This site got the name wrong. It's called 'vantablack'. It's also not 'ten times stronger than steel' in the traditional sense, given that it's typical use is

This site got the name wrong. It's called 'vantablack'. It's also not 'ten times stronger than steel' in the traditional sense, given that it's typical use is going to be as a coating rather than a structural material. A microthin layer of vantablack may have greater tensile strength than a microthin layer of steel, but building girders of the stuff is infeasible.