Hastelloy C276 wire- Extensive use in chemical process industries
Hastelloy C276 wire has high resistance in various corrosive media & is especially resistant to pitting & crevice corrosion.
Main features of Hastelloy C276 wire making it widely useful are
- Suitable for sea water applications.
- High corrosion resistance in various corrosive media such as chloride ions & sulphur compounds.
- Resists the corrosive effects of wet chlorine gas, hypochlorite & chlorine dioxide.
- High resistance to crevice corrosion, pitting & stress corrosion cracking.
Main applications of Hastelloy C276 wire are
- Chemical processing
- Pulp and paper production
- Pollution control
- Marine engineering
- Waste treatment
Hastelloy C276 alloy is ductile & has high resistance to stress corrosion cracking in chloride-bearing solutions. This alloy is easy to form & weld and can withstand oxidizing & non-oxidizing acids due to its high chromium & molybdenum content. This alloy also has high resistance to pitting & crevice attack in the presence of chlorides & other halides due to its high chromium & molybdenum content. In addition to this, it is highly resistant to sulfide stress cracking & stress corrosion cracking in sour oilfield environments. This alloy is available in various forms such as sheets, billets, pipes, covered electrodes, plates, strips, bars, wires & tubes. Uses of Hastelloy C276 alloy in chemical process industries include various applications such as heat exchangers, reactors & columns.
Hastelloy C276 alloy has resistance to grain-boundary precipitates in the weld heat-affected zone making it suitable for many chemical process applications in the as-welded condition. This alloy is an improved wrought version of alloy C as it doesn’t need to be solution heat-treated after welding and has improved fabricability. This alloy has high resistance to oxidizing & reducing media. This alloy also has resistance to localized corrosion. Hastelloy C276 alloy can be used in multipurpose plants or where upset conditions can occur due to its versatility. This alloy has high resistance to various chemical process environments such as ferric & cupric chlorides, chlorine, acetic anhydride, brine solutions, hot contaminated media (organic & inorganic), acetic acids, seawater & formic acids. Hastelloy C276 alloy has resistance to sulfur compounds & chloride ions encountered in many scrubbers, therefore, it is used in flue gas desulfurization systems.
Hastelloy C276 alloy can be forged, hot-upset & impact extruded. This alloy tends to work-harden however, it can be successfully spun, punched, deep-drawn or press formed. Common ways of welding can be used to weld this alloy however, the oxyacetylene & submerged arc processes are not recommended when the fabricated item is intended for use in corrosion service. Special precautions should be taken to avoid excessive heat input.
Wrought forms of Hastelloy C276 alloy are furnished in the solution heat-treated condition unless otherwise specified. This alloy is normally solution heat-treated at 2050°F & rapid quenched. Parts that have been hot-formed should be solution heat-treated prior to final fabrication or installation.