Alloy 800H,Incoloy 800H Fittings,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

### **Technical Data Sheet: Alloy 800H / Incoloy 800H Fittings (UNS N08810)** --- #### **1.0 Product Overview** **Alloy 800H Fittings** (commercially known as **Incoloy 800H Fittings**, UNS **N08810**) are precision-engineered piping components manufactured from the nickel-iron-chromium superalloy specifically designed for high-temperature and corrosive service applications. The "H" designation indicates controlled chemistry with elevated carbon content (0.05-0.10%) and specific thermal processing to achieve optimal grain structure for enhanced creep and stress-rupture properties in pressurized systems. These fittings maintain the excellent high-temperature strength, oxidation resistance, and carburization resistance of Alloy 800H in pre-formed configurations, ensuring system integrity and reliability in demanding industrial environments. --- #### **2.0 Chemical Composition** | Element | Content (%) (Per ASTM B366/B564) | Function | |---------|-----------------------------------|----------| | **Nickel (Ni)** | 30.0 - 35.0 | Austenitic matrix formation, oxidation and carburization resistance | | **Chromium (Cr)** | 19.0 - 23.0 | High-temperature oxidation and sulfidation resistance | | **Iron (Fe)** | ≥ 39.5 | Balance element, provides alloy matrix | | **Carbon (C)** | 0.05 - 0.10 | **Key element for "H" grade** - enhances creep rupture strength | | **Aluminum (Al)** | 0.15 - 0.60 | Oxidation resistance through protective scale formation | | **Titanium (Ti)** | 0.15 - 0.60 | Stabilization and high-temperature strengthening | | **Manganese (Mn)** | ≤ 1.50 | Hot workability improvement | | **Copper (Cu)** | ≤ 0.75 | - | | **Silicon (Si)** | ≤ 1.00 | Enhances oxidation and carburization resistance | | **Sulfur (S)** | ≤ 0.015 | Impurity control | *Note: Aluminum + Titanium content ≥ 0.85% for N08810 specification* --- #### **3.0 Physical Properties** | Property | Metric Value | Imperial Value | Condition | |----------|--------------|----------------|-----------| | **Density** | 8.03 g/cm³ | 0.29 lb/in³ | At 20°C (68°F) | | **Melting Range** | 1354-1384°C | 2470-2520°F | - | | **Specific Heat** | 460 J/kg·K | 0.11 Btu/lb·°F | At 21°C (70°F) | | **Mean Coefficient of Thermal Expansion** | 16.6 × 10⁻⁶ /K | 9.2 × 10⁻⁶ /°F | 20-650°C (70-1200°F) | | **Thermal Conductivity** | 15.6 W/m·K | 9.0 Btu·in/hr·ft²·°F | At 21°C (70°F) | | **Electrical Resistivity** | 116 μΩ·cm | 45.8 μΩ·in | At 21°C (70°F) | | **Modulus of Elasticity** | 201 GPa | 29.1 × 10⁶ psi | At 21°C (70°F) | | **Magnetic Permeability** | < 1.05 | < 1.05 | Essentially non-magnetic | --- #### **4.0 Mechanical Properties** **ASTM B366/B564 - Fitting Specifications (Solution Annealed)** - **Tensile Strength:** 450 MPa min | 65 ksi min - **Yield Strength (0.2% Offset):** 170 MPa min | 25 ksi min - **Elongation:** 30% minimum **High-Temperature Design Properties** - **Maximum Operating Temperature:** 815°C (1500°F) continuous - **Creep Strength:** Excellent retention under sustained loading - **Stress Rupture:** Superior performance at elevated temperatures - **Pressure Ratings:** ASME B16.9, B16.11, B16.28 compliant --- #### **5.0 International Standards & Specifications** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **UNS** | **N08810** | Unified Numbering System | | **ASTM** | **B366** | Factory-Made Wrought Nickel Alloy Fittings | | **ASTM** | **B564** | Nickel Alloy Forgings | | **ASME** | **SB-366/SB-564** | ASME Boiler and Pressure Vessel Code | | **MSS** | **SP-43/SP-75** | Wrought Stainless Steel Fittings | | **ASME** | **B16.9/B16.11** | Steel Buttweld and Socket Weld Fittings | | **EN/DIN** | **1.4876** | Material Number X8NiCrAlTi32-21 | --- #### **6.0 Product Range & Types** **Butt-Weld Fittings (ASME B16.9)** - **Elbows:** 45°, 90°, 180° LR/SR - **Tees:** Straight, reducing - **Reducers:** Concentric, eccentric - **Caps:** End caps, hemispherical - **Stub Ends:** MSS SP-43 **Socket-Weld Fittings (ASME B16.11)** - **Socket Elbows:** 45°, 90° - **Socket Tees:** Straight - **Socket Couplings:** Hex, round - **Socket Caps:** End closures **Threaded Fittings (ASME B16.11)** - **Threaded Elbows:** 45°, 90° - **Threaded Tees:** Straight - **Threaded Couplings:** Hex, reducing - **Threaded Unions:** High-temperature service **Special Fittings** - **Forged Crosses:** Four-way connections - **Lap Joint Stub Ends:** For slip-on flanges - **Return Bends:** Heat exchanger applications - **Custom Fabrications:** Project-specific designs --- #### **7.0 Manufacturing Processes** **Forming Methods** - **Hot Forming:** 950-1200°C (1750-2200°F) - **Cold Forming:** With intermediate annealing - **Forging:** Hammer, press, and ring rolling - **Machining:** From bar or forged stock **Heat Treatment** - **Solution Annealing:** 980-1065°C (1800-1950°F) - **Quenching:** Water or rapid air cooling - **Stress Relieving:** For complex geometries **Quality Processes** - **NDT Testing:** PT, MT, RT, UT as required - **Dimensional Verification:** To ASME/ANSI standards - **Pressure Testing:** Hydrostatic/pneumatic testing - **Surface Inspection:** Visual and enhanced examination --- #### **8.0 Applications** **Petrochemical Industry** - Steam methane reformer systems - Ethylene cracking furnace piping - Hydrocarbon processing units - Reformer outlet manifolds and headers **Power Generation** - High-temperature steam piping - Heat recovery steam generators - Boiler feedwater systems - Nuclear power plant components **Chemical Processing** - Corrosive chemical handling - High-temperature reaction systems - Heat exchanger connections - Process interconnecting piping **Industrial Heating** - Thermal fluid systems - Heat treatment furnace piping - Radiant tube connections - Combustion system components **Oil & Gas** - Refinery process piping - High-temperature flow lines - Pressure vessel connections - Thermal recovery systems --- #### **9.0 Design & Selection Considerations** **Pressure-Temperature Ratings** - ASME B31.3 Process Piping compliant - Temperature-dependent derating factors - Creep consideration for temperatures above 540°C (1000°F) **Corrosion Allowance** - Minimum wall thickness requirements - Erosion/corrosion considerations - Service life calculations **Installation Requirements** - Welding procedures and qualifications - Preheating and PWHT requirements - Alignment and fit-up tolerances - Support and expansion considerations --- #### **10.0 Quality Assurance** **Certification & Documentation** - Mill Test Certificate 3.1 per EN 10204 - Material Test Reports with heat number traceability - Chemical and mechanical properties certification - NDT reports and compliance certificates **Testing & Inspection** - Chemical analysis verification - Mechanical testing: tensile, hardness, impact - Non-destructive examination per project requirements - Dimensional inspection to applicable standards - Surface finish and visual examination **Marking & Traceability** - Permanent marking per ASTM A961 - Heat number and material grade identification - Size, schedule, and pressure rating marking - Manufacturer's identification --- ### **Conclusion** **Alloy 800H / Incoloy 800H Fittings (UNS N08810)** provide reliable, high-performance connection solutions for critical high-temperature and corrosive service applications. Their controlled composition and specialized manufacturing ensure maintained system integrity under the most demanding operating conditions. With comprehensive standardization and rigorous quality control, these fittings deliver long-term reliability in petrochemical, power generation, and industrial processing applications where failure is not an option.

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 1905 gallon liquid totes Special package is available on request.