Improvements to creep resisting boron steels

摘要

A creep resistant boron steel containing:- .C.0.03-0.15% .Ni.9-16% .Cr.15-20% .either Ti.0.3-2.5% .or Nb.0.5-4.0% .B.0.001-0.1% the balance being iron, is characterized in that one or more of the following limits is applied to the above ranges:- .C.0.12-0.15% .Ni.14-16% .Cr.15-16% or 19-20% .Ti.0.7-2.5% .Nb.1.2-4.0% .B.0.01-0.1%