Patent ID: 8097099
Filing Date: 2012-01-17
Classification: C21D,C22C

Abstract:
1. A high toughness abrasion resistant steel with little change in hardness during use characterized by containing, by mass %, C: 0.21% to 0.30%, Si: 0.52% to 1.00%, Mn: over 0.45 to 0.64%, P: 0.02% or less, S: 0.005% or less, Cr: 0.1 to 2.0%, Mo: 0.1 to 1.0%, B: 0.0003 to 0.0030%, Al: 0.01 to 0.1%, and N: 0.01% or less, having a balance of unavoidable impurities and Fe, and furthermore having an ingredient with an M value defined by the following formula (1) of M: −10 to 16: