Alloy 800HT,Incoloy 800HT Wire,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 Wire (UNS N08811)** --- ### **1.0 Product Overview** **Alloy 800HT Wire** (commercially known as **Incoloy 800HT Wire**, UNS **N08811**) is a high-performance nickel-iron-chromium superalloy wire product engineered for extreme temperature applications requiring exceptional creep resistance, oxidation stability, and fabricability. With enhanced chemistry featuring controlled carbon content (0.06–0.10%) and elevated aluminum+titanium (Al + Ti ≥ 1.20%), this alloy delivers superior performance at temperatures up to 815°C (1500°F). Available in spools, coils, or straight lengths, this wire is ideal for welding, weaving, fasteners, and structural components in demanding thermal environments. --- ### **2.0 Chemical Composition (wt%)** | Element | Content (ASTM B408/ASME SB-408) | 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 (Annealed Condition)** - **Tensile Strength:** 450–620 MPa (65–90 ksi) - **Yield Strength (0.2% Offset):** 170–380 MPa (25–55 ksi) - **Elongation:** 30–40% (in 50 mm) - **Reduction of Area:** 40–50% - **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** | B408 | Nickel-Iron-Chromium Alloy Rod and Bar | | **AWS** | A5.14 | ERNiCrFe-8 (Welding Wire Specification) | | **ASME** | SB-408 | Boiler and Pressure Vessel Code | | **EN/DIN** | 1.4959 | X8NiCrAlTi32-21 | | **ISO** | 6207 | Nickel alloy wrought products | --- ### **6.0 Product Specifications** **Wire Types Available** - **Welding Wire:** ERNiCrFe-8 classification - **Fabrication Wire:** For weaving and forming - **Fastener Wire:** For high-temperature bolts and studs - **Specialty Wire:** Custom compositions and coatings **Diameter Ranges** - **Fine Wire:** 0.5–2.0 mm (0.020–0.080") - **Medium Wire:** 2.0–6.0 mm (0.080–0.250") - **Heavy Wire:** 6.0–12.0 mm (0.250–0.500") **Surface Conditions** - **Bright Finish:** Plain surface - **Annealed & Descaled:** Clean, scale-free surface - **Coated:** Copper-coated for improved welding - **Special:** Custom surface treatments available --- ### **7.0 Applications** **Welding & Fabrication** - Cladding and overlay of carbon steel components - Repair of alloy 800HT/800H equipment - Fabrication of reformer tubes and furnace parts - Nuclear component welding and repair **Industrial Manufacturing** - High-temperature mesh and weaving - Fasteners (bolts, nuts, pins, studs) - Heating element support wires - Thermocouple attachment wires **Nuclear & Power Generation** - Core component fasteners - Heat exchanger wiring - Instrumentation and sensor mounts - Control rod drive components **Chemical Processing** - Catalyst support grids - High-temperature filter elements - Reactor internals and brackets - Distillation column packing --- ### **8.0 Fabrication Characteristics** **Welding Performance** - **Recommended Processes:** GTAW, GMAW, SAW - **Filler Metal Classification:** ERNiCrFe-8 - **Preheat:** Not required for most applications - **Interpass Temperature:** 150°C maximum - **Post-Weld Heat Treatment:** Solution anneal at 1120–1170°C **Forming & Drawing** - **Cold Working:** Excellent ductility in annealed condition - **Wire Drawing:** Multiple passes with intermediate annealing - **Springback:** Controlled in tempered conditions - **Bend Radius:** 2× diameter minimum **Heat Treatment** - **Solution Annealing:** 1120–1170°C (2050–2140°F) - **Stress Relieving:** 870–900°C (1600–1650°F) - **Atmosphere Control:** Bright annealing available --- ### **9.0 Quality Assurance** **Testing & Certification** - Mill Test Certificate 3.1 per EN 10204 - Chemical analysis for each melt heat - Mechanical testing per heat treatment lot - Surface quality inspection **Dimensional Standards** - **Diameter Tolerances:** ±0.05 mm for precision grades - **Ovality:** 0.5% of nominal diameter maximum - **Surface Defects:** Free from seams and cracks - **Spooling:** Even and tension-controlled **Special Testing Available** - High-temperature tensile testing - Creep and stress rupture testing - Corrosion testing per ASTM standards - Weldability testing and certification --- ### **10.0 Packaging & Identification** **Standard Packaging** - **Spools:** 5–250 kg capacity - **Coils:** 50–1000 kg, protected wrapping - **Straight Lengths:** 3–6 meters, bundled - **Special Packaging:** Custom requirements accommodated **Identification & Traceability** - Heat number identification - Continuous color coding available - Lot number traceability - Certification with each shipment --- ### **11.0 Advantages over Standard 800H Wire** - **Enhanced Creep Resistance:** Superior stress rupture properties at high temperatures - **Improved Oxidation Resistance:** Higher Al+Ti content provides better scale formation - **Superior Weldability:** Optimized chemistry for consistent welding performance - **Better Microstructural Stability:** Resists embrittlement in long-term service - **Extended Service Life:** Proven reliability in critical applications --- ### **12.0 Storage & Handling Recommendations** - Store in clean, dry conditions - Protect from contamination and moisture - Use proper handling equipment to prevent damage - Maintain identification and traceability - First-in-first-out inventory management --- **Contact Information** For technical specifications, pricing, or custom wire 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 1922 gallon liquid totes Special package is available on request.