EN AW – 7021 Plancast plus

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

1. Chemical composition of EN AW – 7021

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
0,25 0,4 0,25 0,1 1,2-1,8 0,08-0,18 5,0-6,0 0,1

2. mechanical properties of EN AW – 7021

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 % (mm) HBS
over up to min max min max A50 A
T731 100 400 420 360 380 5 5 135
Physical properties General properties
(Density of 20° C)
Dichte in g/cm3 2,80 Resistance to:
Solidification range ° C 580-630 – Sea water 4
Electrical conductivity MS/m 21-24 – Weather conditions 3
Thermal conductivity W/(mK) 125-155 Hot formability
Therm. linear expansion- – extrusion presses
Coeffizient 10-6/K 20-24 – Drop forging
Modulus of elasticity N/mm2 70.000 – Open die forging
Weldability Surface treatment
Fusion welding Protection anodizing 2
– Gas Anodizing (decorative) 6
– WIG 2 Painting/Coating 2
– MIG 2
Resistance welding 6 Contact with food no
Machinability
– T731 2

3. Main application / Special features of EN AW – 7021:

Robot parts, transfer plates, printing machine parts, defence technology, welded constructions. Plancast 7021 is a high-strength cast plate which can be used as a raw blank or as a surface-milled precision plate. No microporosity of the casting plate, therefore also suitable for vacuum and hydraulic applications. Material hardens again automatically after heat application.

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