H-3057D 25 alloy - Haynes International, Inc.

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HAYNES ® 25 alloy©2004 Haynes International, Inc.
PRINCIPAL FEATURESExcellent High-TemperatureStrength and GoodOxidation ResistanceHAYNES ® 25 alloy is a cobaltnickel-chromium-tungstenalloy that combines excellenthigh-temperature strength withgood resistance to oxidizingenvironments up to 1800°F(980°C) for prolonged exposures,and excellent resistanceto sulfidation. It can befabricated and formed byconventional techniques, andhas been used for cast components.Other attractivefeatures include excellentresistance to metal galling.FabricationHAYNES 25 alloy has goodforming and welding characteristics.It may be forged orotherwise hot-worked, providingthat it is held at 2200°F(1205°C) for a time sufficientto bring the entire piece totemperature. The alloy hasgood ductility, and thus alsomay be formed by cold working.The alloy does workhardenvery rapidly, however,so frequent intermediateannealing treatments will beneeded for complex componentforming operations. All hot- orcold-worked parts should beannealed and rapidly cooled inorder to restore the best balanceof properties. The alloycan be welded by both manualand automatic welding methods,including gas tungsten arc(GTAW), gas metal arc(GMAW), shielded metal arc,electron beam and resistancewelding. It exhibits goodrestraint welding characteristics.Heat TreatmentWrought HAYNES 25 alloy isfurnished in the solution heattreatedcondition, unlessotherwise specified. The alloyis normally solution heat-treatedat 2150 to 2250°F (1175 to1230°C) and rapidly cooled orwater-quenched for optimalproperties. Annealing attemperatures less than thesolution heat-treating temperaturewill produce some carbideprecipitation in 25 alloy, whichmay affect the alloy’s properties.Available in Convenient FormsHAYNES 25 alloy is producedin the form of plate, sheet,strip, billet, bar, wire, coatedelectrodes, pipe and tubing.ApplicationsHAYNES 25 alloy combinesproperties which make itsuitable for a number ofcomponent applications in theaerospace industry, includingparts in established militaryand commercial gas turbineengines. In modern engines, ithas largely been replaced bynewer materials such asHAYNES 188 alloy, and, mostrecently, 230 ® alloy, whichpossess improved properties.Another area of significantusage for 25 alloy is as abearing material, for both ballsand races.Applicable SpecificationsHAYNES 25 alloy is coveredby the following specifications:AMS 5537 (sheet, strip andplate), AMS 5759 (bar, ringsand forgings), AMS 5796(welding wire), and AMS 5797(coated welding electrodes).The UNS number for thismaterial is R30605.Nominal Chemical Composition, Weight PercentCo a Ni Cr W Fe Mn Si C51 10 20 15 3* 1.5 0.4* 0.10a*MaximumAs balance3HAYNES ® 25 alloy
Page 1: HIGH-TEMPERATURE ALLOYSHAYNES ® 25
Page 7 and 8: COLD-WORKED PROPERTIESHAYNES 25 all
Page 9 and 10: IMPACT STRENGTH PROPERTIES, PLATETy
Page 11 and 12: TYPICAL PHYSICAL PROPERTIES (contin
Page 13 and 14: OXIDATION RESISTANCEHAYNES ® 25 al
Page 15 and 16: Schematic Representation of Metallo
Page 17 and 18: WELDINGHAYNES ® 25 alloy is readil
Page 19 and 20: MACHINING (continued)Operation High

H-3057D 25 alloy - Haynes International, Inc.

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