At values in excess of 80, the start pressure for tools and equipment increases to critical levels. This means that an 8″ ingot produces a total runout weight of 1.1 kg/m, and a 10″ ingot 1.7 kg/m.
At values below 7, the necessary mechanical conversion is insufficient to ensure the required material characteristics without implementing special measures. In the case of an 8″ ingot, this produces a maximum extrusion weight of 12.5 kg/m, and a for 10″ ingot a maximum of 19.6 kg/m.
FORM FACTOR
To calculate the relative compactibility of an extrusion, you can use the numerical value obtained from the ratio total perimeter / extrusion weight for that extrusion. “Total perimeter” refers to the total interior and exterior perimeter of the extrusion.
This produces a form factor that can be easily compared with that of an existing extrusion. Although this method does not fully take into account factors such as a symmetry and uneven material distribution, it does provide a rough comparison value.
The lower the value, the easier it is to compact. Some comparison values are shown in the table below:
| Extrusion | Weight (kg/m) | Perim.(mm) | Form factor |
|---|---|---|---|
| Pipe 50x40 | 1,91 | 283 | 148 |
| Pipe 50x47 | 0,62 | 305 | 491 |
| Lprofil 100x100x5 | 2,63 | 400 | 452 |
| Lprofil 100x100x1,5 | 0,78 | 400 | 513 |
| PLST 100×50 | 13,5 | 300 | 22 |
| PLST 100×1,5 | 0,41 | 203 | 495 |
| Round stock Ø80 | 13,57 | 251 | 18,5 |
