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.
