440c ss mat l balls hardness 52 55 rc

    Type 316/316L Stainless Steels Explained,  · Annealing (a treatment to reduce hardness and increase ductility, or the ability to accept plastic deformation) 316 and 316L stainless steels require heat treatment of between 1,900 and 2,100 degrees Fahrenheit (1,038 to 1,149 degrees Celsius) before rapidly ...Orthopedic Applications,  · A decade later stainless steel metal spheres termed Fernström balls (Fig. were used in 103 patients starting in 1969 (McKenzie Alvin, 1995, Fernstrom, 1966). Others clinicians around the same time tried using polymer balls made of polymethyl).