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Full Description

1.1 This standard covers a test method that may be used to measure the transverse rupture strength of a compacted but unsintered (green) test specimen produced from lubricated or unlubricated metal powders or powder mixtures.

1.2 Green strength is measured by a quantitative laboratory procedure in which the fracture strength is calculated from the force required to break an unsintered test specimen supported as a simple beam while subjected to a uniformly increasing three-point transverse load under controlled conditions.

1.3 This test method is a companion standard to Test Method B528 that covers the measurement of the transverse rupture strength of sintered PM test specimens.

1.4 With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimeter (g/cm³) and gram (g) units is the longstanding industry practice, the values in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5 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.

 

Document History

  1. ASTM B312-14

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    Standard Test Method for Green Strength of Specimens Compacted from Metal Powders

    • Most Recent
  2. ASTM B312-09


    Standard Test Method for Green Strength of Specimens Compacted from Metal Powders

    • Historical Version
  3. ASTM B312-96(2002)


    Standard Test Method for Green Strength for Compacted Metal Powder Specimens

    • Historical Version
  4. ASTM B312-96


    Standard Test Method for Green Strength for Compacted Metal Powder Specimens

    • Historical Version