SiMo
SiMo cast iron is a type of cast iron produced as a result of the search for materials with a certain strength and hardness at high temperatures as well as a certain ductility. As the name suggests, these materials which are produced to have a nodular graphite cast iron structure, contain higher levels of silicium (Si) and some molybdenum (Mo) compared to conventional ductile cast irons.
|
Material Code |
No. |
Silicium (%) |
Molybdenum (%) |
|
EN-GJS-SiMo25-5 |
53.111 |
2,3 – 2,7 |
0,4 – 0,6 |
|
EN-GJS-SiMo30-7 |
53.112 |
2,8 – 3,2 |
0,6 – 0,8 |
|
EN-GJS-SiMo35-5 |
53.113 |
3,3 – 3,7 |
0,4 – 0,6 |
|
EN-GJS-SiMo40-6 |
53.114 |
3,8 – 4,2 |
0,5 – 0,7 |
|
EN-GJS-SiMo40-10 |
53.115 |
0,8 – 1,1 |
|
|
EN-GJS-SiMo45-6 |
53.116 |
4,3 – 4,7 |
0,5 – 0,7 |
|
EN-GJS-SiMo45-10 |
53.117 |
0,8 – 1,1 |
|
|
EN-GJS-SiMo50-6 |
53.118 |
4,8 – 5,2 |
0,5 – 0,7 |
|
EN-GJS-SiMo50-10 |
53.119 |
0,8 – 1,1 |
Similar to SSF ductile irons, SiMo alloyed ductile irons with high silicium have a relatively ductile matrix structure due to their ferritic structure. High silicium increases the stability of the material at high temperature, both by promoting a ferritic microstructure and increasing the austenite (eutectoid) transformation temperature. Thanks to the solid solution hardening obtained as a result of high silicium, a significant increase especially in yield strength rather than tensile strength can be observed. As a final note, SiMo alloyed ferritic ductile cast irons exhibit a higher resistance to creep at high temperatures..