ISO 13947:2007

Metallic powders — Test method for the determination of non-metallic inclusions in metal powders using a powder-forged specimen

Publication date:   Feb 6, 2007

95.99 Withdrawal of Standard   Nov 25, 2011

General information

95.99 Withdrawal of Standard   Nov 25, 2011

ISO

ISO/TC 119/SC 2 Sampling and testing methods for powders (including powders for hardmetals)

International Standard

77.160   Powder metallurgy

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Scope

ISO 13947:2007 specifies a metallographic method for determining the non-metallic inclusion level in metal powders using a powder-forged specimen. The test method covers repress powder-forged test specimens in which there has been minimal lateral flow (< 1 %). The core region of the powder-forged test specimen contains no porosity detectable at 100X magnification.
This test method can also be used to determine the non-metallic inclusion content of powder-forged steel parts. However, in parts where there has been a significant amount of material flow, the near-neighbour separation distance needs to be changed, or the inclusion sizes agreed between the parties need to be adjusted.
This test method is not suitable for determining the non-metallic inclusion level of parts that have been forged such that the core region contains porosity. At the magnification used for this test method, residual porosity is hard to distinguish from inclusions. Too much residual porosity makes a meaningful assessment of the inclusion population impossible.

Life cycle

NOW

WITHDRAWN
ISO 13947:2007
95.99 Withdrawal of Standard
Nov 25, 2011

REVISED BY

PUBLISHED
ISO 13947:2011