Maraging steel

Abstract

Disclosed is a mar aging steel containing, in combination in mass percent, C in a content from greater than 0% to 0.02%, Mn in a content from greater than 0% to 0.3%, Si in a content from greater than 0% to 0.3%, Ni in a content of 10% to 13%, Mo in a content of 0.5% to 3.5%, Co in a content of 9% to 12%, Cr in a content of 1.5% to 4.5%, Ti in a content of 1.5% to 4.5%, and Al in a content of 0.01% to 0.2%, where the total content of Mo and Ti is 5.0 mass percent or less, and the ratio ([Mo]/[Ti]) of the Mo content [Mo] to the Ti content [Ti] is 1.0 or less, with the remainder consisting of iron and inevitable impurities.

1 . A maraging steel comprising, in mass percent:
 C in a content from greater than 0% to 0.02%;   Mn in a content from greater than 0% to 0.3%;   Si in a content from greater than 0% to 0.3%;   Ni in a content of 10% to 13%;   Mo in a content of 0.5% to 3.5%;   Co in a content of 9% to 12%;   Cr in a content of 1.5% to 4.5%;   Ti in a content of 1.5% to 4.5%; and   Al in a content of 0.01% to 0.2%,   a total content of Ti and Mo being 5.0% or less,   a ratio ([Mo]/[Ti]) of the Mo content [Mo] to the Ti content [Ti] being 1.0 or less, with the remainder consisting of iron and inevitable impurities.   
     
     
         2 . The maraging steel according to  claim 1 ,
 wherein the maraging steel has:   a phosphorus (P) content from greater than 0% to 0.01%;   a nitrogen (N) content from greater than 0% to 0.01%; and   a sulfur (S) content from greater than 0% to 0.01%,   where P, N, and S are present in the inevitable impurities.   
     
     
         3 . The maraging steel according to  claim 1 , wherein the maraging steel has a surface hardness in terms of Vickers hardness of 400 Hv or more. 
     
     
         4 . The maraging steel according to  claim 2 , wherein the maraging steel has a surface hardness in terms of Vickers hardness of 400 Hv or more.