State the major difference between the composition of steel and stainless steel. Why is stainless steel considered better than steel?
Carbon steel is composed of iron and 0.12 - 2.00 percent carbon. The broader definition includes alloy steels, which can also contain up to 10.5 percent alloy content. Even within the confines of under two percentage points of carbon, there is huge variance in physical characteristics—especially hardness.
Stainless SteelStainless steel contains iron, carbon, and at least 10.5% chromium content. The chromium is key—it reacts with oxygen to create a passive layer that protects the steel from corrosion. That protection allows stainless steels to function in wet environments without rusting. The higher the chromium content, the better the corrosion resistance.