SAEAerospace AEROSPACE AMS 2770H An SAE international.Group MATERIAL penssi SPECIFICATION Revised AUG2006 SupersedingAMS2770G Heat Treatmentof WroughtAluminumAlloyParts RATIONALE AMS2770Hrepresentsatechnical revisionofthis specification. 1. SCOPE 1.1 esodind This specification specifies theengineering requirements for heat treatment, by part fabricators (users)ortheir vendors or subcontractors, of parts (See 8.8.1).It also covers heat treatment by warehouses or distributors converting raw material 7075,7149, 7178, 7249, 7475 1.1.1 organization (See 8.8.9). 1.2 1.3 TemperConversion When a warehouse,distributor or similarorganization converts rawmaterial toa differenttemper, it shall beheattreated accordancewithAMs2772andtherawmaterialspecification. 2. APPLICABLEDOCUMENTS The issueofthefollowing documents ineffect on thedate of the purchaseorderforms apart ofthis specification to the is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAEPublications Available from SAE International,400 Commonwealth Drive,Warrendale,PA15096-0001,Tel: 877-606-7323(inside USAand Canada)or724-776-4970(outside USA),orwww.sae.org. AMS2658 AMS2750 Pyrometry SAETechnical Standards BoardRules provide that:This report is publshedbySAEto advance the state of technicaland engineering sdences.The use ofthis report is entfrely SAErevewsachtechnicalreportatfeastveryfveyarsa whchtimeitmaybereamed,revised,orcancelled.AEinvtesyourwrttencommentsandsuggesions. Copyright2006SAE Intemational Allrightsreserved.Nopartofthispubllcationmaybereproduced,storedinaretrleval systemortransmitted,inanyfomorbyanymeans,electronlc,mechanical,photocopying recording,orotherwise,withoutthepriorwrittenpemissionofSAE TOPLACEADOCUMENTORDER: Tel: 877-606-7323 (nslde USA and Canada) Tel: Reproduced By IHS 724-776-4970 (outsideUSA) 724-776-0790 SHI With The Permission Of SAE [email protected] Under Royalty Agreement SAEWEBADDRESS: http://www.sae.org -2- SAE AMS2770H AMS2771 HeatTreatmentof AluminumAlloyCastings AMS2772 HeatTreatmentof AluminumAlloyRawMaterials AMS3025 PolyalkyleneGlycolHeatTreatQuenchant ARP1962 Training and Approval of Heat-Treating Personnel 2.2ASTMPublications AvailablefromASTMInternational,100BarrHarborDrive,P.0.BoxC700,WestConshohocken,PA19428-2959, Tel: 610-832-9585, orwww.astm.org. ASTM D 445 Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity) 3. TECHNICALREQUIREMENTS 3.1 Equipment 3.1.1 Pyrometry Shall conform toAMS 2750. 3.1.1.1 SolutionheattreatingfurmacesshallbeaminimumofClass2 (±10°For±6C) 3.1.1.2 AMS2750furnaceclassifications foraging shall be as foliows: 3.1.1.2.1 Aging ovens operating at or below 300 °F (149 °C) shall be a minimum of Class 2 (±10 °F or ±6 °C). 3.1.1.2.2 For alloys 7049, 7149, 7249 and 7050,aging ovens or aging fumaces operating above 300 °F shall be a minimumof Class1 (±5°For±3C). 3.1.1.2.3 For aging all other alloys, all ovens or furnaces operating above 300 °F (149 C) shall be a minimum of Class 2(±10°For±6℃C). 3.1.1.3 Annealing and stress relieving furnaces shall be a minimum of Class 5 (±25 °F or ±14C). 3.1.2 Furnaces 3.1.2.1 HeatingMedia Shall be air, molten salt bath, oil bath, or fluidized bed. The products of combustion and other materials that could contaminate parts shall not come into contact with parts during solution heat treating, annealing or stress relieving. prevent attack of the parts. 3.1.2.2 Temperature UniformityTest Recovery Requirements (See 8.8.11) For all solution heat treat and aging furnaces, the lag time between recovery of the first test thermocouple and the last test thermocouple to within 10°F (6 C),or 5°F (3 C)as applicable,of the set temperature during furnace unifomity tests shall not exceed the following: 3.1.2.2.1 Furnaces Tested Without a Load 20minutes. SAE AMS2770H -3- 3.1.2.2.2 FurnacesTestedWithaLoad 40 minutes. 3.1.2.3 Furnaces Used f