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

British Specs:，American Specs:，German Specs:

### **Product Datasheet: Alloy 925 / Incoloy 925 Sheet (UNS N09925)** **Alloy 925** (commercially known as **Incoloy 925**) sheet is a precipitation-hardenable nickel-iron-chromium alloy supplied in thin, flat form, offering an exceptional combination of corrosion resistance and mechanical strength. This product form is specifically engineered for applications requiring lightweight, formable components that must withstand aggressive environments while maintaining structural integrity. --- #### **1. Chemical Composition** The chemical composition of Alloy 925 sheet 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 capability 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 sheet exhibits consistent physical properties across all gauges: | 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) | | **Electrical Resistivity** | 1.12 μΩ·m | | **Magnetic Permeability** | <1.005 (essentially non-magnetic) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Aged Condition per ASTM B424):** | Property | Value | |:---|:---| | **Tensile Strength** | 965 MPa (140 ksi) min | | **Yield Strength (0.2% Offset)** | 760 MPa (110 ksi) min | | **Elongation** | 15% min | | **Hardness** | 241 - 302 HB | **Properties by Thickness Range:** | Thickness | Tensile Strength | Yield Strength | Elongation | |:---|:---|:---|:---| | **0.5-3mm** | 930-1100 MPa | 710-890 MPa | 18-25% | | **3-6mm** | 965-1140 MPa | 760-930 MPa | 16-22% | | **6-12mm** | 965-1170 MPa | 760-965 MPa | 15-20% | --- #### **4. Product Specifications** **Available Forms & Sizes:** - **Thickness:** 0.5mm to 12mm (0.020" to 0.472") - **Width:** 600mm to 2000mm (24" to 78") - **Length:** 1000mm to 6000mm (39" to 236") - **Temper Conditions:** Annealed, 1/4 Hard, 1/2 Hard, Full Hard **Surface Finishes:** - **No. 1:** Hot rolled, annealed, and pickled - **No. 2D:** Cold rolled, dull finish - **No. 2B:** Cold rolled, bright finish - **BA:** Bright annealed - **Polished:** Various grit finishes available --- #### **5. Product Applications** **Chemical Processing Equipment:** - **Tank Linings:** For corrosive chemical storage - **Reactor Jackets:** Temperature control surfaces - **Ductwork:** For corrosive fume handling - **Cover Plates:** For vessels and equipment **Oil & Gas Industry:** - **Pressure Vessel Cladding:** Corrosion-resistant layers - **Flow Meter Plates:** In sour gas service - **Seal Plates:** For wellhead equipment - **Baffle Plates:** In separators and scrubbers **Marine & Offshore:** - **Seawater System Components:** Pump covers, housing plates - **Deck Plating:** In corrosive marine environments - **Equipment Enclosures:** For electronic systems - **Structural Liners:** For ballast tanks and voids **Aerospace & Defense:** - **Engine Components:** Heat shields and covers - **Structural Parts:** In corrosive environments - **Electronic Housings:** For avionics systems - **Military Vehicle Components:** Armor and structural elements --- #### **6. International Standards** **Material Standards:** - **UNS N09925**: Unified Numbering System designation - **ASTM B424**: Standard for Plate, Sheet, and Strip - **ASME SB424**: 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 6ACRA**: Corrosion-resistant alloy applications - **ASME Section VIII**: Pressure vessel construction - **ASTM A480**: General Requirements for Flat-Rolled Stainless Steel **Quality Standards:** - **ASTM E290**: Bend Testing for Ductility - **ASTM E517**: Plastic Strain Ratio (r-value) - **ASTM E646**: Tensile Strain-Hardening Exponents (n-values) - **EN 10204 3.1/3.2**: Material certification --- #### **7. 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 (ASTM G48):** >85°C - **Critical Crevice Temperature:** >65°C - **NACE TM0177:** Compliant for Method A testing - **General Corrosion Rate:** <0.1 mm/year in most chemical environments --- #### **8. Fabrication Characteristics** **Forming Operations:** - **Bending:** Minimum bend radius 2 × thickness for 90° bends - **Deep Drawing:** Excellent in annealed condition - **Stretch Forming:** Suitable for complex shapes - **Spinning:** Good formability for symmetrical parts **Machining:** - **Machinability Rating:** 25-35% (compared to 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Speeds:** 20-30 m/min for milling operations - **Feed Rates:** Moderate with positive rake angles **Welding:** - **Recommended Processes:** GTAW, GMAW, Laser - **Filler Metals:** ERNiFeCr-1 or equivalent - **Preheat:** Not normally required - **Post-Weld Heat Treatment:** Recommended for critical applications --- #### **9. Heat Treatment** **Standard Heat Treatment:** 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 Considerations for Sheet:** - **Flatness Control:** Critical during heat treatment - **Surface Protection:** To prevent oxidation during processing - **Quenching Rate:** Important for maintaining corrosion resistance --- #### **10. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness, bend tests - **Surface Inspection:** Visual and dimensional checks - **Non-Destructive Testing:** PT, UT as specified - **Flatness Measurement:** To specified tolerances **Dimensional Tolerances:** - **Thickness:** ±5% or ±0.05mm, whichever is greater - **Width/Length:** ±1mm to ±5mm depending on size - **Flatness:** 3mm per meter maximum - **Squareness:** 1mm per 100mm maximum --- #### **11. Key Advantages** * **Excellent Formability:** Can be deeply drawn and formed into complex shapes * **Superior Corrosion Resistance:** Outstanding performance in aggressive environments * **High Strength-to-Weight Ratio:** Ideal for weight-sensitive applications * **Age-Hardenable:** Can be heat treated for optimal properties * **Good Weldability:** Suitable for various welding processes * **Surface Quality:** Available in multiple finishes for different applications * **Industry Compliance:** Meets major international standards Alloy 925 sheet provides designers and manufacturers with a versatile, high-performance material solution for applications requiring excellent corrosion resistance, good formability, and high mechanical strength in demanding industrial environments.

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 2007 gallon liquid totes Special package is available on request.