Steel is actually iron that was smelted at much higher temperatures than normally (usually with a blast furnace). This extreme heat that is added removes many more impurities, actually making it denser and harder than usual iron.
A nail made of steel.
Iron and steel are a type of metal (a Solid)
Iron is the pure element, mild steel, or any steel is iron with a little bit of carbon added. The iron becomes mild steel, steel or any other type of steel depending on how much carbon is added to the iron.
Steel Iron carbide or just plain carbide.
iron
An iron plow is made of iron, which is a softer metal compared to steel. A steel plow is made of steel, a stronger and more durable material than iron. Steel plows are generally more effective for breaking up tough or rocky soil compared to iron plows.
carbon steel is the the type of knoves they use usually on iron chef.
Iron (Iron is the only pure metal that rusts, all other metals corrode)
Steel is very resistant to corrosion. It is hard and strong. It is resistant to stretching, depending on the type of steel; low-alloy steel and nickel steel. Steel is maleable, but not 'soft' like pure iron, iron is much more useful when in the form of steel. Pure iron is weak, too soft to be used in construction or for any building purposes.
The RFM of steel varies dependent upon the levels of differing impurities which give each specific type of steel its desired properties. You need to be more specific in you question. Which type of steel?
The metal type and quality.
That depends on the type of stainless; it will vary betwen 65-80% iron