# Alloy HR160 UNS N12160: High-Performance Nickel-Based Superalloy for Extreme Environments
Introduction to Alloy HR160
Alloy HR160 (UNS N12160) is a nickel-based superalloy specifically designed to withstand extreme environments characterized by high temperatures, corrosive atmospheres, and mechanical stress. Developed for applications in aggressive industrial settings, this alloy offers exceptional resistance to oxidation, carburization, and sulfidation, making it a preferred choice for demanding applications across various industries.
Chemical Composition and Properties
The superior performance of Alloy HR160 stems from its carefully balanced chemical composition:
- Nickel (Ni): 35-38% (base element)
- Chromium (Cr): 26-29%
- Iron (Fe): 15-18%
- Cobalt (Co): 2.5-3.5%
- Silicon (Si): 2.4-3.0%
- Other elements including tungsten, molybdenum, and rare earth additions
This unique composition provides:
- Excellent oxidation resistance up to 2200°F (1204°C)
- Superior resistance to carburizing and sulfidizing environments
- Good mechanical properties at elevated temperatures
- Outstanding thermal stability
Key Applications
Alloy HR160 finds extensive use in industries where conventional materials fail:
Petrochemical Industry
Used in ethylene pyrolysis furnace components, reformer tubes, and other high-temperature processing equipment exposed to carburizing and sulfidizing environments.
Power Generation
Applied in advanced power plants, particularly in components exposed to aggressive combustion atmospheres at elevated temperatures.
Heat Treatment Industry
Utilized for furnace fixtures, radiant tubes, and other components in carburizing and neutral hardening furnaces.
Chemical Processing
Employed in reactors, heat exchangers, and other equipment handling corrosive chemicals at high temperatures.
Fabrication and Welding
Alloy HR160 can be fabricated using standard techniques, though some considerations apply:
- Hot Working: Performed in the temperature range of 1800-2150°F (982-1177°C)
- Cold Working: Possible but requires intermediate annealing
- Welding: Can be welded using GTAW (TIG) and GMAW (MIG) processes with matching filler metal
- Machining: Requires slower speeds and heavier feeds compared to austenitic stainless steels
Keyword: Alloy HR160 UNS N12160
Advantages Over Other Alloys
Alloy HR160 offers several advantages compared to other high-temperature alloys:
| Property | HR160 Advantage |
|---|---|
| Oxidation Resistance | Superior to most nickel-chromium alloys at temperatures above 1800°F (982°C) |
| Carburization Resistance | Better than standard heat-resistant alloys in carb
|