nickel steel

from WordNet (r) 3.0 (2006)

nickel steel
    n 1: an alloy steel containing nickel

from The Collaborative International Dictionary of English v.0.48

Nickel steel \Nickel steel\
   A kind of cast steel containing nickel, which greatly
   increases its strength. It is used for armor plate, bicycle
   tubing, propeller shafts, etc.
   [Webster 1913 Suppl.]