Stainless Steel Sheet/Plate 301 Quarter Hard is normally used for aerospace, automotive, architectural, ornamental, industrial, and food and beverage applications. 301 provides high strength, high ductility, and excellent corrosion resistance. 301 1/4 Hard Sheet/Plate has a Rockwell Hardness of 25 HRC or greater (if under, product is acceptable if tensile properties of 125 KSI is met) and a minimum Yield Strength of 75 KSI. This material meets the following specifications: AMS 5517 and ASTM A666. Domestic melt & manufacture / Full traceability available.