Patent ID: 8580048
Filing Date: 2013-11-12
Classification: C21D,C22C,F16J

Abstract:
1. A piston ring having a cast steel material composition as the basic element, wherein the steel material composition consists of the following elements in the proportions indicated relative to 100% by weight of the steel material composition: C: 0.5-1.2% by weight Cr: 6.0-20.0% by weight Mn: 4.0-15.0% by weight Si: 2.0-10.0% by weight Al: max. 0.02% by weight B: max. 0.1% by weight Cu: max. 2.0% by weight Mo: max. 3.0% by weight Nb: max. 0.05% by weight Ni: max. 2.0% by weight P: max. 0.1% by weight S: max. 0.05% by weight Sn: max. 0.05% by weight Ti: max. 1.5% by weight V: max. 1.5% by weight W: max. 1.5% by weight wherein the total of the fractions of Nb, Ti, V and W is equal to not more than 1.5% by weight, and Fe is the remainder.