Alloy G30

Last updated: November 16, 2016

What Does Alloy G30 Mean?

The chemical composition of Alloy G30 is 43Ni – 30Cr – 6Mo – 2.5W – 15Fe – Cu – Cb. This alloy is also considered to be the high chromium nickel base alloy or super alloy that provides better chemical corrosion resistance compared to other iron and nickel based alloys. It provides excellent resistance to oxidizing acids such as nitric, hydrochloric and sulfuric acids.

Alloy G30 is also known as Hastelloy G-30.


Corrosionpedia Explains Alloy G30

Industrial nomenclature or the recommended grade for Alloy G30 is W.NR 2.4603, UNS N06030, AWS 056.

Alloy G30 is used in complex industrial structures where there are chances of grain boundary precipitates forming in the welded heat zones. Therefore, this super alloy is the best fit for welding as it provides superior ductility to the metal.

Some typical applications of Alloy G30 are:

  • Phosphoric acid plants
  • Sulfuric acid plants
  • Nitric acid plants
  • Complexes where nuclear fuel and nuclear waste is reprocessed
  • Petrochemical industry
  • Fertilizer manufacturing industry
  • Gold ore extraction

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