Ibandisa cishe ama-80% okuqala ukukhiqizwa kwensimbi engagqwali.
Isetshenziswa kabanzi ekuhlolweni kwamafutha okuphuma olwandle kanye negesi \ Prokhiqiteleni kanye nakushintshile ekushiseni ku-petrochemical \ ukucubungula kwamakhemikhali.
I-F51 Insimbi Engagqwali ihlanganisa ukumelana okuthuthukile ekuqhekekeni kokugqwala kokuqhekeka, ukugcwala okukhohlisayo, ukugqwala kwe-crevice namandla aphezulu. Ngenxa yalokho kukhethwa kwamakhemikhali i-F51 Dumplex Steel engagqwali imelana nezimo ze-chloride kanye nokugqwala kwengcindezelo ye-sulphide. I-ASTM A182 F51 FLACE yenziwa ngendwangu yensimbi ye-duplex. Izinto ezibonakalayo zinezimfanelo zombili ze-Ferritic neze-auntenitic kwi-metlurgic miscrumpcure. Amandla ashubile wezinto ezibonakalayo ngu-620MPA kanye namandla aphansi wesivuno angama-450mpa.