Steel Mart manufactures Case Hardening Steels. Steel Mart is an ISO 9001-2000 certified company. Case Hardening is a simple method for hardening steel. This technique is used for steels with low carbon content. Carbon is added to the outer surface of the steel, to a depth of approximately 0.03mm. One advantage of this method of hardening steel is that the inner core is left untouched and so still processes properties such as flexibility and is still relatively soft.
Initially, the steel is heated to red heat. It may only be necessary to harden one part of the steel and so heat can be concentrated in this area. Then, the steel is removed from the brazing hearth with blacksmith`s tongs and plunged into case hardening compound and allowed to cool a little. The case hardening compound is high in carbon. Later, the steel is heated again to a red colour; removed from the brazing hearth and plunged into cold, clean water. The steel rod should now have a hardened outer surface and a flexible, soft interior. The process can be repeated to increase the depth of the hardened surface.
Below mentioned is some of the case of hardening steels:
Case Hardening Steels - Indian Products Directory