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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