{"id":1918,"date":"2024-08-06T16:16:42","date_gmt":"2024-08-06T16:16:42","guid":{"rendered":"https:\/\/haynesintl.com\/alloys\/haynes-233\/"},"modified":"2026-04-13T17:29:48","modified_gmt":"2026-04-13T17:29:48","slug":"haynes-233","status":"publish","type":"alloys","link":"https:\/\/haynesintl.com\/en\/alloys\/alloy-portfolio\/high-temperature-alloys\/haynes-233\/","title":{"rendered":"HAYNES\u00ae<\/sup> 233\u00ae<\/sup>"},"content":{"rendered":"\n
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Principal Features<\/h2>\n\n\n\n

HAYNES\u00ae<\/sup>\u00a0233\u00ae<\/sup>\u00a0alloy is a new Ni-Co-Cr-Mo-Al alloy that offers excellent oxidation resistance at temperatures to 2100\u00b0F (1149\u00b0C) or higher, depending on application, coupled with superior creep strength \u2013 a combination of properties never before achieved in a readily fabricable alloy. The alloy obtains its exceptional oxidation resistance through the formation of a protective alumina layer, while the high creep strength is a result of solid-solution and carbide strengthening. Additionally, for use at low to intermediate temperature applications (below the gamma-prime solvus of 1767\u00b0F (964\u00b0C)) the alloy can be age-hardened by heat treatment to produce even greater strength. Finally, the alloy can be readily fabricated using conventional methods since it exhibits good hot workability, cold formability, and weldability. Potential applications include hot gas path components in aerospace and industrial gas turbines, industrial heating fixtures and sensors, various structural components in the emerging energy and chemical process markets.<\/p>\n\n\n\n

For additional information about HAYNES\u00ae<\/sup>\u00a0233\u00ae<\/sup>\u00a0alloy, please contact Victor Paramo at 765-456-6226 or\u00a0VParamo@haynesintl.com.<\/a><\/p>\n\n\n\n

*Please contact our\u00a0technical support team<\/a>\u00a0if you have technical questions about this alloy.<\/p>\n<\/div><\/div>\n\n\n\n

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Heat Treatment<\/h2>\n\n\n\n

HAYNES\u00ae<\/sup><\/sup>\u00a0233\u00ae<\/sup><\/sup>\u00a0alloy is supplied in the mill (solution) annealed condition and may be used in either the solution annealed or age-hardened condition, depending on application. Solution annealing is typically performed by heating to a temperature in the range of 2100 to 2150\u00b0F (1149 to 1177\u00b0C) for a time commensurate with thickness, followed by a water quench. The solution annealed condition is most appropriate for applications above 1767\u00b0F (964\u00b0C). 233\u00ae<\/sup><\/sup>\u00a0alloy can be age-hardened to significantly increase strength at low to intermediate temperatures (below the gamma-prime solvus of 1767\u00b0F (964\u00b0C)). A typical age-hardening heat treatment for this alloy is 1650\u00b0F\/4h\/AC + 1450\u00b0F\/8h\/AC (899\u00b0C\/4h\/AC + 788\u00b0C\/8h\/AC).

As the heat treatment has a significant impact on properties at various temperatures, the properties in this brochure are clearly segregated by condition.<\/p>\n<\/div><\/div>\n\n\n\n

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Nominal Composition<\/h2>\n\n\n\n
\n
\n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Weight % <\/td>\n <\/tr>\n
\n Nickel <\/td>\n \n 48 (Balance) <\/td>\n <\/tr>\n
\n Chromium <\/td>\n \n 19 <\/td>\n <\/tr>\n
\n Cobalt <\/td>\n \n 19 <\/td>\n <\/tr>\n
\n Molybdenum <\/td>\n \n 7.5 <\/td>\n <\/tr>\n
\n Titanium <\/td>\n \n 0.5 <\/td>\n <\/tr>\n
\n Aluminum <\/td>\n \n 3.3 <\/td>\n <\/tr>\n
\n Iron <\/td>\n \n 1.5 max. <\/td>\n <\/tr>\n
\n Manganese <\/td>\n \n 0.4 max. <\/td>\n <\/tr>\n
\n Silicon <\/td>\n \n 0.20 max. <\/td>\n <\/tr>\n
\n Carbon <\/td>\n \n 0.1 <\/td>\n <\/tr>\n
\n Boron <\/td>\n \n 0.004 <\/td>\n <\/tr>\n
\n Tantalum <\/td>\n \n 0.5 <\/td>\n <\/tr>\n
\n Tungsten <\/td>\n \n 0.3 max. <\/td>\n <\/tr>\n
\n Yttrium <\/td>\n \n 0.025 max. <\/td>\n <\/tr>\n
\n Zirconium <\/td>\n \n 0.03 <\/td>\n <\/tr>\n <\/table>\n<\/div>