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Standard Test Method for Metallographically Estimating the Observed Case Depth of Ferrous Powder Metallurgy (PM) Parts
STANDARD published on 1.9.2014
Designation standards: ASTM B931-14
Note: WITHDRAWN
Publication date standards: 1.9.2014
SKU: NS-8843
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
case depth, observed case depth, PM, powder metallurgy, ICS Number Code 77.160 (Powder metallurgy)
Significance and Use | ||||||
5.1 The engineering function of many PM 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. |
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1. Scope | ||||||
1.1 A metallographic method is described for estimating the observed case depth of ferrous powder metallurgy (PM) 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 With the exception of the values for grit size for which the U.S. standard designation is the industry standard, the values stated in SI units are to be regarded as standard. 1.3 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. |
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2. Referenced Documents | ||||||
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Historical
1.11.2009
Historical
1.5.2011
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1.9.2014
Historical
1.9.2014
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1.4.2009
Historical
1.4.2013
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