Cast Stainless Steel Tube,Pipe CB7Cu-1, ASTM A747

Cast Stainless Steel Tube CB7Cu-1, ASTM A747 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Tube CB7Cu-1, ASTM A747 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CB7Cu-1, ASTM A747 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CB7Cu-1, ASTM A747** #### **1. Product Overview** Cast Stainless Steel CB7Cu-1 (also known as 17-4PH) under ASTM A747 specification is a precipitation-hardening martensitic stainless steel that combines high strength with good corrosion resistance. This chromium-nickel-copper alloy develops its superior mechanical properties through a simple aging treatment at moderate temperatures, resulting in an excellent combination of strength, toughness, and corrosion resistance. The material is particularly valued for its versatility and ability to achieve high strength levels while maintaining good dimensional stability during heat treatment. **Key Advantages:** - **High Strength-to-Weight Ratio:** Exceptional mechanical properties achievable through aging treatment - **Good Corrosion Resistance:** Superior to conventional martensitic stainless steels - **Simple Heat Treatment:** Minimal distortion during aging process - **Excellent Mechanical Properties:** High strength combined with good fracture toughness - **Outstanding Fatigue Resistance:** Suitable for dynamic loading applications --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A747/A747M:** Standard Specification for Steel Castings, Stainless, Precipitation Hardening Additional applicable standards: - **UNS J92180:** Unified Numbering System designation - **AMS 5355:** Aerospace Material Specification - **ASME SA747:** ASME Boiler and Pressure Vessel Code equivalent --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is precisely controlled to achieve optimal precipitation hardening response. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.07 max | | Manganese (Mn) | 1.00 max | | Silicon (Si) | 1.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.03 | | Chromium (Cr) | 15.0-17.5 | | Nickel (Ni) | 3.0-5.0 | | Copper (Cu) | 2.5-4.0 | | Columbium + Tantalum (Cb+Ta) | 0.15-0.45 | *Note: The composition may include residual elements within specified limits to enhance specific properties.* --- #### **4. Mechanical Properties** Mechanical properties vary with the specific aging treatment condition. **Condition H1150 (Aged at 1150°F/620°C):** - **Tensile Strength:** 1000 MPa (145 ksi) min - **Yield Strength (0.2% Offset):** 860 MPa (125 ksi) min - **Elongation in 2" (50 mm):** 10% min - **Reduction of Area:** 35% min - **Hardness:** 302-352 HBW **Condition H1100 (Aged at 1100°F/595°C):** - **Tensile Strength:** 1070 MPa (155 ksi) min - **Yield Strength:** 1000 MPa (145 ksi) min - **Elongation:** 8% min - **Hardness:** 331-375 HBW --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.78 g/cm³ (0.281 lb/in³) - **Modulus of Elasticity:** 200 GPa (29,000 ksi) - **Poisson's Ratio:** 0.27-0.30 - **Thermal Conductivity:** 18.0 W/m·K (at 100°C) - **Specific Heat Capacity:** 460 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 10.8 × 10⁻⁶/°C (20-100°C) - **Magnetic Permeability:** Magnetic in aged condition --- #### **6. Heat Treatment** **Standard Heat Treatment Sequence:** **Solution Treatment:** - Temperature: 1025-1065°C (1875-1950°F) - Soak time: 1 hour per inch of thickness minimum - Cooling: Air cool or oil quench **Aging Treatment Options:** - **Condition H1150:** 595-620°C (1100-1150°F) for 4 hours - **Condition H1100:** 565-595°C (1050-1100°F) for 4 hours - **Condition H1075:** 565-595°C (1050-1100°F) for 4 hours (for maximum strength) - Cooling: Air cool after aging --- #### **7. Corrosion Resistance** - **Atmospheric:** Excellent resistance to industrial and marine atmospheres - **Fresh Water:** Very good resistance to fresh water and steam - **Chemical Media:** - Good resistance to organic acids and alkalis - Moderate resistance to dilute mineral acids - Better corrosion resistance than Type 410 and 304 in many environments - **Stress Corrosion Cracking:** Good resistance in aged conditions - **Pitting Resistance:** Moderate resistance to pitting corrosion --- #### **8. Product Applications** CB7Cu-1 under ASTM A747 is widely used in applications requiring high strength combined with good corrosion resistance. **Primary Applications Include:** - **Aerospace Components:** Structural parts, landing gear components, and engine mounts - **Nuclear Industry:** Valve bodies, pump components, and structural supports - **Chemical Processing:** Mixer shafts, agitators, and process equipment - **Marine Equipment:** Propeller shafts, submarine components, and deck hardware - **Oil & Gas Industry:** Valve trims, wellhead components, and downhole tools - **Power Generation:** Turbine blades, fasteners, and structural components --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry practices - Pattern shrinkage: 20-22 mm/m - Requires careful gating and risering - Suitable for complex geometries **Machining:** - Best machined in solution-treated condition - Use carbide tools with positive rake angles - Recommended cutting speeds: 20-30 m/min (65-100 SFM) - Adequate cooling required **Welding:** - **Weldability:** Good with proper procedures - Preheating: Generally not required - Post-weld heat treatment: Full solution treatment and aging recommended - Recommended filler metals: Matching composition or 630-type electrodes --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Per ASTM A751 requirements - **Mechanical Testing:** Tensile tests per ASTM A370 - **Hardness Testing:** Brinell or Rockwell methods - **Non-Destructive Testing:** - Radiographic examination per ASTM E94 - Liquid penetrant examination per ASTM E165 - Magnetic particle examination per ASTM E709 - **Heat Treatment Certification:** Complete documentation of solution and aging treatments - **Quality Requirements:** Meets ASTM A747 for precipitation hardening stainless castings - **Certification:** Full traceability with comprehensive mill test certificates --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CB7Cu-1 under ASTM A747 requires specific heat treatment to achieve desired properties. The material's performance may vary based on aging treatment, casting design, and service conditions. Always consult the complete ASTM A747 standard and qualified materials engineers for critical applications. Proper selection of aging condition is essential to achieve the optimal balance of strength, toughness, and corrosion resistance for specific applications. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CB7Cu-1, ASTM A747 Specification Dimensions Size： Diameter 20-1000 mm Length <4171 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 CB7Cu-1, ASTM A747 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Tube CB7Cu-1, ASTM A747 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Tube CB7Cu-1, ASTM A747 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Tube CB7Cu-1, ASTM A747 -:- 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 Tube 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 642 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