How to Differentiate Among Cast Iron and Mild Steel?

[JestJester]

Those are quite good points! Another way to differentiate among cast steely and mild steel is through their mass and density. Cast steely is denser and heavier than mild steel, so if you have two similar-sized objects and a feels substantially heavier, it's probable cast steely. Additionally, you can complete a spark verify – when grinding each material, cast iron produces short, discontinuous sparks, while mild steel generates longer, constant sparks.