{"id":1926,"date":"2024-08-06T16:16:42","date_gmt":"2024-08-06T16:16:42","guid":{"rendered":"https:\/\/haynesintl.com\/alloys\/haynes-282\/"},"modified":"2025-09-11T11:09:12","modified_gmt":"2025-09-11T11:09:12","slug":"haynes-282","status":"publish","type":"alloys","link":"https:\/\/haynesintl.com\/en\/alloys\/alloy-portfolio\/high-temperature-alloys\/haynes-282\/","title":{"rendered":"HAYNES\u00ae<\/sup> 282\u00ae<\/sup>"},"content":{"rendered":"\n
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Principal Features<\/h2>\n\n\n\n

HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy (UNS N07208) is a, wrought, gamma-prime strengthened superalloy developed for high temperature structural applications, especially those in aero and industrial gas turbine engines. It possesses a unique combination of creep strength, thermal stability, weldability, and fabricability not found in currently available commercial alloys. The excellent creep strength in the temperature range of 1200 to 1700\u00b0F (649 to 927\u00b0C) surpasses that of Waspaloy alloy, and approaches R-41 alloy without sacrificing weldability.<\/p>\n\n\n\n

Easily Fabricated<\/h3>\n\n\n\n

This high level of creep strength in HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy has been attained at a relatively low volume fraction of the strengthening gamma-prime phase, resulting in outstanding resistance to strain-age cracking (normally a problem with superalloys in this creep strength range). Additionally, slow gamma-prime precipitation kinetics allow for the alloy to have excellent ductility in the as-annealed condition. Consequently, HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy exhibits superior weldability and fabricability. Machinability is similar to that of Waspaloy.<\/p>\n\n\n\n

Heat Treatment<\/h3>\n\n\n\n

HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy is provided in the solution-annealed condition, in which it is readily formable. The typical solution-annealing temperature is in the range of 2050 to 2100\u00b0F (1121 to 1149\u00b0C). After component fabrication, the alloy is heat treated to develop its high-strength condition by precipitating and growing the ordered Ni3<\/sub>Al gamma prime phase.  The three heat treatments described below provide 282\u00ae<\/sup> alloy the versatility needed to meet a variety of targeted applications.<\/p>\n\n\n\n

Standard two-step heat treatment<\/strong>: heat the alloy to 1850\u00b0F (1010\u00b0C) \/ 2 hours \/ air cool (AC) + 1450\u00b0F (788\u00b0C) \/ 8 hours \/ AC. This is the originally 282\u00ae<\/sup> alloy heat treatment.<\/p>\n\n\n\n

Alternative two step heat treatment:<\/strong> heat the alloy to 1650\u00b0F(899\u00b0C)\/4h\/AC + 1450\u00b0F(788\u00b0C)\/8h\/AC.  This heat treatment was patented by Haynes upon the discovery of a meaningful increase in the containment factor; see this link for more information<\/a>.<\/p>\n\n\n\n

Single step heat treatment:<\/strong> heat the alloy to 1475\u00b0F(802\u00b0C)\/8h\/AC.  This is the heat treatment required by the American Society of Mechanical Engineers (ASME) pressure vessel code.  See Code Case 3024 and this link<\/a> for more information.<\/p>\n\n\n\n

Product Forms<\/h3>\n\n\n\n

HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy is available in a full range of product forms and sizes, including plate, sheet and coil products from foil thickness up to cross-sections greater than 2\u201d (>50mm) thick; Bar and wire from up to 9\u201d in diameter, Reforge billet and ingot products from 4\u201d up to 20\u201d (100-500mm) diameters; and seamless and welded Pipe and tube in some standard sizes. Vacuum castings have also been produced for various applications, and powder products are available to support many Additive Manufacturing methods.<\/p>\n\n\n\n

Applications<\/h3>\n\n\n\n

HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy fabricability and two step heat treatments make the alloy suitable for critical gas turbine applications found in the combustors, turbine and exhaust sections, and nozzle components. The alternative two-step heat treatment<\/em> should be strongly considered for hot gas path components<\/em> applications that require higher containment properties such as engine cases and rolled rings.  The integrity of industrial gas turbine combustor liners and exit frames can also benefit from the alternative two-step heat treatment. <\/em><\/p>\n\n\n\n

HAYNES\u00ae<\/sup> 282\u00ae<\/sup> alloy is also a strong candidate for use in Advanced Ultra-Supercritical (A-USC) boiler and steam turbines, supercritical CO2<\/sub> power cycles, and concentrating solar power plants, where creep life is required to surpass 100,000 hours at 14.5 ksi (100 MPa) at 1400\u00b0F (760\u00b0C). <\/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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Nominal Composition<\/h2>\n\n\n\n
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\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 Balance <\/td>\n <\/tr>\n
\n Chromium <\/td>\n \n 20 <\/td>\n <\/tr>\n
\n Cobalt <\/td>\n \n 10 <\/td>\n <\/tr>\n
\n Molybdenum <\/td>\n \n 8.5 <\/td>\n <\/tr>\n
\n Titanium <\/td>\n \n 2.1 <\/td>\n <\/tr>\n
\n Aluminum <\/td>\n \n 1.5 <\/td>\n <\/tr>\n
\n Iron <\/td>\n \n 1.5 max. <\/td>\n <\/tr>\n
\n Manganese <\/td>\n \n 0.3 max. <\/td>\n <\/tr>\n
\n Silicon <\/td>\n \n 0.15 max. <\/td>\n <\/tr>\n
\n Carbon <\/td>\n \n 0.06 <\/td>\n <\/tr>\n
\n Boron <\/td>\n \n 0.005 <\/td>\n <\/tr>\n <\/table>\n<\/div>