Inconel 625 Bolts were developed in the 1960s as a vapor-lined piping material to provide high strength even in extreme high temperatures ranging from freezing low temperatures to 1800¡ãF. Inconel 625 Bolts, also known as Alloy 625, are known for their amazing ability to maintain strength and heat resistance in and out of corrosive environments. The presence of nickel and chromium makes Inconel 625 bolts resistant to corrosion, oxidation and carburization. Molybdenum helps provide excellent fatigue strength and resistance to stress, pitting and crevice corrosion cracking even when exposed to chloride ions.