatures up to 1150°C (2100°F). The material is particularly suitable for applications involving thermal cycling, corrosive atmospheres, and prolonged exposure to high temperatures, making it a reliable choice for various industrial heating and processing equipment. **Key Advantages:** - **Excellent High-Temperature Strength:** Maintains mechanical integrity under sustained thermal exposure - **Superior Oxidation Resistance:** Outstanding scaling resistance in oxidizing atmospheres - **Good Thermal Fatigue Resistance:** Withstands repeated thermal cycling conditions - **Microstructural Stability:** Resists phase transformation and embrittlement - **Versatile Performance:** Suitable for various high-temperature environments --- #### **2. International Standard** This product conforms to the following international standards: - **UNS J93402:** Unified Numbering System designation - **ASTM A743/A743M:** Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel - **ASTM A297/A297M:** Standard for Heat-Resistant Steel Castings - **ASME SA743:** ASME Boiler and Pressure Vessel Code equivalent - **ISO 11972:** Corrosion-resistant cast steels --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is controlled to ensure optimal high-temperature performance. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.20 max | | Manganese (Mn) | 2.00 max | | Silicon (Si) | 0.75-1.50 | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.04 | | Chromium (Cr) | 22.0-26.0 | | Nickel (Ni) | 12.0-15.0 | | Iron (Fe) | Balance | *Note: The balanced chromium and nickel content provides optimal high-temperature strength and oxidation resistance characteristics.* --- #### **4. Mechanical Properties** Mechanical properties meet standard requirements for high-temperature service. **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):** 25.0% min **Elevated Temperature Properties (Typical):** - **At 870°C (1600°F):** Tensile Strength: 85-100 MPa (12-14.5 ksi) - **At 980°C (1800°F):** Tensile Strength: 65-80 MPa (9.4-11.6 ksi) - **Creep Strength:** Good performance up to 1150°C (2100°F) - **Stress Rupture:** Maintains integrity under sustained loading --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.90 g/cm³ (0.285 lb/in³) - **Modulus of Elasticity:** 195 GPa (28,300 ksi) at 21°C - **Poisson's Ratio:** 0.28 - **Thermal Conductivity:** 14.5 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:** 0.85 μΩ·m - **Magnetic Permeability:** Essentially non-magnetic --- #### **6. Heat Treatment** **Solution Annealing Treatment:** - **Temperature Range:** 1120-1170°C (2050-2140°F) - **Soak Time:** 1-2 hours per inch of thickness - **Cooling Method:** Rapid water quench or air cool - **Objective:** To achieve homogeneous austenitic structure **Stress Relieving (Optional):** - **Temperature:** 870-925°C (1600-1700°F) - **Purpose:** To relieve residual stresses --- #### **7. High-Temperature Performance** UNS J93402 offers reliable performance in high-temperature applications: - **Oxidation Resistance:** Excellent scaling resistance up to 1150°C (2100°F) - **Creep Strength:** Good resistance to deformation under prolonged stress - **Thermal Fatigue:** Excellent performance under thermal cycling - **Carburization Resistance:** Adequate performance in carburizing atmospheres - **Structural Stability:** Resists embrittlement phases formation --- #### **8. Product Applications** UNS J93402 cast stainless steel is used in various high-temperature applications: **Heat Treatment Industry:** - Furnace components - Heat treatment fixtures - Annealing equipment - Carburizing containers **Petrochemical Industry:** - Process heater parts - Reform furnace components - High-temperature piping - Reactor internals **Power Generation:** - Boiler components - Heat exchanger parts - High-temperature ducting - Burner components **Other Applications:** - Ceramic kiln furniture - Glass manufacturing equipment - Incinerator parts - Thermal processing fixtures --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 25-30 mm/m - Requires adequate feeding for sound castings - Suitable for complex components **Machining:** - Moderate machinability in annealed condition - Work hardens during machining - Use carbide tools with positive rake angles - Recommended cutting speeds: 15-25 m/min (50-80 SFM) **Welding:** - **Weldability:** Good with proper procedures - **Preheating:** 150-200°C (300-400°F) recommended - **Interpass Temperature:** 200-250°C (400-480°F) - **Filler Metals:** ENiCrFe-3 or equivalent alloys - **Post-weld Heat Treatment:** Stress relief recommended --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Complete composition verification - **Mechanical Testing:** Tensile and hardness testing - **Non-Destructive Testing:** - Radiographic examination - Liquid penetrant testing - **High-Temperature Testing:** - Oxidation resistance testing - Creep testing available - **Certification:** Full material traceability with test reports --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. UNS J93402 (CH20) stainless steel is designed for high-temperature applications and requires careful consideration of service conditions. Performance characteristics may vary based on specific manufacturing processes, heat treatment parameters, and service conditions. Always consult relevant standards and work with qualified materials engineers for critical applications. Proper design considerations for thermal expansion, creep behavior, and atmospheric compatibility are essential for successful performance. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CH20, UNS J93402 Specification Dimensions Size： Diameter 20-1000 mm Length <4205 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 CH20, UNS J93402 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Foil CH20, UNS J93402 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Foil CH20, UNS J93402 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Foil/Strip CH20, UNS J93402 -:- 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 676 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