scope:

This standard describes an analytical method for determination of the acid insolubles content of elemental iron and copper metal powders.

The acid insolubles referred to are compounds that are not completely soluble in ordinary mineral acids. These are generally considered to be silica and silicates, carbides, alumina, clays, other refractory oxides, or difficult-to-dissolve oxides that may be present in the raw material from which the powders are made or were introduced in their manufacturing process. This method excludes insoluble material that is volatile or combustible at the specified ignition temperature.

The values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses were converted in accordance with IEEE/ASTM Standard SI 10. They may be approximate and are only for information.

This standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the potential safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.