ASTM B312-20
Standard Test Method for Green Strength of Specimens Compacted from Metal Powders

Standard No.

ASTM B312-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM B312-20

Scope

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 Units—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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM B312-20 Referenced Document

• ASTM B215 Standard Practices for Sampling Finished Lots of Metal Powders
• ASTM B243 Standard Terminology of Powder Metallurgy*， 2023-05-01 Update
• ASTM B528 Standard Test Method for Transverse Rupture Strength of Metal Powder Specimens
• ASTM B925 Standard Practices for Production and Preparation of Powder Metallurgy (PM) Test Specimens*， 2022-03-01 Update
• ASTM B962 Standard Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle*， 2023-09-01 Update
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM B312-20 history

• 2020 ASTM B312-20 Standard Test Method for Green Strength of Specimens Compacted from Metal Powders
• 2014 ASTM B312-14 Standard Test Method for Green Strength of Specimens Compacted from Metal Powders
• 2009 ASTM B312-09 Standard Test Method for Green Strength of Specimens Compacted from Metal Powders
• 1996 ASTM B312-96(2002) Standard Test Method for Green Strength for Compacted Metal Powder Specimens
• 1996 ASTM B312-96 Standard Test Method for Green Strength for Compacted Metal Powder Specimens