Alloy 625，Inconel 625 Fittings，UNS N06625，EFORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA21，American Specs:AMS 5581 Tube AMS 5599 Sheet, Strip and Plate AMS 5666 Bar, Forgings AMS 5869 Sheet, Strip and Plate AMS 5879 Sheet, Strip and Foil AMS 5837 Welding Wire ASTM F3056 Powder AMS 7001 Powder，German Specs:WS 2.4856, AFNOR NC22DNb

### **Product Introduction: Alloy 625 (Inconel 625) Fittings // UNS N06625** **Alloy 625** is a nickel-chromium-molybdenum superalloy renowned for its exceptional combination of high strength and outstanding corrosion resistance across a wide temperature range. The alloy's superior performance is derived from the solid-solution strengthening effect of molybdenum and niobium (columbium) within its nickel-chromium matrix. This unique chemistry allows Alloy 625 to perform exceptionally well in both corrosive environments and high-temperature applications up to 1800°F (980°C), without the need for precipitation hardening treatments. Supplied as **Pipe Fittings** and **Flanges**, these components are precision-engineered to provide reliable performance in critical piping systems handling aggressive media under high pressure and temperature. Commonly known by the trade name **Inconel® 625** and standardized as **UNS N06625**, these fittings ensure system integrity in the most demanding applications. --- #### **1. Key Characteristics** * **Exceptional Corrosion Resistance:** Superior resistance to pitting, crevice corrosion, and chloride-induced stress-corrosion cracking * **High-Temperature Strength:** Excellent mechanical properties maintained from cryogenic temperatures to 1800°F (980°C) * **Outstanding Oxidation Resistance:** Reliable performance in oxidizing atmospheres and scaling resistance * **Excellent Weldability:** Can be readily welded to similar and dissimilar metals using standard techniques * **Dimensional Stability:** Maintains shape and mechanical properties under thermal cycling and pressure fluctuations --- #### **2. Chemical Composition (Typical % Weight)** The composition conforms to major international standards for fittings and flanges. | Element | Content (%) | Element | Content (%) | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | ≥ 58 | **Molybdenum (Mo)** | 8.0 - 10.0 | | **Chromium (Cr)** | 20.0 - 23.0 | **Niobium (Nb) + Tantalum (Ta)** | 3.15 - 4.15 | | **Iron (Fe)** | ≤ 5.0 | **Titanium (Ti)** | ≤ 0.40 | | **Manganese (Mn)**| ≤ 0.50 | **Aluminum (Al)** | ≤ 0.40 | | **Carbon (C)** | ≤ 0.10 | **Silicon (Si)** | ≤ 0.50 | | **Phosphorus (P)**| ≤ 0.015 | **Sulfur (S)** | ≤ 0.015 | --- #### **3. Physical Properties** | Property | English Units | Metric Units | | :--- | :--- | :--- | | **Density** | 0.305 lb/in³ | 8.44 g/cm³ | | **Melting Point** | 2350 - 2460 °F | 1290 - 1350 °C | | **Specific Heat** | 0.094 Btu/lb·°F (70°F) | 394 J/kg·K (21°C) | | **Thermal Conductivity** | 6.0 Btu·in/hr·ft²·°F (70°F) | 8.7 W/m·K (21°C) | | **Thermal Expansion** | 7.1 x 10⁻⁶ in/in/°F (70-600°F) | 12.8 μm/m·K (21-316°C) | | **Modulus of Elasticity** | 30.0 x 10⁶ psi | 207 GPa | --- #### **4. International Standards** Alloy 625 fittings and flanges are manufactured to meet these key international standards: | Product Type | Standard Specification | Description | | :--- | :--- | :--- | | **Butt-Weld Fittings** | **ASTM B366** | Factory-Made Wrought Nickel Alloy Fittings | | **Socket-Weld & Threaded** | **MSS SP-43** | Wrought Stainless Steel Fittings | | **Flanges** | **ASTM B564** | Nickel Alloy Forgings | | **Europe** | **EN 10269 / DIN 2.4856** | | | **Japan** | **JIS NW6625** | | | **Unified Numbering System** | **UNS N06625** | | --- #### **5. Product Applications** **Oil & Gas Industry:** * Subsea pipeline connectors and elbows * Christmas tree and wellhead components * Flowline tees and reducers * Chemical injection system fittings **Chemical Processing:** * Reactor nozzle connections * Heat exchanger inlet/outlet fittings * Corrosive chemical transfer line components * Distillation column connections **Power Generation:** * Boiler feedwater system fittings * Steam turbine bypass components * Flue gas desulfurization system connectors * Nuclear reactor coolant system fittings **Aerospace & Defense:** * Hydraulic system connectors * Fuel system fittings and adapters * Engine test stand piping components **Marine & Offshore:** * Seawater cooling system elbows and tees * Ballast system connectors * Exhaust system expansion joints --- #### **6. Available Fitting Types** * **Butt-Weld Fittings:** - Elbows (45°, 90°, 180°) - Tees (Equal & Reducing) - Reducers (Concentric & Eccentric) - Caps and Stub Ends * **Socket-Weld Fittings:** - Unions - Elbows - Tees - Couplings * **Threaded Fittings:** - NPT Threaded Connectors - Couplings - Adapters * **Flanges:** - Weld Neck - Slip-On - Blind - Socket Weld - Lap Joint **Pressure Ratings:** Available in Schedule 5S through XXS, and Class 150 through 2500 **Quality Assurance:** All fittings are supplied with full traceability and certification to applicable standards, including chemical and mechanical test reports. **Note:** *Inconel® is a registered trademark of Special Metals Corporation. The information provided is for reference purposes. Material properties and performance can vary based on manufacturing process and heat treatment. For critical applications, always consult the relevant material data sheet and our technical team.*

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 1762 gallon liquid totes Special package is available on request.