Alloy 800H,Incoloy 800H Tube,N08810,E FORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA15，American Specs:AMS 5766 Bar and Forgings AMS 5871 Sheet, Strip and Plate ASTM B408 ASTM B564 ASTM A240 ASTM A480，German Specs:WS 1.4876 WS 1.4958 WS 1.4959

### **Product Introduction: Alloy 800H / Incoloy 800H Tube (UNS N08810)** **Alloy 800H Tube** (commercially known as **Incoloy 800H Tube** and designated as **UNS N08810**) represents the tubular product form of a nickel-iron-chromium superalloy specifically engineered for high-temperature service. As the controlled-composition version of Alloy 800, it features elevated carbon content and undergoes specific thermal treatment to develop a coarse grain structure essential for superior high-temperature performance. The "H" designation is particularly crucial for tubular products, indicating enhanced creep and stress-rupture properties that make Alloy 800H tubes indispensable in applications involving heat transfer, pressure containment, and fluid transport under extreme thermal conditions. These tubes are manufactured as either seamless or welded products, with seamless versions being preferred for most critical high-temperature and high-pressure applications. --- ### **Chemical Composition** The chemical composition of Alloy 800H Tube (N08810) is strictly controlled according to international standards to ensure consistent performance in demanding environments. | Element | Content (%) (Per ASTM B163/ASME SB-163) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | 30.0 - 35.0 | Provides austenitic structure and resistance to oxidation and carburization | | **Chromium (Cr)** | 19.0 - 23.0 | Confers resistance to oxidation and sulfidation | | **Iron (Fe)** | ≥ 39.5 | Balance element forming the alloy matrix | | **Carbon (C)** | 0.05 - 0.10 | **Critical for "H" grade** - enhances creep resistance | | **Aluminum (Al)** | 0.15 - 0.60 | Improves oxidation resistance | | **Titanium (Ti)** | 0.15 - 0.60 | Provides stabilization and strengthening | | **Manganese (Mn)** | ≤ 1.50 | Enhances hot workability | | **Copper (Cu)** | ≤ 0.75 | - | | **Silicon (Si)** | ≤ 1.00 | Improves oxidation resistance | | **Sulfur (S)** | ≤ 0.015 | Impurity control | *Note: The ratio of (Al + Ti) must be ≥ 0.85% for N08810 specification.* --- ### **Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 0.29 lb/in³ (8.03 g/cm³) | | **Melting Range** | 2470-2520°F (1354-1384°C) | | **Specific Heat** | 0.11 Btu/lb·°F (460 J/kg·K) at 70°F (21°C) | | **Thermal Expansion** | 9.2 x 10⁻⁶ /°F (16.6 x 10⁻⁶ /K) | 70-1200°F (20-650°C) | | **Thermal Conductivity** | 9.0 Btu/hr·ft·°F (15.6 W/m·K) at 70°F (21°C) | | **Electrical Resistivity** | 45.8 μΩ·in (116 μΩ·cm) at 70°F (21°C) | | **Modulus of Elasticity** | 29.1 x 10⁶ psi (201 GPa) at 70°F (21°C) | | **Magnetic Permeability** | Typically < 1.05 (Essentially non-magnetic) | --- ### **Mechanical Properties** Mechanical properties for tubing products are specified in standards such as ASTM B163 for seamless tubes. **ASTM B163 - Seamless Tubes (Annealed Condition)** * **Tensile Strength:** 65 ksi (450 MPa) minimum * **Yield Strength (0.2% Offset):** 25 ksi (170 MPa) minimum * **Elongation:** 30% minimum *The principal advantage of Alloy 800H tubes lies in their exceptional retention of mechanical properties at elevated temperatures, particularly creep and stress-rupture strength up to 1500°F (815°C).* --- ### **International Standards** Alloy 800H / N08810 tubing conforms to various international standards governing different applications and manufacturing processes. | Standard Type | Standard Number | Description | | :--- | :--- | :--- | | **UNS** | **N08810** | Unified Numbering System designation | | **ASTM** | **B163/B163M** | Seamless Condenser and Heat-Exchanger Tubes | | **ASTM** | **B407** | Seamless Pipe and Tube (General Service) | | **ASTM** | **B829** | Seamless and Welded Tubing (General Application) | | **ASME** | **SB-163** | ASME Boiler and Pressure Vessel Code Section I & VIII | | **ASME** | **SB-407** | ASME Code for Pipe and Tube | | **EN/DIN** | **1.4876** | Material Number X8NiCrAlTi32-21 | | **ISO** | **6207** | Nickel alloy seamless tubes for heat exchangers | --- ### **Product Applications** Alloy 800H tubes are specified for critical applications where reliability under high temperature and pressure is paramount: 1. **Heat Exchangers & Condensers:** * Shell and tube heat exchangers for high-temperature processes * Waste heat recovery systems * Feedwater heaters in power plants * Process gas coolers 2. **Petrochemical Industry:** * Ethylene cracking furnace tubes * Steam methane reformer exchanger tubes * Pyrolysis furnace tubes * Process heater tubes 3. **Power Generation:** * Superheater tubes in conventional power plants * Heat exchanger tubes in nuclear power systems * High-temperature gas-cooled reactor components * Steam generating tubes 4. **Industrial Furnace Systems:** * Radiant tubes in heat treatment furnaces * Annealing furnace tubes * Carburizing and nitriding retorts 5. **Chemical Processing:** * High-temperature reactor tubes * Catalyst carrier tubes * Process piping in corrosive environments --- ### **Key Characteristics Summary** * **Superior Creep Resistance:** Maintains structural integrity under prolonged exposure to high temperatures and pressures * **Excellent Oxidation Resistance:** Withstands temperatures up to 1800°F (980°C) in continuous service * **Outstanding Carburization Resistance:** Performs reliably in hydrocarbon-rich environments * **Good Sulfidation Resistance:** Suitable for sulfur-containing process streams * **Exceptional Thermal Stability:** Maintains properties during long-term thermal exposure * **Good Fabricability:** Can be bent, expanded, and welded using appropriate techniques * **Non-Magnetic Properties:** Suitable for specialized applications requiring non-magnetic materials Alloy 800H tubes are typically supplied in the annealed condition to optimize their high-temperature properties and facilitate subsequent fabrication operations such as bending and welding. ### **Quality Assurance** Tubing products are subject to rigorous quality control measures including: * Non-destructive testing (eddy current, ultrasonic) * Hydrostatic or pneumatic pressure testing * Dimensional verification * Metallurgical structure examination * Chemical analysis verification In conclusion, **Alloy 800H / Incoloy 800H Tube (UNS N08810)** represents a premium tubular product designed for the most demanding high-temperature applications where reliability, longevity, and performance under extreme conditions 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 1901 gallon liquid totes Special package is available on request.