Nitralloy

Nitralloy

 

the generic name of a group of structural steels used to manufacture nitrided parts. The main alloying elements of nitralloys are aluminum, chromium, molybdenum, and vanadium, which form fine-crystalline hard nitrides that impart a high hardness (Vickers hardness, up to 1200) and wear resistance to the nitrided surface layer. The most common nitralloys in the USSR are 38KhMIuA and 38KhIu steels. Type 38KhMIuA steel, which is used in the manufacture of critical parts, contains 0.15–0.25 percent molybdenum, in addition to aluminum and chromium. The molybdenum increases hardenability, moderately improves the ultimate strength of the core of the part, and prevents the development of temper brittleness during nitriding.

References in periodicals archive ?
Steve Clement, grinding supervisor, cites a common example: "We grind a nitralloy aerospace part with six different diameters plus three flats.
Materials are Nitralloy, 52100, 440C, 4340 and 15-5 stainless.
Standard base material is 4140 heat treated steel, with available options including 4340 heat treated steel, Nitralloy 135M and all grades of stainless steel.
Barrels are available in such materials as Nitralloy 135-nitrided, tool steels, D-2, CPM-10V, CPMT-440V, iron boron (bimetallic), carbide (bimetallic) and nickel (bimetallic).
Other metals that exhibit toughness such as Inconel, Monel, Hastelloy, Nitralloy, Waspaloy, Nimonic, and Udimet benefit because EDM is a noncontact process and there is no adhesion of workpiece to the tool.
Materials are mostly Nitralloy Cr/Mo/Al steels, tough and very prone to work hardening, as well as cast iron parts.
and molds made of hardened steels, tungsten carbide, high-speed steel, and exotic materials like Hastelloy, Nitralloy, Waspaloy, and Nimonic, used in aeronautical and aerospace applications.
Trial installations have produced cost and time savings that have led a major automaker to switch 60% of its drill bushing to the Nitralloy bushings.