The term 'bronze or steel' refers to an ALLOY, which is a combination of two or more metals. Alloys are often used in the production of metal products because they can be tailored to have specific properties that make them more suitable for certain applications. Bronze and steel are two of the most common alloys used in manufacturing, as they are both strong and durable. Bronze is an ALLOY of copper and tin, while steel is an ALLOY of iron and carbon. Both alloys are used in a variety of applications, from construction to automotive parts.