Hastelloy C276 tubing possesses features that make it versatile for use in different industries. Made from nickel, chromium, molybdenum, tungsten, and cobalt among other metals, this alloy’s features are just as versatile as the metals that make it up. Corrosion resistance is among the top features that make this alloy appropriate for different applications. Here are the features of C276.
Hastelloy C276 tubing is referred to as universally resistant to corrosion. This is because it can withstand various environments. Whether it is a moderately oxidizing environment or a strong reducing one, the alloy will remain unchanged. Many alloys are resistant to just a few acids, but this one can resist hydrochloric acid, acetic acid, sulphuric acid, formic acid as well as chlorine solutions, and chlorine gas. It only proves vulnerable when exposed to hot concentrated nitric acid. This is because it has a low composition of chromium. When introduced to seawater, the alloy still proves resistant to corrosion. This makes it appropriate for applications that would involve submersion in seawater.
With the right directions followed, this alloy can be easily formed with different hot and cold working processes. Its nickel composition makes it harden quickly yet it can be aggressively cold-formed using methods such as punching, deep drawing, and press forming. It is recommended that hot forming is done between 870°C and 1230°C while heavier sections need to be heated to a minimum of 1093°C. it is advised, however, that annealing be carried out after the material has been worked. The recommended temperature for this would be between 2050 and 2150°F. Fabrication of this metal is much easier than so many others with fewer risks involved.
Of all the nickel alloys that contain molybdenum, C270 alloy has one of the best weldability features. Whether it is used as a filler or it is welded using other metals, it forms a corrosion-resistant area. Unlike any other alloys which become vulnerable after welding, this one does not. As long as you follow the directions for welding, there should be no risk of cracks forming. This is because it has low carbon content and thus reduces the grain boundary carbide precipitation
Stress Corrosion Resistance
Nickel alloys have a level of resistance to stress corrosion, however, if the condition exceeds a certain level, they begin cracking. This is not the case with C270. The alloy when put to the test shows no signs of cracking.
With the properties mentioned above, Hastelloy is appropriate for use in the following applications:
– Industries that deal with highly acidic solutions like chemical waste treatment plants as well as pharmaceutical manufacturing.
– Offshore oil mining that need to feed pipes deep into salty water. The material can be used for pipes as well as fittings, bolts, and other accessories.
– Construction engineering especially for structures that will be near highly corrosive environments.
– Industries that have processes that involve high temperatures like in heat exchangers, evaporators, and stack gas reheaters.
Versatility is not a property many alloys posses since most are created for specific purposes. C276 however can be used in various applications.