Principal Features
We are pleased to announce the development of HASTELLOY® WR-66™ alloy. This alloy offers excellent resistance to sliding wear and corrosion in aqueous corrosive media, superior to most Ni- and Co-based alloys in wrought form. In the weld overlay form, the alloy possesses corrosion resistance and ductility vastly superior to commonly used Cobalt-Chromium alloys such as alloy STELLITE® 6, while maintaining comparable resistance to sliding wear and galling. The alloy’s high ductility and ability to offer greater control of weld bead shape and thickness enables superior resistance to cracking during weld overlay deposition compared to other Co-based alloys. Valve, pump, bearing and seal applications in the oil and gas, chemical processing and power generation markets as well as consumer electronics and industrial cutting tools are among potential applications. Preliminary results from laboratory and partial mill products are given below.
Material is expected to be available for trial evaluation as manufacturing progresses. Planned product forms include sheet, plate, bar, weld wire, and powder. To see more on this alloy, visit our technical library.
*For more information on HASTELLOY® WR-66™ alloy, please contact Brandon Furr at (832) 835-4681 or [email protected].
Nominal Composition
| Weight % | |
| Cobalt | Balance |
| Chromium | 27 |
| Molybdenum | 5 |
| Iron | 3 |
| Tungsten | 2.5 |
| Nickel | 1 |
| Manganese | 1 |
| Silicon | 0.3 |
| Nitrogen | 0.125 |
| Aluminum | 0.1 |
| Carbon | 0.065 |
Corrosion Resistance
Corrosion Rate Comparison*
*STELLITE® 6 rates Normalized to 1 (Lower is Better)
Wear Resistance
Resistance to Sliding Wear – Wrought Alloys
Resistance to Sliding Wear: Overlays
Galling Resistance
Galling Resistance of 3-Layer Overlays: 9000 lbs Load*
Disclaimer
Haynes International makes all reasonable efforts to ensure the accuracy and correctness of the data displayed on this site but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. Alloy properties disclosed here are based on work conducted principally by Haynes International, Inc. and occasionally supplemented by information from the open literature and, as such, are indicative only of the results of such tests and should not be considered guaranteed maximums or minimums. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
For specific concentrations of elements present in a particular product and a discussion of the potential health affects thereof, refer to the Safety Data Sheets supplied by Haynes International, Inc. All trademarks are owned by Haynes International, Inc., unless otherwise indicated.