Alloy S,Hastelloy S Plate,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) Plate** **Overview** Alloy S Plate, commercially known as Hastelloy® S Plate and standardized as UNS N06635, is a nickel-chromium-molybdenum wrought superalloy supplied in plate form, specifically engineered for high-temperature structural applications requiring exceptional oxidation resistance, thermal stability, and mechanical strength. This product form serves as fundamental material for fabricating components that must withstand severe thermal cycling, oxidizing atmospheres, and corrosive environments at temperatures up to 1200°C (2200°F). **Key Characteristics of Alloy S Plate** * **Exceptional High-Temperature Strength**: Maintains excellent mechanical properties and creep resistance under sustained thermal exposure * **Superior Oxidation Resistance**: Lanthanum-stabilized oxide layer provides exceptional protection against scaling and spallation during thermal cycling * **Outstanding Thermal Stability**: Optimized chemistry prevents embrittlement from sigma phase formation during prolonged high-temperature service * **Excellent Fabricability**: Can be readily sheared, formed, and welded using standard techniques for high-performance nickel alloys * **Good Thermal Fatigue Resistance**: Withstands repeated thermal cycling without significant degradation --- **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 Plate 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 * **Reduction of Area**: 45% minimum **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 Plate is specified for critical high-temperature structural applications across multiple industries: **Industrial Thermal Processing:** * Furnace baffles and internal components * Heat treatment fixtures and trays * Retorts and muffles for atmosphere processing * Radiant tube supports and hangers * Sintering furnace components **Aerospace & Defense:** * Combustion chamber components * Afterburner parts * Exhaust system structures * High-temperature support brackets **Chemical & Petrochemical Processing:** * Reactor vessel liners * High-temperature vessel fabrication * Catalyst support structures * Waste incineration system components **Power Generation:** * Heat shield components * Combustion system parts * High-temperature ducting * Advanced power system structures --- **International Standards for Plate 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 Plate Specifications:** * **Thickness**: 5mm to 100mm (0.187" to 4") * **Widths**: Up to 1500mm (60") * **Lengths**: Up to 6000mm (240") * **Surface Condition**: Hot rolled, annealed, and pickled or surface ground * **Heat Treatment**: Solution annealed condition **Fabrication Notes:** * **Welding**: Compatible with GTAW, GMAW, SMAW processes using matching filler metals * **Forming**: Good cold and hot forming characteristics * **Machining**: Can be machined using techniques for high-strength nickel alloys * **Heat Treatment**: Solution annealed at 1177°C (2150°F) minimum with rapid cooling **Disclaimer:** This technical information is provided for reference purposes only. Specific properties may vary depending on manufacturing process, heat treatment, and plate 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 2890 gallon liquid totes Special package is available on request.