Description
HASTALLOY - C4
A highly versatile Ni-Cr-Mo alloy with extremely high resistance to HAZ sensitization and oxidative degradation. The nickel-chromium-molybdenum alloy HASTELLOY® C-4 (UNS N06455) is the most (microstructurally) stable of the widely used nickel-chromium-molybdenum materials, which are well known for their resistance to a wide range of aggressive chemicals, including hydrochloric acid, sulfuric acid, and chlorides, among others.
As a result of this stability, the alloy can be welded without fear of sensitization, which is the formation and growth of harmful second-phase precipitates in the grain boundaries of the weld heat-affected zone (HAZ).As with other nickel alloys, it can be made into different shapes and welded together, and it's very resistant to stress corrosion cracking in chloride-containing water (a form of degradation to which the austenitic stainless steels are prone). Chrome and molybdenum make it resistant to both oxidising and non-oxidizing acids. It also resists pitting and crevice attack in the presence of chlorides and other halides because it has a lot of these. 2.4610 is very resistant to many different types of chemical media because it is made of chromium and molybdenum. This makes it very resistant to a lot of different types of chemical media, like organic and inorganic chloride-contaminated media. This is because the alloy C4 has a unique chemical composition. It has good structural stability and is very resistant to being broken.
