Manganese is a silver-gray metal, much like iron, but softer than iron. If manganese contains a small amount of impurities-carbon or silicon, it becomes very hard and brittle. However, pure metallic manganese is not very widely used because it is more rusty than iron. In humid air, it becomes gray and loses its luster in a short while-a layer of manganese oxide is formed on the surface.

1.To be used as double deoxidizer in steel making

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