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)

Si Fe Cu Mn Mg Cr Zn Ti Remark Other elements
0,35 0,4 0,2 0,05-0,5 1,0-1,4 0,1-0,35 4,0-5,0 Ti+Zr 0,08-0,25 0,15

2. mechanical properties of EN AW – 7020

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

Condition Nominal thickness Tensile strength Plug-in limit Ultimate elongation Rigor
in mm Rm in MPa Rp0,2 in MPa in % (min.) HBS
over up to min max min max A50 A
T62 3,0 6,0 350 280 10 104
T651 6,0 12,5 350 280 9 104
40,0 100,0 340 270 8 101
Physical properties General properties
(Guide values for 20° C)
Density of g/cm3 2,77 Resistance to:
Solidification range ° C 600-650 – Sea water 4
Electrical conductivity MS/m 19-23 – Weather conditions 3
Thermal conductivity W/(mK) 130-160 Hot formability
Therm. linear expansion- – extrusion presses 2
Coeffizient 10-6/K 23,1 – Drop forging 2
Modulus of elasticity N/mm2 70.000 – Open die forging 2
Weldability Surface treatment
Fusion welding Protection anodizing 2
– Gas 3 Anodizing (decorative) 3
– WIG 2 Painting/Coating 2
– MIG 1
Resistance welding 6 Contact with food no
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.

Top