444/S44400/1.4521/019Cr19Mo2NbTi/sus444

ATI 444™ alloy is a low carbon and low nitrogen ferritic stainless steel containing 18% chromium, 2% molybdenum. The alloy is stabilized with additions of columbium and titanium for resistance to intergranular corrosion. One big advantage of the ATI 444 alloy over austenitic stainless steels, such as 304 and 316 alloys, is the practical immunity of the ATI 444 alloy to chloride stress corrosion cracking (SCC).