Alloy S,Hastelloy S Sheet,UNS N06635,E FORU

British Specs:，American Specs: AMS 5711 Bar and Forging AMS 5838 Welding Wire AMS 5873 Sheet, Strip and Plate，German Specs:

**Technical Datasheet: Alloy S (UNS N06635) Sheet** **Overview** Alloy S Sheet, commercially known as Hastelloy® S Sheet and standardized as UNS N06635, is a nickel-chromium-molybdenum wrought superalloy supplied in thin sheet form, specifically engineered for applications requiring exceptional oxidation resistance, thermal stability, and fabricability in high-temperature environments. This product form is particularly valuable for manufacturing components where weight savings, complex forming, and superior surface finish are critical requirements at temperatures up to 1200°C (2200°F). **Key Characteristics of Alloy S Sheet** * **Excellent High-Temperature Performance**: Maintains mechanical integrity and resists deformation under sustained thermal exposure * **Superior Oxidation Resistance**: Lanthanum-enhanced oxide scale provides exceptional spallation resistance during repeated thermal cycling * **Outstanding Thermal Stability**: Optimized chemistry prevents embrittlement and maintains ductility after prolonged high-temperature service * **Excellent Fabricability**: Can be readily deep drawn, stamped, and formed into complex shapes using standard techniques * **Good Weldability**: Compatible with common welding processes without significant loss of corrosion resistance --- **Chemical Composition (Weight % Typical)** | Element | Percentage (%) | Primary Function | |---------|----------------|------------------| | **Nickel (Ni)** | Balance (~67%) | Austenitic matrix foundation providing thermal stability | | **Chromium (Cr)** | 14.0 - 16.0% | Primary oxidation and sulfidation resistance | | **Molybdenum (Mo)** | 14.0 - 16.0% | Solid solution strengthening and reducing environment resistance | | **Iron (Fe)** | 3.0% max | Residual element control | | **Tungsten (W)** | 1.0% max | Enhanced solid solution strengthening | | **Cobalt (Co)** | 2.0% max | Controlled residual element | | **Manganese (Mn)** | 0.50% max | Hot workability enhancement | | **Silicon (Si)** | 0.40% max | Oxidation resistance improvement | | **Lanthanum (La)** | 0.02% min | **Critical element** for oxide scale adhesion under thermal cycling | | **Carbon (C)** | 0.015% max | Minimized to prevent detrimental carbide formation | | **Boron (B)** | 0.010% max | Creep ductility enhancement | *Note: "Hastelloy" is a registered trademark of Haynes International Inc.* --- **Physical Properties (Typical - Annealed Condition)** | Property | Value | |----------|-------| | **Density** | 8.86 g/cm³ (0.320 lb/in³) | | **Melting Range** | 1335 - 1380°C (2435 - 2520°F) | | **Thermal Conductivity** | 11.0 W/m·K (at 20°C) | | **Mean Coefficient of Thermal Expansion** | 12.8 μm/m·°C (20-100°C) | | **Modulus of Elasticity** | 211 GPa (30.6 x 10⁶ psi) | | **Specific Heat Capacity** | 427 J/kg·K (at 20°C) | | **Thermal Diffusivity** | 3.2 mm²/s (at 20°C) | --- **Mechanical Properties (Typical for Sheet Product)** **Room Temperature (Annealed Condition):** * **Tensile Strength**: 795 MPa (115 ksi) minimum * **Yield Strength (0.2% Offset)**: 345 MPa (50 ksi) minimum * **Elongation**: 35% minimum * **Hardness**: Rb 90 maximum **Elevated Temperature Performance (980°C / 1800°F):** * **Stress-Rupture Strength**: Superior long-term stress rupture life * **Creep Resistance**: Excellent resistance to deformation under sustained load * **Thermal Fatigue Resistance**: Outstanding performance under cyclic thermal conditions --- **Product Applications** Alloy S Sheet is specified for critical high-temperature applications requiring thin gauges and complex geometries: **Industrial Thermal Processing:** * Heat treatment furnace linings and internal shrouds * Thermal baffles and heat shields * Sintering trays and furnace belts * Retort liners and protective covers * Annealing covers and atmosphere curtains **Aerospace & Defense:** * Combustion chamber liners and seals * Jet engine thermal protection systems * Exhaust system components and heat shields * Rocket motor components **Chemical & Petrochemical Processing:** * Vessel linings and cladding * Expansion bellows for high-temperature service * Catalyst support components * High-temperature gaskets and seals **Power Generation:** * Heat shield components in gas turbines * Combustion system liners * High-temperature ducting and transitions * Thermal protection systems --- **International Standards for Sheet Products** | Standard Organization | Standard Number | Description | |---------------------|-----------------|-------------| | **ASTM International** | **ASTM B575** | Standard Specification for Low-Carbon Nickel-Molybdenum-Chromium, Nickel-Chromium-Iron, Nickel-Chromium-Cobalt-Molybdenum, Nickel-Iron-Chromium-Tungsten, and Nickel-Chromium-Molybdenum-Tungsten Plate, Sheet, and Strip | | **ASME** | **ASME SB-575** | Code-approved version for pressure vessel applications | | **SAE International** | **AMS 5790** | Sheet, Strip, and Plate, Corrosion and Heat-Resistant, Nickel Alloy 66Cr-15Mo-2W (UNS N06635) Consumable Electrode or Vacuum Induction Melted, Solution Heat Treated | | **ISO** | **ISO 6208** | Nickel and nickel alloy plate, sheet and strip | | **UNS** | **UNS N06635** | Unified numbering system designation | **Available Sheet Specifications:** * **Thickness**: 0.1mm to 5mm (0.004" to 0.187") * **Widths**: Up to 1200mm (48") * **Lengths**: Custom lengths up to 3000mm (120") * **Surface Finish**: Annealed and pickled, bright annealed, or cold rolled finish * **Heat Treatment**: Solution annealed condition **Fabrication Notes:** * **Forming**: Excellent deep drawing and stamping characteristics * **Welding**: Compatible with GTAW and GMAW processes using matching filler metals * **Shearing**: Can be sheared and blanked using standard equipment * **Heat Treatment**: Solution annealed at 1177°C (2150°F) minimum with rapid cooling * **Surface Treatment**: Can be polished, coated, or treated for specific applications **Disclaimer:** This technical information is provided for reference purposes only. Specific properties may vary depending on manufacturing process, heat treatment, and sheet dimensions. For critical applications, always consult the appropriate material standards and manufacturer's certified test reports. "Hastelloy" is a registered trademark of Haynes International.

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 2891 gallon liquid totes Special package is available on request.