Alloy S,Hastelloy S Forgings,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) Forgings** **Overview** Alloy S Forgings, commercially known as Hastelloy® S Forgings and standardized as UNS N06635, represent premium-quality components manufactured through controlled forging processes from nickel-chromium-molybdenum superalloy. These forgings are specifically engineered to deliver superior mechanical properties, enhanced grain structure, and optimal performance in the most demanding high-temperature applications. The forging process ensures maximum material integrity, directional strength, and reliability for critical components operating at temperatures up to 1200°C (2200°F). **Key Characteristics of Alloy S Forgings** - **Enhanced Mechanical Properties**: Forging process refines grain structure, improving strength and fatigue resistance - **Superior Structural Integrity**: Directional grain flow provides optimal stress distribution - **Exceptional High-Temperature Capability**: Maintains mechanical properties under sustained thermal exposure - **Excellent Thermal Fatigue Resistance**: Withstands repeated thermal cycling without degradation - **Improved Density and Homogeneity**: Reduced porosity and uniform microstructure throughout the component --- **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 - Solution 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 Forgings)** **Room Temperature (Solution Annealed Condition):** - **Tensile Strength**: 795-895 MPa (115-130 ksi) - **Yield Strength (0.2% Offset)**: 345-415 MPa (50-60 ksi) - **Elongation**: 35-45% - **Reduction of Area**: 45-55% - **Hardness**: HB 170-210 **Elevated Temperature Performance (980°C / 1800°F):** - **Creep Rupture Strength**: Superior long-term performance - **Stress Rupture Life**: Excellent durability under sustained loading - **Thermal Fatigue Resistance**: Outstanding performance in cyclic conditions --- **Forging Process Capabilities** **Forging Methods:** - Open-die forging for large, simple shapes - Closed-die forging for complex, near-net shapes - Ring rolling for circular components - Press forging for uniform grain structure **Forging Temperature Range:** - **Heating Temperature**: 1150-1200°C (2100-2200°F) - **Forging Start Temperature**: 1050-1150°C (1920-2100°F) - **Forging Finish Temperature**: 950°C (1740°F) minimum **Heat Treatment:** - Solution annealing at 1177°C (2150°F) minimum - Rapid cooling to room temperature - Stress relieving available when required --- **Product Applications** Alloy S Forgings are specified for critical components requiring maximum reliability in extreme environments: **Aerospace & Defense:** - Turbine engine components - Combustion chamber parts - Afterburner components - Rocket motor parts - High-temperature fasteners **Industrial Thermal Processing:** - Furnace rolls and mandrels - Heat treatment fixtures - Retort supports and hangers - Radiant tube assemblies - Sintering furnace components **Power Generation:** - Gas turbine components - Heat exchanger parts - Valve bodies and stems - Turbine blades and vanes - High-temperature bolting **Chemical Processing:** - Reactor components - High-pressure vessel parts - Valve and pump bodies - Mixer shafts and impellers - High-temperature fasteners --- **International Standards for Forgings** | Standard Organization | Standard Number | Description | |---------------------|-----------------|-------------| | **ASTM International** | **ASTM B564** | Standard Specification for Nickel Alloy Forgings | | **ASME** | **ASME SB-564** | Code-approved version for pressure component applications | | **SAE International** | **AMS 5772** | Bars, Forgings, and Rings, Corrosion and Heat-Resistant, Nickel Alloy 66Cr-15Mo-2W (UNS N06635) | | **ASTM International** | **ASTM E572** | Test Method for X-Ray Emission Spectrometric Analysis | | **ASTM International** | **ASTM E354** | Test Methods for Chemical Analysis of High-Temperature Alloys | | **ISO** | **ISO 9724** | Forged nickel alloy components for high-temperature service | | **UNS** | **UNS N06635** | Unified numbering system designation | **Quality Assurance Requirements:** - **Chemical Analysis**: Verified by spectrometric analysis - **Mechanical Testing**: Tensile, hardness, and impact testing - **Macro Examination**: Etchant testing for grain flow - **Ultrasonic Testing**: Per ASTM A388 for internal quality - **Dimensional Verification**: To drawing specifications - **Certification**: Material Test Certificates per EN 10204 3.1/3.2 **Available Forging Forms:** - **Bars and Billets**: For subsequent machining - **Rings and Cylinders**: For pressure vessel applications - **Blanks and Blocks**: For custom component manufacture - **Near-Net Shapes**: Minimizing material waste and machining - **Custom Configurations**: Engineered to specific design requirements **Disclaimer:** This technical information is provided for reference purposes only. Specific properties and performance may vary depending on forging process parameters, heat treatment, and component design. For critical applications, always consult the appropriate material standards, design codes, 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 2894 gallon liquid totes Special package is available on request.