Alloy S,Hastelloy S Pipe,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) Pipe** **Overview** Alloy S Pipe, commercially known as Hastelloy® S Pipe and standardized as UNS N06635, represents a nickel-chromium-molybdenum wrought superalloy specifically engineered for high-temperature piping systems requiring exceptional oxidation resistance, thermal stability, and structural integrity. This pipe product form is designed to handle aggressive media and extreme thermal conditions in various industrial applications, maintaining reliable performance at temperatures up to 1200°C (2200°F). **Key Characteristics of Alloy S Pipe** * **Superior High-Temperature Capability**: Maintains excellent mechanical strength and creep resistance under sustained exposure to elevated temperatures * **Exceptional Oxidation Resistance**: Lanthanum-enhanced oxide layer provides outstanding protection against scaling and spallation during thermal cycling * **Excellent Thermal Stability**: Optimized chemistry prevents embrittlement and maintains ductility after prolonged high-temperature service * **Superior Corrosion Resistance**: Resists oxidizing atmospheres, sulfidizing environments, and carburizing conditions * **Good Weldability and Fabricability**: Can be readily welded, bent, and fabricated using standard techniques for high-performance nickel alloys --- **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) | --- **Mechanical Properties (Typical for Pipe 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 **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 Pipe is specified for critical high-temperature piping systems across multiple industries: **Industrial Thermal Processing:** * Radiant tubes and charge tubes in heat treatment furnaces * Recuperator and heat exchanger tubing * Thermocouple protection sheaths * Combustion system components **Chemical & Petrochemical Processing:** * High-temperature reactor transfer lines * Catalyst regeneration system piping * Pyrolysis gas lines * Waste gas incineration system ducting **Power Generation:** * Advanced power system heat exchangers * High-temperature instrumentation lines * Exhaust system components **Aerospace & Research:** * High-temperature test rig piping * Propulsion system components * Research reactor applications --- **International Standards for Pipe Products** | Standard Organization | Standard Number | Description | |---------------------|-----------------|-------------| | **ASTM International** | **ASTM B622** | Standard Specification for Seamless Nickel and Nickel Alloy Pipe | | **ASTM International** | **ASTM B619** | Standard for Welded Nickel and Nickel Alloy Pipe | | **ASTM International** | **ASTM B775/B776** | General Requirements for Nickel Alloy Pipe | | **ASME** | **ASME SB-622**
**ASME SB-619** | Code-approved versions for pressure component applications | | **ISO** | **ISO 6207** | Nickel alloy pipes for general purposes | | **DIN** | **DIN 17750** | Nickel and nickel alloy pipes - technical delivery conditions | | **UNS** | **UNS N06635** | Unified numbering system designation | **Available Pipe Specifications:** * **Types**: Seamless and welded construction * **Sizes**: Range from 1/8" NPS to 24" NPS * **Schedules**: Standard wall thickness schedules (SCH 5S to SCH XXS) * **Lengths**: Random and cut-to-length options * **End Types**: Plain end, beveled end, threaded end **Fabrication Notes:** * **Welding**: Compatible with GTAW, GMAW, SMAW processes using matching filler metals * **Forming**: Excellent cold forming characteristics * **Heat Treatment**: Solution annealed at 1177°C (2150°F) minimum, followed by rapid cooling **Disclaimer:** This technical information is provided for reference purposes only. Specific properties may vary depending on manufacturing process, heat treatment, and pipe 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 2888 gallon liquid totes Special package is available on request.