full hardness stainless steel

Full hard refer to the hardness of stainless steel. According to Leeb hardness, 1/4h mean the hardness of stainless steel is <210HV, 1/2H mean the hardness of stainless steel is between 270-290HV, 3/4H include the stainless steel with hardness 310-330HV, full hardness scope material with 370-390HV. 

The hardness mainly depend on requirement from customers, which is determined by material usage. This kind of material mainly used for washers or rolling usage.