Nitralloy 135 Modified, Alloy 135 Modified, Nit.135 Mod.


Nitralloy 135 Modified, as it is commonly known, is a low alloy nitriding steel grade with moderate hardenability. It was designed to provide a high case hardness and maintain its core strength during nitriding. VAC-ARC and VIM-VAR melting procedures tend to yield the most preferred ingot solidification, as well as superior cleanliness.


Aircraft applications, including gears, crankshafts, cams and bolts.


AMS 6470, 6471, 6472; AMS-S-6709
ASTM A-355, A-519, A-646
UNS K24064

Available Forms

  • Bar
  • Forge