Answer
Mugihe byombi ari ibyuma bitagira umuyonga, $ 316 $ Steelless Steel irimo $ 2-3 \% $ Molybdenum ($ Mo $), ibyo bikaba byongera imbaraga zo kurwanya 'piting' na 'crevice corrosion' mubidukikije bikungahaye kuri chloride (nkamazi yinyanja). $ 302 $ Ibyuma bitagira umuyonga birashobora kwibasirwa nigitero cyaho. Nyamara, $ 302 $ arashobora gukonjeshwa-gukora kugirango imbaraga zirenze urugero ($> 200 $ ksi) kurenza $ 316 $ ($> 160 $ ksi), bivuze ko $ 302 $ impeta ishobora gutwara imitwaro iremereye kubunini bumwe. Kubikorwa bya marine, niba umutwaro uringaniye, $ 316 $ birahitamo. Niba hakenewe umutwaro munini, $ 302 $ impeta hamwe nubuvuzi bwa 'Passivation' (kuri ASTM A967) cyangwa kurangiza 'Black Oxide' irashobora gukoreshwa, nubwo $ 17-7PH $ aribwo buryo bwiza bwo kumvikana kubwimbaraga no kurwanya ruswa.
