a ni — cr — fe alloy with improved resistance to stress corrosion cracking in nuclear environments , the alloy comprising 23 - 28 wt % cr , 25 - 35 wt % ni , & lt ; 0 . 03 wt % c , & lt ; 0 . 70 wt % si , & lt ; 1 . 0 wt % mn , & lt ; 0 . 015 wt % s , & gt ; 0 . 35 wt % ti , 0 . 15 - 0 . 45 wt % al , & lt ; 0 . 75 wt % cu , and balance fe and incidental impurities . the alloy may be used in steam generator tubing of a nuclear reactor . a method of producing an article includes : providing the alloy as disclosed herein ; forming the alloy into the article by cold working the alloy to 20 %; and heat treating the article .