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Conversion. Copper and brass processing. This sample of brass strip is being tested on a Rockwell Hardness Testing Machine.…
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Conversion. Copper and brass processing. This sample of brass strip is being tested on a Rockwell Hardness Testing Machine. This test is based upon the depth a steel ball penetrates the metal. A minor load is applied first to hold the ball in position, and then a major load is applied. The dial on the machine measures the depth of the penetration. This test is made to check the physical properties of the metal. Chase Copper and Brass Company, Euclid, Ohio. Sourced from the Library of Congress.

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Conversion. Copper and brass processing. This sample of brass strip is being tested on a Rockwell Hardness Testing Machine. This test is based upon the depth a steel ball penetrates the metal. A minor load is applied first to hold the ball in position, and then a major load is applied. The dial on the machine measures the depth of the penetration. This test is made to check the physical properties of the metal. Chase Copper and Brass Company, Euclid, Ohio. Sourced from the Library of Congress.

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