As a leading Chinese Hastelloy alloy supplier, AEETHER manufactures and produces different sizes of Hastelloy Alloy C-4 pipes. HASTELLOY® C-4 alloy (UNS N06455) is the most (microstructurally) stable of the widely used nickel-chromium-molybdenum materials, which are well known for their resistance to many aggressive chemicals, in particular hydrochloric acid, sulfuric acid, and chlorides.