The density of steel varies depending on the type of steel. Plain steel has a density of around 7.85 g/cm³ or 7850 kg/m³. Carbon steel has a density of about 7.84 g/cm³. Stainless steel, which contains at least 10.5% chromium, has a density of about 8.03 g/cm³. The density of steel is expressed in different units such as g/cm³, kg/m³, kg/L, or lb/in³, with kg/m³ being the most commonly used. The density of steel is an important factor to consider in industrial applications, as it affects the strength, hardness, and malleability of the material produced.