Why are properties of steel not identical?
Grade 440C is one of the highest strength stainless steels. It is also very wear resistant. Good for use as ball bearings and other high wear applications. 400C has the highest carbon content of the 440 steels. 440A and 440B are identical but have lower carbon contents and have lower strengths and higher corrosion.
Steel is manufactured to different specs. To match the needs of its intended end use .Tensel strength,Hardness, Corosion resistance etc. The chemical make up will change to suit.
