adding material

Dear Forum,
Greetings from India.
Have created models/parts for tooling for Cold forming die sets.Due to the heavy tonnage taken while forming of parts at roomtemperature, we need to analyse them for its design. while ianalyse them on Cosmos works, i do get some predesigned materials.How can i add materials and their specifications? where to savethem? could anyone be of any help to me.
thanks and regards.SolidworksSimulation