Hariho formulaire zitandukanye hamwe na calculatrice kumurongo ureka umuntu akabara byoroshye uburemere bwibyuma.

Ibyuma bitagira umwanda bishyirwa mu byiciro 5 kandi birimo 200 na 300 byuruhererekane rwibyuma bitazwi nka austenitis ibyuma bitagira umuyonga.Noneho hariho serie 400, arizo ferritic stainless ibyuma.Urukurikirane 400 hamwe na 500 byitwa martensitike idafite ibyuma.Noneho hariho ubwoko bwa PH bwibyuma bitagira umwanda, aribwo imvura igabanya urwego rukomeye.

Ubwanyuma, hariho imvange ya ferritic na austenitis ibyuma bitagira umuyonga, bizwi nka duplex ibyuma bitagira umuyonga.