Sfero Casting

SiMo

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.

Technical Specifications

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..

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