Alloy 800HT (Welding),Incoloy 800HT Strip,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 Welding Strip (UNS N08811)** --- ### **1.0 Product Overview** **Alloy 800HT Welding Strip** (commercially known as **Incoloy 800HT Welding Strip**, UNS **N08811**) is a precision-engineered nickel-iron-chromium superalloy in thin-strip form, specifically designed for high-temperature welding applications requiring exceptional dimensional accuracy and superior thermal stability. With enhanced chemistry featuring controlled carbon content (0.06–0.10%) and elevated aluminum+titanium (Al + Ti ≥ 1.20%), this welding strip delivers outstanding creep rupture strength and oxidation resistance at temperatures up to 815°C (1500°F). The strip product is ideal for automated welding processes and precision components in demanding thermal environments. --- ### **2.0 Chemical Composition (wt%)** | Element | Content (ASTM B409/ASME SB-409) | Role in Welding Applications | |---------|----------------------------------|-----------------------------| | **Nickel (Ni)** | 30.0–35.0 | Austenitic matrix stability, prevents hot cracking | | **Chromium (Cr)** | 19.0–23.0 | High-temperature oxidation resistance in HAZ | | **Iron (Fe)** | ≥39.5 | Base element, provides structural integrity | | **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, prevents sensitization | | **Manganese (Mn)** | ≤1.50 | Improves hot workability, sulfur control | | **Silicon (Si)** | ≤1.00 | Enhances oxidation resistance, weld fluidity | | **Sulfur (S)** | ≤0.015 | Minimized to prevent hot cracking | | **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** **Base Metal Properties (Annealed Condition)** - **Tensile Strength:** 450–620 MPa (65–90 ksi) - **Yield Strength (0.2% Offset):** 170–380 MPa (25–55 ksi) - **Elongation:** 35–45% - **Hardness:** 70–80 HRB **Weld Metal Properties (with ERNiCrFe-8)** - **Tensile Strength:** 550–650 MPa (80–94 ksi) - **Yield Strength:** 300–400 MPa (44–58 ksi) - **Elongation:** 30–40% --- ### **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 | | **AWS** | A5.14 | ERNiCrFe-8 (Bare Welding Electrodes) | | **EN/DIN** | 1.4959 | X8NiCrAlTi32-21 | | **ISO** | 18274 | Nickel alloy welding consumables | --- ### **6.0 Product Specifications** **Welding Strip Dimensions** - **Thickness:** 0.05–2.0 mm (0.002–0.080 inches) - **Width:** 20–600 mm (0.75–24 inches) - **Length:** Coils up to 4000 meters, cut lengths available **Tolerances for Welding Applications** - **Thickness:** ±0.005 mm for precision welding - **Width:** ±0.1 mm for automated welding systems - **Camber:** 1 mm per meter maximum - **Flatness:** 2 mm per meter maximum --- ### **7.0 Welding Applications** **Automated Welding Systems** - Strip cladding of carbon steel components - Automated overlay welding - Strip electrode submerged arc welding - Continuous strip GTAW welding **Precision Welding Applications** - Thin-section component welding - Precision joint welding in aerospace - Electronic component welding - Instrumentation and sensor welding **Specialized Welding Processes** - Electroslag strip cladding - Strip overlay for corrosion protection - Automated hardfacing applications - Continuous weld buildup --- ### **8.0 Welding Characteristics & Procedures** **Recommended Welding Processes** - **Strip Cladding:** SAW with strip electrode - **GTAW:** With strip filler metal - **Laser Welding:** With strip feedstock - **Electroslag Welding:** With consumable strip **Welding Parameters for Strip** | Process | Strip Width (mm) | Current (A) | Voltage (V) | |---------|------------------|-------------|-------------| | **Strip SAW** | 30–150 | 400–1200 | 28–40 | | **Strip GTAW** | 10–50 | 150–400 | 12–20 | | **Strip ESW** | 50–150 | 800–2000 | 35–50 | **Joint Designs for Strip Welding** - **Overlap Joints:** For cladding applications - **Butt Joints:** With strip insert - **Edge Joints:** For thin-section welding - **Fillet Joints:** With strip reinforcement --- ### **9.0 Quality Assurance for Welding** **Material Certification** - Mill Test Certificate 3.1 per EN 10204 - Chemical analysis certification - Mechanical properties verification - Dimensional compliance reports **Welding Procedure Qualification** - **PQR Requirements:** Per ASME Section IX - **WPS Development:** For strip welding processes - **NDT Methods:** UT, PT, RT as required - **Hardness Testing:** Across weld cross-section **Surface Conditions for Welding** - **2B Finish:** Standard cold-rolled finish - **BA Finish:** Bright annealed for critical applications - **Pickled Finish:** For optimal welding performance - **Special Coatings:** Temporary protective coatings --- ### **10.0 Advantages for Welding Applications** - **Consistent Quality:** Uniform properties throughout coil length - **High Deposition Rates:** Efficient for large area cladding - **Minimal Dilution:** Controlled weld metal composition - **Automation Ready:** Suitable for robotic welding systems - **Superior Weld Quality:** Excellent fusion and bead appearance --- ### **11.0 Storage & Handling** - Store in clean, dry conditions - Protect strip edges from damage - Maintain coil integrity during handling - Use proper uncoiling equipment --- **Contact Information** For welding procedure specifications, technical support, or strip product requirements, please contact our technical sales and engineering 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 1930 gallon liquid totes Special package is available on request.