my first picks

[skold]

HSS Can be soft or hard. HSS is made by the addition to materials such as tungsten (14-20%), molybdenum (6-9%) and chromium (1-6%) to molten carbon steel, the different percentages depend on whether the HSS is hard or soft/flexible, these blades also help when grinding as they have no need to be cooled, because these blades are made to cut faster and withstand more heat.

[Hojo]

Erm, HSS is not Soft, its just not a hard, and I think you should still keep it cooled, just in case, and so you learn to cool.