... accordance with SAEJ441, AMS 2431 standardsChemical composition304 Austenite Type(C) <0.25%,(Cr)=16~18%,(Ni)=6~ 10%,(Si)<1%,(Mn)<2 ... %430 Ferrite Typecarbon (C)<0.25%, chromium (Cr)=16~18%, silicon (Si)<1% and manganese (Mn ... )<1%410 Marten site Typecarbon (C)<0.25%, chromium (Cr)=11~13%, silicon (Si) <1% and manganese (Mn ...