Alloy 800HT,Incoloy 800HT Sheet,N08811,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 Datasheet: Alloy 800HT / Incoloy 800HT Sheet (UNS N08811)** --- ### **1.0 Product Overview** **Alloy 800HT Sheet** (commercially known as **Incoloy 800HT Sheet**, UNS **N08811**) is a high-performance nickel-iron-chromium superalloy sheet product specifically engineered for extreme temperature applications requiring excellent formability and superior high-temperature properties. With enhanced chemistry featuring controlled carbon content (0.06–0.10%) and elevated aluminum+titanium (Al + Ti ≥ 1.20%), this alloy delivers exceptional creep rupture strength and oxidation resistance at temperatures up to 815°C (1500°F). The sheet form is ideal for fabricating complex components in aggressive thermal environments. --- ### **2.0 Chemical Composition (wt%)** | Element | Content (ASTM B409/ASME SB-409) | Role | |---------|----------------------------------|------| | **Nickel (Ni)** | 30.0–35.0 | Austenitic matrix stability, oxidation/carburization resistance | | **Chromium (Cr)** | 19.0–23.0 | High-temperature oxidation and sulfidation resistance | | **Iron (Fe)** | ≥39.5 | Base element | | **Carbon (C)** | 0.06–0.10 | Enhanced carbide strengthening for creep resistance | | **Aluminum (Al)** | 0.25–0.60 | Forms stable protective oxide scale | | **Titanium (Ti)** | 0.25–0.60 | Stabilization and precipitation strengthening | | **Manganese (Mn)** | ≤1.50 | Improves hot workability | | **Silicon (Si)** | ≤1.00 | Enhances oxidation/carburization resistance | | **Sulfur (S)** | ≤0.015 | Minimized to avoid hot shortness | | **Copper (Cu)** | ≤0.75 | — | *Critical Requirement: Aluminum + Titanium ≥ 1.20% for UNS N08811* --- ### **3.0 Physical Properties** | Property | Metric Value | Imperial Value | Condition | |----------|--------------|----------------|-----------| | **Density** | 8.03 g/cm³ | 0.29 lb/in³ | RT | | **Melting Range** | 1354–1384°C | 2470–2520°F | — | | **Specific Heat** | 460 J/kg·K | 0.11 Btu/lb·°F | 21°C | | **Thermal Conductivity** | 15.6 W/m·K | 9.0 Btu·in/hr·ft²·°F | 21°C | | **Thermal Expansion** | 16.6 × 10⁻⁶ /K | 9.2 × 10⁻⁶ /°F | 20–650°C | | **Electrical Resistivity** | 116 μΩ·cm | 45.8 μΩ·in | 21°C | | **Modulus of Elasticity** | 201 GPa | 29.1 × 10⁶ psi | RT | | **Magnetic Permeability** | <1.05 | <1.05 | Essentially non-magnetic | --- ### **4.0 Mechanical Properties** **Room-Temperature Properties (Solution-Annealed Condition)** - **Tensile Strength:** 450–620 MPa (65–90 ksi) - **Yield Strength (0.2% Offset):** 170–380 MPa (25–55 ksi) - **Elongation:** 30–45% (in 2 inches) - **Hardness:** 70–90 HRB **Elevated Temperature Performance** - **Maximum Service Temperature:** 815°C (1500°F) continuous - **Creep Strength:** Superior stress rupture properties at 650–815°C - **Oxidation Resistance:** Excellent performance in cyclic thermal conditions --- ### **5.0 International Standards** | Standard Type | Standard Number | Description | |--------------|----------------|-------------| | **UNS** | N08811 | Unified Numbering System | | **ASTM** | B409 | Nickel-Iron-Chromium Alloy Plate, Sheet, and Strip | | **ASME** | SB-409 | Boiler and Pressure Vessel Code | | **EN/DIN** | 1.4959 | X8NiCrAlTi32-21 (Enhanced) | | **ISO** | 6207 | Nickel alloy wrought products | | **AMS** | 5870 | Aerospace Material Specification | --- ### **6.0 Product Specifications** **Available Sizes & Dimensions** - **Thickness Range:** 0.5 mm to 6.0 mm (0.020" to 0.250") - **Standard Widths:** 600 mm, 1000 mm, 1219 mm, 1500 mm (24", 39", 48", 59") - **Standard Lengths:** 2000 mm, 2438 mm, 3000 mm (79", 96", 118") - **Custom Sizes:** Available upon request **Tolerances** - **Thickness:** ±5% standard, ±3% precision available - **Width/Length:** ±3 mm standard - **Flatness:** 3 mm per meter maximum - **Cambers:** 1 mm per meter maximum --- ### **7.0 Applications** **Thermal Processing Equipment** - Heat treatment furnace linings - Radiant heat shields - Muffle furnace components - Annealing covers and fixtures **Aerospace & Defense** - Combustion chamber liners - Afterburner components - Thermal protection systems - Exhaust system components **Power Generation** - Heat exchanger surfaces - Turbine shroud segments - Combustion liner parts - High-temperature gaskets **Chemical Processing** - Reactor linings - Distillation column internals - High-temperature filter elements - Process vessel cladding **Industrial Manufacturing** - High-temperature conveyor belts - Sintering trays - Brazing fixtures - Thermal processing fixtures --- ### **8.0 Fabrication Characteristics** **Forming Operations** - **Cold Forming:** Excellent characteristics in annealed condition - **Deep Drawing:** Good ductility for complex shapes - **Stretch Forming:** Suitable for aerospace applications - **Minimum Bend Radius:** 1.5t (annealed), 2.5t (as-rolled) **Welding** - **Recommended Processes:** GTAW, GMAW, Laser welding - **Filler Metal:** ERNiCrFe-8 for matching properties - **Preheat:** Not required - **Post-Weld Heat Treatment:** Solution anneal at 1120–1170°C **Machining** - **Machinability:** 25% compared to B1112 steel - **Tool Selection:** Carbide tools recommended - **Cutting Parameters:** Moderate speeds with consistent feed rates - **Coolants:** Required for heavy machining --- ### **9.0 Quality Assurance** **Testing & Certification** - Mill Test Certificate 3.1 per EN 10204 - Chemical analysis certification - Mechanical properties verification - Surface quality inspection **Surface Finishes** - **2B Finish:** Standard cold-rolled finish - **BA Finish:** Bright annealed surface - **No. 4 Finish:** Brushed finish available - **Polished:** Special order **Special Testing Available** - High-temperature property verification - Grain size determination - Non-destructive testing - Corrosion testing per ASTM standards --- ### **10.0 Advantages** - **Superior High-Temperature Strength:** Enhanced creep resistance compared to standard 800H - **Excellent Formability:** Suitable for complex fabrication operations - **Outstanding Oxidation Resistance:** Superior performance in oxidizing atmospheres - **Microstructural Stability:** Resists embrittlement and sigma phase formation - **Code Compliance:** Meets ASME, ASTM, and aerospace standards --- ### **11.0 Storage & Handling** - Store in clean, dry conditions - Protect surface finish during handling - Maintain proper identification and traceability - Stack properly to prevent deformation --- **Contact Information** For technical specifications, pricing, or custom sheet requirements, please contact 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 1916 gallon liquid totes Special package is available on request.