SS400 ne sau da yawa birgima cikin waya sanda ko zagaye karfe, square karfe, lebur karfe, kwana karfe, I-beam, tashar karfe, taga frame karfe, da dai sauransu, da matsakaici da kauri karfe faranti. Ana amfani da shi sosai a cikin gine-gine da tsarin injiniya. Ana amfani da shi don yin sandunan ƙarfe ko gina firam ɗin ginin masana'anta, hasumiya mai ƙarfin wutar lantarki, gadoji, motoci, tukunyar jirgi, kwantena, jiragen ruwa, da sauransu. Hakanan ana amfani da shi azaman sassa na inji waɗanda basa buƙatar babban aiki. C, D sa karfe kuma za a iya amfani da matsayin wasu ƙwararrun karfe.
Matsayin gudanarwa: GB/T na gida, ASTM na Amurka, daidaitaccen JIS na Jafananci, DIN Jamusanci