Alloy 625，Inconel 625 Pipe，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) Pipe & Tube // UNS N06625** **Alloy 625** is a nickel-chromium-molybdenum superalloy celebrated for its exceptional combination of high strength and outstanding corrosion resistance. Its superior performance is derived from the solid-solution strengthening effect of molybdenum and niobium within its nickel-chromium matrix. This unique chemistry allows Alloy 625 to perform exceptionally well in a vast range of temperatures, from cryogenic environments up to 1800°F (980°C). Supplied as **Pipe** and **Tubing** (seamless and welded), this material is the preferred choice for critical applications involving the transport of corrosive fluids and gases under high pressure and temperature. It is commonly known by the trade name **Inconel® 625** and is standardized as **UNS N06625**. --- #### **1. Key Characteristics** * **Superior Corrosion Resistance:** Excellent resistance to a wide array of corrosive media, including pitting, crevice corrosion, and stress-corrosion cracking, especially in chloride-containing environments. * **High-Temperature Strength:** Exceptional tensile, creep, and rupture strength at elevated temperatures due to its solid-solution strengthened structure. * **Oxidation Resistance:** Outstanding resistance to oxidation and scaling, making it ideal for high-temperature service. * **Excellent Fabricability & Weldability:** Can be readily fabricated and welded using standard techniques without becoming post-weld sensitization, maintaining its corrosion resistance in the weld heat-affected zone. --- #### **2. Chemical Composition (Typical % Weight)** The composition meets the requirements of major international pipe and tube standards. | 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 pipes and tubes are manufactured to meet the following key international standards: | Product Form | Standard Specification | Description | | :--- | :--- | :--- | | **Seamless Pipe & Tube** | **ASTM B444** | Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy Pipe and Tube | | **Welded Pipe & Tube** | **ASTM B705** | Standard Specification for Welded Nickel-Chromium-Molybdenum-Columbium Alloy Pipe & Tube | | **Pipe (General)** | **ASTM B829** | Standard Specification for Seamless and Welded Nickel Alloy Pipe | | **Europe** | **EN 10269 / DIN 2.4856** | | | **Japan** | **JIS NW6625** | | | **Unified Numbering System** | **UNS N06625** | | --- #### **5. Product Applications** Alloy 625 pipes and tubes are critical components in industries where failure is not an option. * **Oil & Gas (Upstream, Subsea):** * **Critical Service:** Flowlines, risers, and jumper systems for sour service (H₂S-containing) fields. * **Downhole Equipment:** Production tubing, casing, and instrumentation lines. * **Surface Equipment:** High-pressure wellhead components, manifolds, and choke valves. * **Chemical & Process Industries:** * **Reactor Coils & Transfer Lines:** For handling highly corrosive catalysts and intermediates. * **Heat Exchanger Tubes:** In condensers and heaters exposed to aggressive chemicals like nitric acid, phosphoric acid, and chlorides. * **Process Piping:** For the transport of acids, alkalis, and salt solutions. * **Aerospace & Defense:** * **Hydraulic Line Tubing:** For high-pressure fuel and hydraulic systems. * **Engine Ducting:** Exhaust and thrust reversal systems. * **Airframe Components:** High-strength, corrosion-resistant tubing for critical systems. * **Power Generation:** * **Nuclear Power:** Control rod drive mechanisms, core instrumentation, and reactor coolant system piping. * **Gas Turbines:** High-temperature fuel and hydraulic lines, and interconnecting tubing. * **Marine & Offshore:** * **Seawater Piping Systems:** For ballast, firewater, and cooling systems. * **Submarine Systems:** Hydraulic and instrumentation tubing. * **Pollution Control:** * **Flue Gas Desulfurization (FGD) Systems:** Ducting, dampers, and spray pipes handling corrosive scrubber environments. --- **Note:** *Inconel® is a registered trademark of Special Metals Corporation. The information provided is for reference purposes. Specific material properties and performance depend on size, form, and manufacturing process. For critical applications, always consult the relevant material data sheet and our technical sales 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 1757 gallon liquid totes Special package is available on request.