Knife Steel The Making & Shaping of Steel Steel is essentially a combination of iron and carbon. All steels contain certain other elements in small controlled amounts, like Manganese, Sulfur, Silicon, and Phosphorus. If nothing else is present, the steel is referred to as plain carbon steel. Steels used for knife blades are enhanced with additional elements and are called alloy steels. It is these additions that give different types of steel their special properties. Alloy st