Patent ID: 8506727
Filing Date: 2013-08-13
Classification: C22C

Abstract:
1. A piston ring, including a cast steel material composition as the basic element thereof, 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: 0.2-20.0% by weight Fe: 49.0-97.1% by weight Mn: 0.1-3.0% by weight Mo: 0.1-3.0% by weight Nb: 0.0-7.0% by weight Si: 3.0-10.0% by weight Ti: 0.0-7.0% by weight V: 0.0-7.0% by weight W: 0.0-0.5% by weight B: max. 0.5% by weight Cu: max. 2.0% by weight Ni: max. 4.0% by weight P: max. 0.1% by weight Pb: max. 0.05% by weight S: max. 0.05% by weight Sn: 0.001-0.05% by weight wherein the sum of the fractions of Nb, Ti, V and W is from 2.0 to 7.0% by weight.