ASTM-B931 › Standard Test Method for Metallographically Estimating the Observed Case Depth of Ferrous Powder Metallurgy (PM) Parts
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Scope
1.1 A metallographic method is described for estimating the observed case depth of ferrous powder metallurgy (P/M) parts. This method may be used for all types of hardened cases where there is a discernible difference between the microstructure of the hardened surface and that of the interior of the part.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use
The engineering function of many P/M parts may require an exterior portion of the part to have a hardened layer. Where case hardening produces a distinct transition in the microstructure, metallographic estimation of the observed case depth may be used to check the depth to which the surface has been hardened.
Keywords
case depth; observed case depth; P/M; powder metallurgy; ICS Number Code 77.160 (Powder metallurgy)
To find similar documents by ASTM Volume:
02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)
To find similar documents by classification:
77.160 (Powder metallurgy Including sintered metal materials and hardmetals)
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Document Number
ASTM-B0931-23
Revision Level
2023 EDITION
Status
Current
Modification Type
New
Publication Date
Feb. 13, 2023
Document Type
Test Method
Page Count
3 pages
Committee Number
B09.05