Standard

NS-EN ISO 4491-2:1999

Withdrawn

Note: This standard has a new edition: NS-EN ISO 4491-2:2023

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Abstract

This part of IS0 4491 specifies a method for the determination of the relative loss of mass which a metallic powder undergoes when heated in a stream of pure dry hydrogen under specified conditions. The purpose of this test is to evaluate a chemical powder characteristic which is of importance to the powder metallurgical industry. The test is not intended as a means for the determination of the content of specific elements. (See annex A and IS0 4491-l .) The test method is applicable to unalloyed, partially alloyed and completely alloyed powders of the metals listed in table 1 (see 6.1). It is not applicable to lubricated powders or to mixtures of metal powders. The results can be influenced by the presence of reducible, oxidizable or volatile metals, metalloids or compounds (see annex A). The results obtained on such powders shall be used with caution and their interpretation shall be subject to agreement between supplier and user. This part of IS0 4491 shall be read in conjunction with IS0 4491-I.

Document information

  • Standard from SN
  • Published:
  • Withdrawn:
  • Edition: 1
  • Version: 1
  • Document type: NAT
  • ICS 77.160
  • National Committee CEN/BT

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