EN AW – 7020 (AlZn4,5Mg1 – 3.4335)

Stand: Juni 2015 - Quelle: DIN EN 573-3 / EN 515 / DIN 17611:2011

1. Chemical composition of EN AW – 7020

in the aftermath of DIN EN 573-3 (in % of the mass, rest AL)

SiFeCuMnMgCrZnTiRemarkOther elements
0,350,40,20,05-0,51,0-1,40,1-0,354,0-5,0Ti+Zr 0,08-0,250,15

2. mechanical properties of EN AW – 7020

in the aftermath of DIN EN 485-2 Sheets and plates (common conditions)

ConditionNominal thicknessTensile strengthPlug-in limitUltimate elongationRigor
in mmRm in MPaRp0,2 in MPain % (min.)HBS
overup tominmaxminmaxA50A
T623,06,035028010104
T6516,012,53502809104
40,0100,03402708101
Physical propertiesGeneral properties
(Guide values for 20° C)
Density of g/cm32,77Resistance to:
Solidification range ° C600-650– Sea water4
Electrical conductivity MS/m19-23– Weather conditions3
Thermal conductivity W/(mK)130-160Hot formability
Therm. linear expansion-– extrusion presses2
Coeffizient 10-6/K23,1– Drop forging2
Modulus of elasticity N/mm270.000– Open die forging2
WeldabilitySurface treatment
Fusion weldingProtection anodizing2
– Gas3Anodizing (decorative)3
– WIG2Painting/Coating2
– MIG1
Resistance welding6Contact with foodno
Machinability T651
2

3. Main application / Special features of EN AW – 7020:

Profiles and tubes for welded structures and supporting structures, welded structures with high required tensile strength. Hardens independently after fusion welding.

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