AUS 8/AUS 10
AUS-8 Steel is similar to 440 steel. It has Vanadium to give the steel more hardness. AUS-8a steel is very easy to sharpen to a razor edge but it will dull relatively quickly compared to high-carbon. Some reviewers online say that it’ll dull by just being out in oxygen. Others say that they have used it daily at work and only sharpen it once a week. The quality of the blade does depend a lot on use and tempering techniques from the manufacturer. AUS-8a will withstand rust very well. It is similar to 440 steel in this regard as well.