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

British Specs:，American Specs:，German Specs:

### **Product Datasheet: Alloy 925 / Incoloy 925 Rod (UNS N09925)** **Alloy 925** (commercially known as **Incoloy 925**) rod is a precipitation-hardenable nickel-iron-chromium alloy supplied in rod and bar form. This product form is specifically engineered for machining critical components that require exceptional combination of high strength, excellent corrosion resistance, and superior performance in sour gas environments. The rod form is ideal for producing fasteners, valve stems, shafts, and other precision-machined parts for demanding industrial applications. --- #### **1. Chemical Composition** The chemical composition of Alloy 925 rod is precisely controlled to ensure consistent mechanical properties and corrosion resistance: | 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 optimal age-hardening response through gamma prime precipitation (Ti, Al) while maintaining excellent corrosion resistance in sour gas environments (Cr, Mo, Cu).* --- #### **2. Physical Properties** Alloy 925 rod exhibits consistent physical properties across all diameters: | Property | Value / Description | |:---|:---| | **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** | Essentially non-magnetic (<1.005) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Aged Condition per ASTM B425):** | 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 | **Typical Properties by Heat Treatment Condition:** | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |:---|:---|:---|:---| | **Solution Annealed** | 690 - 830 | 275 - 410 | 30 - 40 | | **Aged (Standard)** | 1035 - 1170 | 860 - 1035 | 15 - 25 | | **Double Aged** | 1170 - 1310 | 1035 - 1170 | 10 - 18 | --- #### **4. Product Applications** **Oil & Gas Industry:** - **Downhole Tools:** Mandrels, connectors, subs - **Valve Components:** Stems, trim parts, gates - **Fasteners:** High-strength bolts, studs, nuts for sour service - **Wellhead Equipment:** Hangers, seals, wear rings **Chemical Processing:** - **Mixer Shafts:** For corrosive media - **Pump Components:** Shafts, sleeves, impellers - **Reactor Parts:** Agitators, internal components - **Valve Trim:** For severe service applications **Marine & Offshore:** - **Propeller Shafts:** For corrosion resistance - **Subsea Components:** Actuator rods, hydraulic pistons - **Marine Fasteners:** Critical bolting applications **General Engineering:** - **High-Strength Fasteners:** For elevated temperature service - **Machined Components:** Bushings, bearings, sleeves - **Aerospace Components:** Engine parts, mounting hardware --- #### **5. International Standards** **Material Standards:** - **UNS N09925**: Unified Numbering System designation - **ASTM B425**: Standard Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy Rod and Bar - **ASTM B564**: Standard Specification for Nickel Alloy Forgings - **AMS 5895**: Aerospace Material Specification **Industry Specifications:** - **API 6ACRA**: For anti-corrosion alloy applications - **NACE MR0175/ISO 15156**: Suitable for sour service environments - **DNV**, **ABS**, **LR**: Marine and offshore approvals **Heat Treatment Specifications:** - **Solution Annealing:** 1095-1120°C (2000-2050°F) + rapid quench - **Aging Treatment:** 620-650°C (1150-1200°F) for 8-16 hours - **Double Aging:** Additional aging at 590-620°C for enhanced properties --- #### **6. Product Specifications** **Available Forms:** - **Round Rod:** Diameters 3mm to 300mm (0.125" to 12") - **Hexagonal Bar:** Across flats 6mm to 100mm - **Square Bar:** 6mm to 100mm - **Surface Finish:** Hot finished, cold drawn, turned, ground, or polished **Standard Dimensions & Tolerances:** - **Diameter Tolerance:** ±0.1mm to ±0.5mm depending on size and condition - **Straightness:** Typically 1mm per meter maximum - **Length:** Standard 3-6 meters, custom lengths available --- #### **7. Corrosion Resistance** **Excellent Performance In:** - Sour gas environments (H₂S containing) - Chloride-containing solutions - Acidic conditions (sulfuric, phosphoric acids) - Seawater and marine atmospheres - Stress corrosion cracking environments **Typical Corrosion Rates:** - **3% NaCl + H₂S:** <0.025 mm/year - **Acidified FeCl₃:** Resistant to pitting - **NACE TM0177 Method A:** Meets requirements for sour service --- #### **8. Machining & Processing** **Machining Characteristics:** - **Machinability Rating:** 25-35% (compared to 100% for 1212 steel) - **Recommended Tools:** Carbide or premium high-speed steel - **Cutting Speeds:** 15-25 m/min for turning operations - **Feed Rates:** Moderate with positive rake angles - **Coolant Requirements:** Essential for optimum tool life **Heat Treatment Guidelines:** 1. **Solution Treat:** 1095°C ±15°C, water quench 2. **Age Harden:** 650°C ±10°C for 8 hours, air cool 3. **Stress Relieve:** When required after heavy machining **Welding Considerations:** - **Processes:** GTAW, GMAW, SMAW - **Filler Metal:** ERNiFeCr-1 or equivalent - **Preheat:** Generally not required - **Post-Weld Heat Treatment:** Recommended for critical applications --- #### **9. Quality Assurance** **Testing & Certification:** - Chemical analysis certificate - Mechanical properties test report - Non-destructive testing (UT, MT, PT) as required - NACE compliance certification available - Third-party inspection acceptance Alloy 925 rod offers manufacturers a reliable, high-performance material solution for critical components operating in corrosive environments where both superior mechanical properties and exceptional corrosion resistance are essential requirements.

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 2002 gallon liquid totes Special package is available on request.