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Standard

Residual Stress Measurement and Classification, Metallic Structural Alloy Products and Finished Parts
2023-05-22
CURRENT
AS7045
The purpose of this standard is to provide uniform methods for defining, quantifying, and classifying the residual stress in metallic structural alloy products and finished parts. These stresses may exist within a single element, or they may be the result of a joining process. Such quantification and classification may be required when residual stresses within mill stock or preforms can impact further in-process distortion during machining or other processes, and when residual stresses within finished components can impact final mechanical properties and performance (especially strength, durability, and fracture performance).
Standard

The Chemical Milling Process
2021-07-15
CURRENT
ARP1331C
This practice provides recommendations concerning the chemical milling of aluminum, magnesium, high temperature nickel alloys, titanium alloys, copper alloys, and specialty alloys.
Standard

Application of Tungsten Carbide Coatings on Ultra High Strength Steels High Velocity Oxygen / Fuel Process
2020-12-10
CURRENT
AMS2448C
This specification covers engineering requirements for applying tungsten carbide thermal spray coatings to ultra-high strength steels (220 ksi and above) utilizing high velocity oxygen fuel (HVOF) combustion driven processes and the properties for such coatings. The processes and procedures herein apply only to the properties of the as-deposited coating.
Standard

Molybdenum Disulfide, Technical, Lubrication Grade
2017-09-22
CURRENT
AMSM7866B
This specification covers the requirements for procurement of one grade of powdered molybendum disulfide to be used in lubricants and greases for surfaces where boundary conditions exist.
Standard

Instrumental Methods of Determining Surface Cleanliness
2017-09-20
CURRENT
ARP4252B
This Aerospace Recommended Practice is intended as a guide toward standard practices for the determination of surface cleanliness that are applicable to field operation. Some of these methods can also be used to determine quality assurance that a surface has been properly prepared and maintained. The instrumental methods are: Wettability, Surface Potential Difference (SPD), Ellipsometry, and Optically Stimulated Electron Emission (OSEE). Each instrument is described with respect to measurement techniques, limitations, and advantages and types of available instruments. Elementary theoretical principles and examples of the use of each instrument are also given.
Standard

Instrumental Methods of Determining Surface Cleanliness
2017-01-04
HISTORICAL
ARP4252A
This Aerospace Recommended Practice is intended as a guide toward standard practices for the determination of surface cleanliness that are applicable to field operation. Some of these methods can also be used to determine quality assurance that a surface has been properly prepared and maintained. The instrumental methods are: Wettability, Surface Potential Difference (SPD), Ellipsometry, and Optically Stimulated Electron Emission (OSEE). Each instrument is described with respect to measurement techniques, limitations, and advantages and types of available instruments. Elementary theoretical principles and examples of the use of each instrument are also given.
Standard

Molybdenum Disulfide, Technical, Lubrication Grade
2011-11-21
HISTORICAL
AMSM7866A
This specification covers the requirements for procurement of one grade of powdered molybendum disulfide to be used in lubricants and greases for surfaces where boundary conditions exist.
Standard

Ion Nitriding
2007-06-27
HISTORICAL
AMS2759/8A
This specification establishes the requirements and procedures for producing a hard, wear resistant ion nitrided surface on steel parts.
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