Dab tsi yog qhov txawv ntawm 300 series thiab 400 series stainless hlau pob

300 series (SS304 SS316 SS304L SS316L thiab lwm yam) "austenitic" stainless hlau pob muaj chromium thiab npib tsib xee thiab tsis yog hlau nplaum. Lawv muaj kev tiv thaiv corrosion zoo dua li 400 series (SS420C SS420 SS440 SS440C), (qhov tseeb, qhov siab tshaj plaws corrosion tsis kam ntawm pawg stainless). Lawv tsis nkig tsawg, thiab tuaj yeem ua kom tawv los ntawm kev ua haujlwm txias. Lub 400 series stainless hlau pob yog "ncaj chromium." Nws muaj cov pa roj carbon ntau los ua kom nws sib nqus, thiab muaj kev tiv thaiv corrosion tsawg dua 300 series. "Martensitic" tuaj yeem kho tau yooj yim kho kom tawv nqaij, ua rau nws nkig. Martensitic qib tau teev tseg rau cov ntawv thov uas xav tau lub zog, hardness thiab hnav tsis kam.