Ntupu eriri igwe anaghị agba nchara nwere akụkụ abụọ nke ferrite na austenite, yabụ aha a na-akpọ ntupu igwe anaghị agba nchara.
Atụmatụ: Njirimara igwe dị mma, nguzogide corrosion mara mma, ezigbo weldability, yana arụ ọrụ oke ọkụ kwụsiri ike.