What is Hastelloy?
Hastelloy is a nickel-based corrosion-resistant alloy, mainly divided into two categories: nickel-chromium alloy and nickel-chromium-molybdenum alloy. Hastelloy has good corrosion resistance and thermal stability, and is mostly used in aviation, chemical fields, etc.
Hastelloy alloy is the collective name for the commercial grades of nickel-based corrosion-resistant alloys produced by Hastelloy International Corporation of the United States. Including nickel-molybdenum series Hastelloy B-2, nickel-chromium-molybdenum series Hastelloy C-4, etc.
What are the properties of Hastelloy?
① In both oxidizing and reducing atmospheres, it has excellent corrosion resistance to most corrosive media.
② Excellent resistance to pitting corrosion, crevice corrosion and stress cracking corrosion.
What are the classifications of Hastelloy?
Hastelloyalloy is currently mainly divided into three series: B, C, and G. It is mainly used in highly corrosive media situations where iron-based Cr-Ni or Cr-Ni-Mo stainless steel, non-metallic materials, etc. cannot be used. In order to improve the corrosion resistance and cold and hot working properties of Hastelloy, Hastelloy has made three major improvements in its development process.
The most widely used ones at present are the second generation materials N10665(B-2), N10276(C-276), N06022(C-22), N06455(C-4) and N06985(G-3)
What are the chemical compositions of Hastelloy?
Element Ni Cr Fe C Mn Si Cu Mo Co P S
Minimum margin 0.4 1.6 26.0 Maximum
1.0 2.0 0.01 1.0 0.08 0.5 30.0 1.0 0.02 0.010
What are the uses of Hastelloy?
Hastelloy plates are suitable for various chemical industries containing oxidizing and reducing media. The higher molybdenum and chromium content makes the alloy resistant to chloride ion corrosion, and the tungsten element further improves the corrosion resistance. At the same time, C-276 Hastelloy pipe is one of the only materials that is resistant to corrosion by moist chlorine, hypochlorite and chlorine dioxide solutions, and is resistant to high-concentration chloride solutions such as ferric chloride and copper chloride. Remarkable corrosion resistance.
Application areas: heat exchangers, bellows compensators, chemical equipment, flue gas desulfurization and denitrification, paper industry, aerospace applications, acidic environment.
