Spheroidal graphite cast iron
Technical development demands ever better materials. These must enable reliable and efficient processing, while the material itself must also offer benefits impossible to achieve with previous materials.
Technical development demands ever better materials. These must enable reliable and efficient processing, while the material itself must also offer benefits impossible to achieve with previous materials.
 |
 |
 |
 |
 |
 |
|
 |
|
|
|
|
|
|
| Tool
designation to DIN EN 15613 |
EN-GJS 400-18 |
EN-GJS 400-15
|
EN-GJS 500-7
|
EN-GJS 600-3
|
EN-GJS 700-2
|
EN-GJS 800-2
|
|
|
|
|
|
|
|
| Tool
number to DIN EN 1563 |
EN-JS 1024/1025 |
EN-JS 1030 |
EN-JS 1050 |
EN-JS 1060 |
EN-JS 1070 |
EN-JS 1080 |
| Structure: Metalic base mass |
ferritic | ferritic | ferritic/ pearlitic |
predominantly pearlitic |
predominantly pearlitic |
pearlitic |
| Tensile strength
N/mm2 Test to DIN 50 109 |
400 | 500 | 600 | 700 | 800 | |
| 0,2% yield point N/mm2 | 250/240 | 250 | 320 | 380 | 440 | 500 |
| Stretch at break % | 15 | 7 | 3 | 2 | 2 | |
| Brinell
hardness HB 30 Test to DIN EN ISO 6506-1 |
120–165 | 135–185 | 170–220 | 200–250 | 235–285 | 270–335 |
| Density kg/dm3 | 7,10 | 7,10 | 7,15 | 7,20 | 7,20 | 7,20 |
| Shrinkage % | 0–0,5 | 0,8–1,0 | 0,8–1,0 | 0,8–1,0 | 0,8–1,0 | 1,0–1,5 |
| Minimum
wall thickness mm |
5 | 5 | 5 | 5 | 5 | 5 |
The marked quality of spheroidal graphite cast iron is the free graphite
which is present in spheroidal form as a result of special metalurgical
treatment. This treatment gives the material steel-like properties among
others.
The spheroidal graphite content allow good machining interruption times
to be achieved. Furthermore, tool wear can be reduced considerably despite
comparable strength. The higher cutting speeds reduce processing times
and therefore costs.