scope:

This specification establishes general requirements for the heat treatment of steel raw material (see 8.2.1) by producers or for producers.

This specification covers the requirements for furnace equipment, test procedures and information for heat-treating procedures, heat-treating temperatures, and material test procedures.

This specification describes procedures that will produce the desired properties and material qualities of the alloys covered herein. Alloys other than those specifically covered herein may be heat treated using all applicable requirements of this specification.

This document is intended to replace MIL-H-6875 (cancelled) and AMS-H-6875 (stabilized) for new design or when approved by the Cognizant Engineering Organization (CEO) on existing design. It is considered similar but not equivalent, as it does not cover parts (refer to AMS2759). Differences from AMS-H-6875 are a consequence of removing part application content.

Limitations

Unless otherwise specified, this specification is not applicable to heating or to intermediate (non-final) heat treatment, of raw material; e.g., hot working. This specification and the controls specified herein are applicable to capability heat treats required by material specifications to verify response to heat treatment. Processes not covered include deliberate surface heat-treating and specialized heat-treating, such as induction hardening, flame hardening, carburizing, and nitriding; however, this specification may be referenced for equipment and controls. Austempering, ausbay quenching, and martempering may be used when specified by the cognizant engineering organization.

Final heat treat condition as used in this specification is defined as the end item condition specified in the raw material specification or the purchase order.

Safety - Hazardous Materials

While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards that may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.