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.