ASTM E194-10 Method for Acid-Insoluble Content of Copper and Iron Powders

ASTM E194-10 Method for Acid-Insoluble Content of Copper and Iron Powders

The purpose of this test method is to determine the amount of gangue, refractory, inert, etc., materials that may adversely affect compacting tools and sintered properties of components formed from copper and iron powders.

    Scope:

    ASTM E194-10 test method covers the determination of the mineral-acid-insoluble matter content of copper and iron powders in amounts under 1.0 %.

    Test Procedure:

    The sample is dissolved in the appropriate acid: nitric acid (HNO3) for copper, hydrochloric acid (HCl) for iron. The insoluble matter is filtered out and ignited in a furnace at 980 °C for 1 h.

    Test Specimen:

    5g of Copper and Iron powder.

    Data:

    Where:

    Calculate the percentage of insoluble matter as follows:

    A = insoluble matter,

    B = sample used, g.

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