I-silicon manganese alloy (SiMn) yenziwe ngesilicon, manganese, intsimbi, ikhabhoni encinci kunye nezinye izinto.Iziphumo zokongezwa kwe-silicomanganese kwintsimbi: Zombini isilicon kunye nemanganese zinefuthe elibalulekileyo kwiipropathi zentsimbi.