7Cr17MoV Steel Composition. Carbon C 0.75%: Increases edge retention, hardness, and tensile strength. It also improves steel resistance to wear, abrasion, and corrosion. The .7% Carbon content gives the 7Cr17MoV its characteristic name starting with 7. Chromium Cr 18.00%: More than 11% of Chromium is what makes 7Cr17MoV …