hastelloy pipe

HASTELLOY B-3 alloy (UNS N10675) is an excellent resistance alloy to hydrochloric acid at all concentrations and temperatures. It also withstands sulfuric, acetic, formic and phosphoric acids, and other nonoxidizing media. B-3 alloy has a special chemistry designed to achieve a level of thermal stability greatly superior to that of its predecessors, e.g. HASTELLOY B-2 alloy. B-3 alloy has excellent resistance to pitting corrosion, to stress-corrosion cracking and to knife-line and heat-affected zone attack.

It is used in flue gas desulfurization systems because of its excellent resistance to sulfur compounds and chloride ions encounted in most scrubbers. C-276 alloy has excellent resistance to pitting and to stress-corrosion cracking. It is also one of the few materials that withstands the corrosive effects of wet chlorine gas, hypochlorite, and chlorine dioxide.

Hastelloy C-22 has exceptional resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, hot contaminated media (organic and inorganic), chlorine, formic and acetic acids, acetic anhydride, and seawater amd brine solutions.

Alloy C 276 (UNS N10276/ 2.4819) is known for its corrosion resistance in a variety of corrosive media. The high molybdenum content imparts resistance to localized corrosion such as pitting. Low carbon minimizes carbide precipitation during welding to maintain the resistance of the welded joint heat affected zone to intergranular erosion. It is used in chemical processing, pollution control, pulp and paper, industrial and municipal waste treatment, and recovery of “sour” natural gas. Applications in air pollution control include stack liners, ducts, dampers, scrubbers, stack gas reheaters, fans and fan guards. In chemical processing, the alloy is used to make components such as heat exchangers, reaction vessels, evaporators and transfer piping.

ASTM B619 UNS N10276 Alloy C276 Tube covers 2 classes under this specification. In class 1, the Hastelloy C276 Tube is furnished in an as welded and solution annealed condition or these tubes could be welded along with being sized and solution annealed.

On the other hand, the class 2 Hastelloy C276 Welded Tubing produced according to the ASTM B619 specification is welded, cold worked and is furnished in a solution annealed condition.

Alloy B2 Tubes, which has poor corrosion resistance to oxidizing environments. Hastelloy B2 Seamless Tubes is a solid solution strengthened, nickel ¨C molybdenum alloy, with significant resistance to reducing environments like hydrogen chloride gas, and sulphuric, acetic and phosphoric acids. Molybdenum in Hastelloy B2 Welded Tubes is the primary alloying element which provides significant corrosion resistance to reducing environments.

Hastelloy X Alloy is a nickel-chromium-iron-molybdenum superalloy with outstanding high temperature strength, oxidation resistance, and fabricability. The oxidation resistance of Alloy X is excellent up to 2200¡ã F.