Hastelloy G-35

Description:

Hastelloy G-35 (UNS N06035 / W.Nr. 2.4643) is a nickel-chromium-molybdenum alloy designed to resist “wet process” phosphoric acid, which is used in the production of fertilizers. Similar to Hastelloy G-30, Hastelloy G-35 alloy also has excellent resistance to localized attack in the presence of chlorides, since this can be a problem beneath deposits in evaporators used to concentrate “wet process” phosphoric acid. Besides, it is much less susceptible to chloride--induced stress corrosion cracking than the stainless steels and nickel--chromium--iron alloys traditionally used in “wet process” phosphoric acid.

Due to the high chromium content, Hastelloy G-35 is extremely resistant to other oxidizing acids, such as nitric, and mixtures containing nitric acid. It possesses moderate resistance to reducing acids, as a result of its appreciable molybdenum content and unlike other Ni-Cr-Mo alloys, it is very resistant to “caustic de-alloying” in hot sodium hydroxide.

Features:

Excellent resistance to chloride pitting and creative corrosion cracking

Immune to chloride ion stress corrosion

Maintains high strength at elevated temperatures

Resistant to sea water, in both flowing and stagnant condition

Heat resistant

Applications:

Marine engineering

Furnace & gas turbines

Chemical processing involving phosphoric acid, sulfuric acid and nitric acid

Nuclear fuel reprocessing, nuclear waste processing

Pickling operations

Petrochemical

Fertilizer manufacture

Pesticide manufacture

Gold ore extraction

Specifications

Chemical Compositions of Hastelloy G-35 Nickel Alloy

Typical Physical and Mechanical Properties (RT, Solution annealed)

Product Forms and Standards