Alloy 925,Incoloy 925 Forgings,UNS N09925,E FORU

British Specs:，American Specs:，German Specs:

### **Product Datasheet: Alloy 925 / Incoloy 925 Forgings (UNS N09925)** **Alloy 925** (commercially known as **Incoloy 925**) forgings represent the premium product form of this precipitation-hardenable nickel-iron-chromium alloy, offering superior mechanical properties and structural integrity for critical applications. The forging process enhances the alloy's inherent characteristics, providing optimized grain structure, improved toughness, and elimination of internal defects for demanding service conditions in corrosive and high-stress environments. --- #### **1. Chemical Composition** The chemical composition of Alloy 925 forgings is precisely controlled to ensure consistent performance: | Element | Content (%) | |:---|:---| | **Nickel (Ni)** | 42.0 - 46.0 | | **Chromium (Cr)** | 19.5 - 23.5 | | **Iron (Fe)** | 22.0 min | | **Molybdenum (Mo)** | 2.5 - 3.5 | | **Copper (Cu)** | 1.5 - 3.0 | | **Titanium (Ti)** | 1.9 - 2.4 | | **Aluminum (Al)** | 0.1 - 0.5 | | **Carbon (C)** | 0.03 max | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.50 max | | **Sulfur (S)** | 0.03 max | | **Phosphorus (P)** | 0.03 max | *Note: The balanced composition provides excellent age-hardening response through gamma prime precipitation (Ti, Al) while maintaining superior corrosion resistance in sour gas and chloride environments (Cr, Mo, Cu).* --- #### **2. Physical Properties** Alloy 925 forgings exhibit consistent physical properties: | Property | Value | |:---|:---| | **Density** | 8.08 g/cm³ (0.292 lb/in³) | | **Melting Range** | 1370 - 1400°C (2500 - 2550°F) | | **Coefficient of Thermal Expansion** | 14.2 × 10⁻⁶/°C (20-100°C) | | **Thermal Conductivity** | 11.5 W/m·K (at 100°C) | | **Specific Heat** | 448 J/kg·K (at 100°C) | | **Modulus of Elasticity** | 196 GPa (28.4 × 10⁶ psi) | | **Magnetic Permeability** | <1.005 (essentially non-magnetic) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Aged Condition per ASTM B564):** | Property | Value | |:---|:---| | **Tensile Strength** | 1035 MPa (150 ksi) min | | **Yield Strength (0.2% Offset)** | 860 MPa (125 ksi) min | | **Elongation** | 15% min | | **Reduction of Area** | 35% min | | **Hardness** | 269 - 321 HB | | **Impact Strength (Charpy V-Notch)** | 45 J min | **Elevated Temperature Properties:** - **Service Temperature:** Up to 650°C (1200°F) - **Creep Strength:** 240 MPa at 540°C (1000°F) - **Stress Rupture:** 1000 hours at 620°C (1150°F) under 170 MPa stress --- #### **4. Product Specifications** **Available Forging Types:** - **Open Die Forgings:** Large components up to 5000 kg - **Closed Die Forgings:** Precision shapes with minimal machining - **Ring Rolled Forgings:** Seamless rings up to 4000 mm diameter - **Custom Shapes:** Engineered to customer specifications **Size Capabilities:** - **Weight Range:** 1 kg to 5000 kg - **Cross Sections:** Up to 1000 mm - **Lengths:** Up to 6000 mm - **Complexity:** Simple to highly complex geometries --- #### **5. Product Applications** **Oil & Gas Industry:** - **Wellhead Components:** Christmas tree bodies, valve bodies - **Downhole Tools:** Drill collars, heavy-weight drill pipe - **Subsea Equipment:** Manifold blocks, connector bodies - **Valve Components:** Gates, globes, check valves - **Sour Service Applications:** H₂S resistant components **Chemical Processing:** - **Reactor Parts:** Agitators, mixing elements - **Pump Components:** Casings, impellers, shafts - **Valve Bodies:** For corrosive service - **High-Pressure Vessels:** Closures and covers **Aerospace & Defense:** - **Engine Components:** Mounting brackets, supports - **Structural Parts:** High-strength corrosion-resistant elements - **Landing Gear Components:** High-stress parts - **Military Vehicle Parts:** Armor and structural components **Power Generation:** - **Turbine Components:** Blades, disks, shafts - **Generator Parts:** Rotor elements, end bells - **Nuclear Components:** Control rod mechanisms - **Heat Exchanger Parts:** Tube sheets, headers --- #### **6. International Standards** **Material Standards:** - **UNS N09925**: Unified Numbering System designation - **ASTM B564**: Standard Specification for Nickel Alloy Forgings - **ASME SB564**: ASME Boiler and Pressure Vessel Code - **AMS 5895**: Aerospace Material Specification - **DIN 2.4852**: German Industrial Standard **Industry Specifications:** - **NACE MR0175/ISO 15156**: For sour service applications - **API 6A**: Wellhead and Christmas Tree Equipment - **API 20B**: Open Die Forgings for Petroleum Industry - **PED 2014/68/EU**: Pressure Equipment Directive **Quality Standards:** - **ASTM A388**: Ultrasonic Examination of Heavy Steel Forgings - **ASTM E165**: Liquid Penetrant Examination - **ASTM E709**: Magnetic Particle Examination - **ISO 9001**: Quality Management Systems --- #### **7. Forging Process Advantages** **Metallurgical Benefits:** - **Refined Grain Structure:** Superior to cast or machined components - **Improved Density:** Elimination of porosity and voids - **Enhanced Toughness:** Superior impact and fatigue resistance - **Optimal Grain Flow:** Contoured to part geometry for maximum strength **Quality Enhancements:** - **Homogeneous Structure:** Consistent properties throughout - **Reduced Defects:** Minimal internal and surface imperfections - **Better Fatigue Life:** Superior resistance to cyclic loading - **Improved Reliability:** Proven performance in critical applications --- #### **8. Heat Treatment** **Standard Heat Treatment Cycle:** 1. **Solution Annealing:** 1095-1120°C (2000-2050°F) + rapid quench 2. **Aging Treatment:** 620-650°C (1150-1200°F) for 8-16 hours, air cool **Special Heat Treatments:** - **Annealing Only:** For subsequent machining operations - **Double Aging:** For enhanced strength properties - **Stress Relieving:** After heavy machining - **Solution Treating:** For optimum corrosion resistance --- #### **9. Corrosion Resistance** **Excellent Performance In:** - **Sour Gas Environments:** H₂S and CO₂ containing systems - **Chloride Solutions:** Superior stress corrosion cracking resistance - **Acidic Conditions:** Sulfuric, phosphoric, and organic acids - **Alkaline Media:** Good resistance to caustic environments - **Marine Atmospheres:** Excellent pitting and crevice corrosion resistance **Corrosion Performance Data:** - **Critical Pitting Temperature:** >85°C - **NACE TM0177 Method A:** Excellent performance - **General Corrosion Rate:** <0.1 mm/year in most environments - **Intergranular Corrosion:** Resistant after proper heat treatment --- #### **10. Machining & Fabrication** **Machining Characteristics:** - **Machinability Rating:** 25-35% (compared to 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Parameters:** Moderate speeds with positive rake angles - **Coolant Requirements:** Essential for optimum results **Welding Capabilities:** - **Recommended Processes:** GTAW, GMAW, SMAW - **Filler Metals:** ERNiFeCr-1 or equivalent - **Preheat/Interpass:** Generally not required - **Post-Weld Heat Treatment:** Recommended for critical applications --- #### **11. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness, impact tests - **Non-Destructive Testing:** UT, MT, PT, RT as required - **Macro/Micro Examination:** Grain structure verification - **Dimensional Inspection:** To drawing specifications **Quality Documentation:** - **Material Certificates:** EN 10204 3.1/3.2 - **Process Documentation:** Complete manufacturing records - **Heat Treatment Charts:** Certified temperature records - **Final Inspection Reports:** Comprehensive quality verification --- #### **12. Key Advantages** * **Superior Mechanical Properties:** Enhanced strength and toughness through forging process * **Excellent Corrosion Resistance:** Outstanding performance in aggressive environments * **Structural Integrity:** Optimized grain flow for maximum reliability * **Custom Geometries:** Capability to produce complex shapes * **Industry Compliance:** Meets major international standards * **Proven Performance:** Extensive track record in critical applications * **Quality Assurance:** Comprehensive testing and certification * **Technical Support:** Engineering expertise for optimal design Alloy 925 forgings provide the ultimate material solution for critical components requiring the highest levels of mechanical strength, corrosion resistance, and structural reliability in demanding oil & gas, chemical processing, aerospace, and power generation applications.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel 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 2010 gallon liquid totes Special package is available on request.