SAE ARP1820A-1997
Chord Method of Evaluating Surface Microstructural Characteristics

Standard No.

SAE ARP1820A-1997

Release Date

1997

Published By

Society of Automotive Engineers (SAE)

Status

Withdraw

Replace By

SAE ARP1820A-2002

Latest

SAE ARP1820C-2021

Scope

This practice provides a method of evaluting 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.

SAE ARP1820A-1997 history

• 2021 SAE ARP1820C-2021 Chord Method of Evaluating Surface Microstructural Characteristics
• 1970 SAE ARP1820C-2012 Chord Method of Evaluating Surface Microstructural Characteristics
• 2012 SAE ARP1820B-2012 Chord Method of Evaluating Surface Microstructural Characteristics
• 2007 SAE ARP1820B-2007 Chord Method of Evaluating Surface Microstructural Characteristics
• 2002 SAE ARP1820A-2002 Chord Method of Evaluating Surface Microstructural Characteristics
• 1997 SAE ARP1820A-1997 Chord Method of Evaluating Surface Microstructural Characteristics
• 1984 SAE ARP1820-1984 Chord Method of Evaluating Surface Microstructural Characteristics