Steel contains high Cr, which leads to high oxidation resistance and corrosion resistance. Adding Mn, Ni and N can obtain austenite structure. Adding carbon and nitrogen can obtain precipitation strengthening phase.
2 1-4N stipulates that the goods shall be delivered in a solid solution state with hardness ≤HB380, and it is also required to pass the hot upsetting inspection.
heat treatment
2 1-4N steel was solid-solution treated at1175℃ ~1h, and water-cooled aged at 750℃ ~ 850℃10h ~/kloc.