Corrosion resistant materials can be divided into non-metallic materials and metallic materials according to their properties.

In the 1970s and 1980s, corrosion-resistant alloys improved again and began to be specially optimized for different environments. Hastelloy® B-2 alloy is improved on the basis of B alloy, but it is a corrosion resistant alloy for reducing environment. It has excellent corrosion resistance, but poor workability. Although C-276 is a great success, the performance of its welded area is still not ideal. The appearance of Hastelloy C-22 not only solves this problem but also achieves better corrosion resistance in most cases. Hastelloy® G-3, G-30® alloys have been introduced in the antioxidant environment, they are excellent in strong oxidation or mixed acid environment. In terms of superalloy, the invention of Haynes® 230 alloy not only made progress in aerospace industry, but also promoted the progress of Chemical industry with its excellent high temperature strength and oxidation resistance, and won the "Chemical Processing" award
In the 1990s, the invention of Hastelloy® B-3® completely changed the shortcoming of B-2 which is easy to precipitate Ni-Mo precipitate phase at intermediate temperature, resulting in precipitation, and the processing performance was greatly improved. In order to further expand the application range of C-series alloys, the addition of copper to Hastelloy® C-2000® greatly extends the corrosion resistance of C-2000® in reducing environments, especially sulfuric acid and hydrofluoric acid. Although the new Hastelloy® G-35® alloy belongs to G series, but it is a kind of nickel-chromium-molybdenum alloy in nature, the composition is closer to C series alloy. It is only because its invention is still designed for strong oxidation and mixed acid environments that the commercial brand remains in the G series.