Haynes 188 / Alloy 188
2.4683Cobalt-nickel-chromium-tungsten superalloy with lanthanum addition for oxidation resistance. Solid-solution strengthened. Bright annealed: Rm ~946 MPa, Rp0.2 ~464 MPa, A ~53%. At 980°C: Rm ~243 MPa, Rp0.2 ~131 MPa. Density 8.98 g/cm³. Excellent oxidation and sulfidation resistance to 1095°C. Good resistance to molten chloride salts and sulfate hot corrosion. UNS R30188, AMS 5608 (sheet), AMS 5772 (bar). Applications: gas turbine combustors, transition ducts, flame holders, afterburner liners, industrial furnace components.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | R30188 | — | % |
| 🇩🇪 | EN/DIN | Germany | CoCr22Ni22W14 | 2.4683 | % |
| 🇺🇸 | AMS | USA | AMS 5608 / AMS 5772 | — | % |
| 🇺🇸 | Haynes | USA | Haynes 188 | — | % |
| 🇺🇸 | Aircraft | USA | Udimet 188 | — | % |
Sources: SAE/ASTM, DIN, SAE AMS, haynesintl.com, aircraftmaterials.com
Mechanical properties
Compatibility verdict
Haynes 188 / Alloy 188 and R30188: null% composition match
Related materials
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Stellite 6
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CoCrMo F75
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