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ASTM International, 11/01/2012
Publisher: ASTM
File Format: PDF
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Published:01/11/2012
Pages:7
File Size:1 file , 93 KB
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1.1 These test methods use air permeability to determine an envelope-specific surface area and its associated average equivalent spherical diameter (from 0.2 to 75µm) of metal powders and related compounds. The powders may be analyzed in their as-supplied (shipped, received, or processed) condition or after they have been de-agglomerated or milled by a laboratory procedure (lab milled) such as that specified in Practice B859. The values obtained are not intended to be absolute but are generally useful on a relative basis for control purposes.
1.2 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 centimetre (g/cm³) and gram (g) units is the longstanding industry practice; and the units for pressure, cm H2O - also long-standing practice; the values 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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