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Standard

CHORD METHOD OF EVALUATING SURFACE MICROSTRUCTURAL CHARACTERISTICS

1984-10-01
HISTORICAL
ARP1820
This practice provides a method of evaluating microhardness and microstructure very close to the surface. It is useful for process control in heat treatment of steel parts to detect nitriding and carburization as well as decarburization and excessive intergranular oxidation. It also may be valuable for other evaluations, e.g., plated coatings and other materials.
Standard

Chord Method of Evaluating Surface Microstructural Characteristics

2007-12-19
CURRENT
ARP1820B
This practice provides a method of evaluating microhardness and microstructure very close to the surface of a disk specimen. It is useful for process control in heat treatment of steel parts to detect nitriding and carburization as well as decarburization and excessive intergranular oxidation. It also may be valuable for other evaluations, e.g., plated coatings and other materials.
Standard

Chord Method of Evaluating Surface Microstructural Characteristics

1997-03-01
HISTORICAL
ARP1820A
This practice provides a method of evaluating microhardness and microstructure very close to the surface of a disk specimen. It is useful for process control in heat treatment of steel parts to detect nitriding and carburization as well as decarburization and excessive intergranular oxidation. It also may be valuable for other evaluations, e.g., plated coatings and other materials.
Standard

Continuous Identification Marking of Iron and Steel Products

1998-12-01
HISTORICAL
AMSSTD183
This standard establishes uniform physical item identification marking in constantly recurring symbols for selected iron and steel products which are procured and issued for Government agencies. Shipment and inspection acceptance marking are not within the scope of this standard.
Standard

Control of Forgings Requiring First Article Approval

2017-07-10
CURRENT
AMS2375E
This specification covers procedures for obtaining first-article (preproduction) approval of forgings and the controls to be exercised in producing subsequent production forgings.
Standard

Heat Treatment of Carbon and Low-Alloy Steel Parts Minimum Tensile Strength Below 220 ksi (1517 MPa)

2019-09-19
CURRENT
AMS2759/1H
This specification, in conjunction with the general requirements for steel heat treatment covered in AMS2759, establishes the requirements for heat treatment of carbon and low-alloy steel parts to minimum ultimate tensile strengths below 220 ksi (1517 MPa). Parts are defined in AMS2759. Due to limited hardenability in these materials, there are size limits in this specification.
Standard

Heat Treatment of Carbon and Low-Alloy Steel Parts Minimum Tensile Strength Below 220 ksi (1517 MPa)

2018-04-28
HISTORICAL
AMS2759/1F
This specification, in conjunction with the general requirements for steel heat treatment covered in AMS2759, establishes the requirements for heat treatment of carbon and low-alloy steel parts to minimum ultimate tensile strengths below 220 ksi (1517 MPa). Parts are defined in AMS2759. Due to limited hardenability in these materials, there are size limits in this specification.
Standard

Heat Treatment of Steel Raw Materials

2020-07-08
CURRENT
AMS2761
This specification establishes general requirements for the heat treatment of steel raw material (see 8.2.1) by producers or for producers.
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