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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

Chemical Check Analysis Limits Wrought Low-Alloy and Carbon Steels

1998-10-01
HISTORICAL
AMS2259C
This specification defines limits of variation for determining acceptability of the chemical composition of wrought low-alloy and carbon steel parts and material acquired from a producer. Check analysis limits for elements or for ranges of elements not listed herein shall be as specified in the applicable material specification or as agreed upon by purchaser and vendor.
Standard

Chemical Check Analysis Limits Wrought Low-Alloy and Carbon Steels

2003-12-10
HISTORICAL
AMS2259D
This specification defines limits of variation for determining acceptability of the chemical composition of wrought low-alloy and carbon steel parts and material acquired from a producer. Check analysis limits for elements or for ranges of elements not listed herein shall be as specified in the applicable material specification or as agreed upon by purchaser and vendor.
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

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.
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