The difference between ferrous and non-ferrous metals is that ferrous metals contain iron and non-ferrous metals do not. This basic difference imparts distinctive properties on the two types of metals, which add to their own personal physical properties and determine the applications they are most suited for.
Bolts can be either ferrous or non-ferrous, meaning that they either contain iron (ferrous) or don't contain iron (non-ferrous). So what's the difference between the two, and what are the characteristics of each? Obviously, the biggest difference is that ferrous bolts contain iron, while non-ferrous bolts do not.