ST12 kwenikweni ozizira adagulung'undisa zitsulo, ST12 ndi muyezo German (DIN1623), wofanana EN10130 DC01, JS SPCC, American muyezo ASTM A1008 CS.ST12 ndi wamba ozizira adagulung'undisa chitsulo, ST13 masitampu kalasi ozizira adagulung'undisa zitsulo, ST14 ndi chakuya kujambula kalasi ozizira adagulung'undisa zitsulo, ST12 akufotokozedwa ngati nambala wamba chitsulo, ndi q195, spcc, DC01 kalasi zakuthupi ali chimodzimodzi.