This specification defines the requirements for locally hardening steel parts by the induction hardening method.

Application

This procedure has been used typically to harden local areas of parts without heating the entire part to hardening temperatures or to harden a local area of a part to a higher hardness than surrounding areas for increased wear or strength, often at the expense of other characteristics such as toughness, but usage is not limited to such applications.

Classification

Induction hardened parts are classified as follows:

Class 1 - High Integrity or Critical

Class 2 - Structural Quality

Class 3 - Wear Resistance

When a class is not specified, Class 2 shall be supplied.