I-20Mn2, 40Mn2, kanye ne-50Mn2 zonke izinsimbi ze-alloy eziphansi ezinokwakheka nezici ezihlukahlukene.
Lezi zingcwecwe zensimbi zivame ukusetshenziswa ekukhiqizeni izingxenye ezihlukahlukene zemishini nezingxenye ezidinga amandla aphezulu, ukuqina, nokumelana nokugqoka. Imininingwane ethile yamapuleti ensimbi, afana nobukhulu, ukubekezelelana, nokuqedwa kwendawo, ingatholwa kubahlinzeki bensimbi noma abakhiqizi ngokusekelwe kuzimfuneko zakho ezithile.