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【范围】
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1.1 Scope
This specification covers the requirements for heat-treatment of four classes of steel (See 1.2) and the requirements for
furnace equipment, test procedures and information for heat-treating procedures, heat-treating temperatures and material
(See 6.3) test procedures. This specification is applicable only to the heat treatment of raw material (See 6.3.1); it does
not cover the requirements for the heat treatment of steel parts (See 3.4 and 6.3.2). This specification also describes
procedures that, when followed, will produce the desired properties and material qualities within the limitations of the
respective alloys tabulated in Tables 1A, 1B, 1C and 1D. Alloys other than those specifically covered herein may be heat
treated using all applicable requirements of this specification.
1.1.1 Limitations
Unless otherwise specified, this specification is not applicable to heating or to intermediate (non-final) heat treatment, of
raw material, e.g., for hot working. Processes not covered include deliberate surface heat-treating and specialized heat-
treating, such as induction hardening, flame hardening, carburizing, 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.
1.2 Classification
Steels covered by this specification are classified into the following four classes. Unless otherwise specified, the process
and equipment requirements in this specification refer to all classes of steel tabulated in Tables 1A, 1B, 1C, and 1D,
respectively.
Class A - Carbon and low alloy steel
Class B - Martensitic corrosion-resistant steel
Class C - Austenitic corrosion-resistant steel
Class D - Precipitation-hardening and maraging steelstrRefField
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