I-internel 625 isebenza kakuhle iNickel-chromium-molybdenum owaziwayo ngamandla ayo aphezulu, ubushushu kunye nokunganyangeki konyango. Le proilloy iqokelelwe nge-nickel (ubuncinci i-58%), ilandelwe yiChromium, i-molybdenum, i-niobium, i-silicon, kunye ne-banticon, i-balicon, i-aluminium, kunye ne-titanium.