| H-F Carbonitrided (16- Prefix) The Carbonitrided barrel is made from a low carbon steel that is carbonitrided on the inside surface only to increase the carbon content. It is then induction hardened on the inside surface to achieve a surface hardness of HRC 60 minimum for .005" depth per side and precision honed and threaded. The core and outside surface still retain their lower hardness, strength, ductility, and corrosion resistance. An advantage of the H-F Carbonitrided barrel is that it is not a coating which can flake off. It is a treatment of the barrel's inside surface that can only wear off, since the inside hard material treatment is an integral part of the barrel. It is recommended for moderate or severe abrasion in mild to moderate corrosive environments. The minimum yield strength is 75,000 psi. |
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