No, diamond concrete blades are not designed to cut steel. Diamond blades are designed to cut through hard materials such as concrete, brick, stone, and asphalt. Steel is a much softer material than these, and the diamond blade would not be able to cut through it. Steel requires a different type of blade, such as a carbide-tipped blade, which is specifically designed to cut through steel. Carbide-tipped blades are much harder than diamond blades and can withstand the pressure and heat generated when cutting through steel. Additionally, diamond blades are not designed to be used with power tools, as the heat generated by the power tool can damage the diamond blade. Therefore, diamond concrete blades should not be used to cut steel.