Most versatile, corrosion resistant alloy with excellent resistance to uniform corrosion in oxidizing or reducing environments. Excellent resistance to stress corrosion cracking and superior resistance to localized corrosion. Grades as under:- Hastelloy C-4 (UNS No N06455)., Hastelloy C 276 (UNS No. N10276), Hastelloy C 22 (UNS No. N06022), Hastelloy C 2000 ASTM : B622, B619, B622, B626, B575, B574, B564,B366