Haynes® 188 is a cobalt-nickel-chromium-tungsten that has excellent high-temperature strength with good resistance to oxidizing environments in prolonged exposures up to 2000°F. It also has good resistance to sulfate deposit hot corrosion. This alloy can be forged or other hot-worked, maintaining that it is held at 2150°F until the entire piece comes to temperature. All hot or cold worked parts should be annealed and rapidly cooled in order to restore the best balance of properties. This alloy also has an excellent resistance to molten chloride salts and to gaseous sulfidation. It is typically used in aerospace as well as military and commercial gas turbine engines.
Available in multiple sizes and diameters in wire and spool.
(Cold Worked 0%) Tensile: 192 ksi; Yield: 136 ksi; Elongation: 34%
(Cold Worked 20%) Tensile: 224 ksi; Yield: 161 ksi; Elongation: 5.6%
(Cold Worked 37%) Tensile: 292 ksi; Yield: 238 ksi; Elongation: 4.1%
(Cold Worked 50%) Tensile: 263 ksi; Yield: 314 ksi; Elongation: 3.3%
Chemical Composition (Wt%):
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