Generally we can say, that hardness of heat treated steels correlates with yield stress and the ultimate tensile strength. (YS is stress when steel starts to deform plastically. UTS is the maximum stress steel can take, but also a measure of fracture energy necessary to break steel in a tensile test.)
The already quoted prof. Foell says: ”What is commonly known as "hardness" is nothing more than the yield stress, just measured in different units”.
Jan
The already quoted prof. Foell says: ”What is commonly known as "hardness" is nothing more than the yield stress, just measured in different units”.
Jan