trimal alloy for ductile applications - bohai trimet
TRANSCRIPT
trimal®-37Alloy for ductile applications
trimal®-37
Short- and longterm heat stability
Summarytrimal®-37 die cast alloy • hasexcellentcastanddie-fillingbehavior• canbeeasilyremovedfromthedie• hashighheatstability• hashighductilityincombinationwith goodstrength•hasgoodcorrosionresistance• isweldablewithallcommonweldingmethods.
trimal®-37 (AlSi9Mn) alloy was developed specially for the high pressure die casting process. In comparison to common die cast alloys, it has excellent ductility, which is evident from its high elongation and good energy absorption capability. As a result, trimal®-37 is particularly suited for applications that require ductility and are not intended for heat treatment.
trimal®-37hasasiliconcontentofabout9%andisthusideallysuitedforcastingcomplicatedstruc-tures.Thelowironcontentintrimal®-37preventstheformationofcoarseintermetalicphases;man-ganese andmolybdenum prevent sticking to thedie.Bymodificationwithstrontium,thestructureof theeutectic silicon is sofine that itcannotbeobserved under a light-optical microscope evenwithamagnificationof1000x.
Copper, zirconandmanganese create theneces-sary strength at room temperature and providegood heat stability at higher temperatures. Thesiliconcanbeglobulizedthroughshortannealingthat is performed below the blister temperature,thusincreasingtheductilityevenfurther.Thelowmagnesiumcontentof less than0.08%preventsthematerialfromshortorlong-termaging.
Chemical composition in weight%
Mechanical propertiesThe following mechanical properties were deter-mined using real parts and are considered to bereferencevaluesfortheuseofthealloy.
trimal®-37Alloyforductileapplications
% Min. Max.
Si 8.5
10.5
Fe
0.15
Cu 0.02 0.05
Mn0.3 0.6
Mg
0.08
Mo
0.3
% Min. Max.
Zr 0.1 0.3
Zn
0.05
Ti
0.06
V0.03 0.10
Other
0.15
Balance
Al
Temper
FO
Young’s modulus
GPa
65 - 75 65 - 75
Yield strength
Rp0.2MPa
120 - 140 100 - 120
Tensile Strength
RmMPa
250 - 290 200 - 240
HardnessHB
80 - 90 65 - 75
ElongationA%
8 - 15 10 - 18
Measured with a wall thickness of 2 – 3 mm
Measured with a wall thickness of 2 – 3 mmThe alloy has been modified with strontium
Temper
205°C - 60min. 150°C - 1000h
Young’s modulus
GPa6565
Rp0.2MPa
134135
RmMPa
280250
A%
1011
TRIMET Aluminium SE •Aluminiumallee1•D-45356EssenTel.+49201-3660•www.trimet.de
CopyrightTheinformationprovidedinthisbrochurewasgatheredinpropertestsandisgiventothebestofourknowledgeandbelief.However,aswithallapplicationsuggestions,theyaresolelynonbindingreferencesthatarenotcoveredbyourcontractualobligations(includinganythird-partycopyrights)andforwhichwearenotliable.Thedatadonotconstituteaguaranteeforpropertiesanddonotreleasetheuserfromhisresponsibilitytotestwhetherourproductsaresuitedfortheirintendeduse.Thereproduction,translationandcopyingofthisbrochure,inwholeorpart,aresubjecttoourexpressauthorization.Newalloysandtheirtechnologicaladvancementsthataredevelopedafterthebrochurehasgoneintoprintwillbepresentedinthenextissue.
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