Nickel bụ isi akụrụngwa maka igwe anaghị agba nchara yana ihe ruru 50% nke ngụkọta ọnụ.
Carbon ígwè bụ ihe alloy nke carbon na ígwè na a carbon ọdịnaya nke ruo 2.1% site arọ.Mmụba nke carbon ọdịnaya na-eme ka ike na ike nke ígwè, ma mbelata ductility.Carbon ígwè nwere ezigbo Njirimara na okwu nke siri ike na ike na dị ọnụ ala karịa ndị ọzọ ígwè.
A na-eji ọkpọkọ ígwè na-enweghị ihe ọ bụla eme ihe na nrụnye nuklia, nnyefe gas, petrochemical, shipbuilding, boilers na ụlọ ọrụ ndị ọzọ, nke nwere nnukwu nguzogide corrosion na ezigbo nrụ ọrụ.