ASTM B564 UNS N04400 Monel 400 flange Wnr 2.4360 nickel alloy Flange
Another important characteristic of Monel 400 Blind Flange is its resistance to halides or halogen containing solutions.
Though it is best known for its resistance to sea water, Monel 400 flanges also show good resistance reducing media. It also resists oxidizing media better than many alloys with higher copper content. It is not recommended to use the alloy in environments that contain solutions of ammonia or nitric acid. This is because both these solutions rapidly disintegrate the Monel 400 Blind Flange due to its copper chemistry. When it comes to acids, Monel 400 flanges offer very good protection from hydrofluoric acid in all concentrations up to the boiling point, as well as decent protection to sulfuric and hydrochloric acids under reducing conditions.