Alloy S,Hastelloy S Bar(Round bar, Flat bar),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) Bar - Round Bar & Flat Bar** **Overview** Alloy S Bar, commercially known as Hastelloy® S Bar and standardized as UNS N06635, is a nickel-chromium-molybdenum wrought superalloy supplied in both round bar and flat bar forms. This alloy is specifically engineered for exceptional high-temperature structural applications where superior oxidation resistance, thermal stability, and fabricability are required. The bar product form serves as essential stock material for machining components that must withstand severe thermal cycling, oxidizing, sulfidizing, and carburizing environments up to 1200°C (2200°F). **Key Characteristics of Alloy S Bar** * **Excellent High-Temperature Strength:** Maintains remarkable load-bearing capacity and creep-rupture properties under sustained exposure to elevated temperatures * **Superior Oxidation Resistance:** Lanthanum addition ensures exceptional oxide scale adhesion and spallation resistance during thermal cycling * **Outstanding Thermal Stability:** Low carbon content and balanced chemistry prevent embrittlement from sigma phase formation during prolonged high-temperature exposure * **Excellent Fabricability:** Both round and flat bars can be readily machined, forged, and welded using standard techniques for nickel-based alloys --- **Chemical Composition (Weight % Typical)** | Element | Percentage (%) | Primary Function | |---------|----------------|------------------| | **Nickel (Ni)** | Balance (~67%) | Base element providing austenitic structure and overall stability | | **Chromium (Cr)** | 14.0 - 16.0% | Primary resistance to oxidation and sulfidation | | **Molybdenum (Mo)** | 14.0 - 16.0% | Solid solution strengthening and resistance to reducing environments | | **Iron (Fe)** | 3.0% max | Residual element | | **Tungsten (W)** | 1.0% max | Solid solution strengthening contributor | | **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:** dramatically improves oxide scale adhesion under thermal cycling | | **Carbon (C)** | 0.015% max | Minimized to prevent harmful carbide precipitation | | **Boron (B)** | 0.010% max | Creep ductility improvement | *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 Point** | 1335 - 1380°C (2435 - 2520°F) | | **Thermal Conductivity** | 11.0 W/m·K (at 20°C) | | **Coefficient of Thermal Expansion** | 12.8 μm/m·°C (20-100°C) | | **Modulus of Elasticity (Tensile)** | 211 GPa (30.6 x 10⁶ psi) | | **Electrical Resistivity** | 1.30 μΩ·m | --- **Mechanical Properties (Typical for Bar Product)** **Room Temperature (Annealed Condition):** * **Tensile Strength:** 795 MPa (115 ksi) min * **Yield Strength (0.2% Offset):** 345 MPa (50 ksi) min * **Elongation:** 35% min **Elevated Temperature (980°C / 1800°F):** * **Stress-Rupture Strength:** Superior stress-rupture life compared to conventional chromia-forming alloys --- **Product Applications: Round Bar & Flat Bar** **Round Bar Applications:** * **Shafts and Spindles:** For high-temperature furnace equipment * **Valve Stems and Components:** In chemical processing systems * **Fasteners:** High-temperature bolts, studs, and nuts * **Machined Components:** Turbine seals, rings, and bushings * **Agitator Shafts:** For reactors in corrosive environments **Flat Bar Applications:** * **Structural Supports:** Brackets and hangers in furnace applications * **Wear Strips and Guides:** In high-temperature material handling systems * **Fabricated Frameworks:** For heat treatment fixtures and baskets * **Machined Base Plates:** For component assembly in aggressive environments * **Reinforcement Elements:** In high-temperature composite structures --- **International Standards for Bar Products** | Standard Organization | Standard Number | Description | |---------------------|-----------------|-------------| | **ASTM International** | **ASTM B335** | Standard Specification for Nickel-Molybdenum Alloy Rod and Bar | | **ASTM International** | **ASTM B572** | Standard Specification for UNS N06635 Rod | | **ASME** | **ASME SB-335**
**ASME SB-572** | Equivalent to ASTM standards for code-approved construction | | **SAE International** | **AMS 5772** | Bars, Forgings, and Rings, Corrosion and Heat-Resistant, Nickel Alloy 66Cr-15Mo-2W (UNS N06635) Consumable Electrode or Vacuum Induction Melted, Annealed | | **UNS** | **UNS N06635** | Universal designation for alloy composition | **Available Bar Forms:** * **Round Bar:** Diameters from 3mm to 300mm (0.125" to 12") * **Flat Bar:** Various thicknesses and widths to meet specific application requirements * **Surface Condition:** Hot finished, hot rolled, turned, ground, or polished * **Heat Treatment:** Solution annealed condition **Disclaimer:** This information is for reference purposes only. Material properties may vary based on heat treatment, manufacturing process, and specific bar dimensions. For critical applications, always consult the relevant 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 2887 gallon liquid totes Special package is available on request.