MIL-DTL-8971F
4.6.2.5 Impurities. Elemental impurity levels in disk and rod electrodes (see 3.8) shall be
determined by a methodology selected by the manufacturer. For each qualification lot, the
manufacturer shall provide a written certification, in accordance to the instructions in 4.9, that
the end products being qualified conform to the impurity requirements of this specification. For
each production lot requiring conformance testing, the contractor shall provide a written
certification, in accordance to the instructions in 4.9, that the end products being proposed for
government acceptance conform to the impurity requirements of this specification. These
certifications shall be signed by a responsible official of the manufacturer's/contractor's
organization. In their certification documents, manufacturers and contractors shall identify the
actual impurity level of each element that was determined to exist in the samples and shall
provide a copy of their procedure or methodology used to determine the elemental impurity
levels. Contractors shall also make their certification documents available to government in-
plant inspectors for their review.
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