. Transactions. , 650° C. IN THIS CASE. PLOTTEDFROM THE DATA USED FOR FiG. 1. The BrineU method is a very accurate way of determining the hardnessof sheet brass. The hardness of rolled metal is relatively proportionateto the percentage reduction by rolling.^ The hardness of annealedmetal is relatively proportionate to the temperature of annealing^(for any fixed period of time). The Brinell hardness of annealed metalis proportionate to the annealing temperature, but this proportion varieson account of two factors; namely, the amount of the last rolling themetal received, and the grain size that
. Transactions. , 650° C. IN THIS CASE. PLOTTEDFROM THE DATA USED FOR FiG. 1. The BrineU method is a very accurate way of determining the hardnessof sheet brass. The hardness of rolled metal is relatively proportionateto the percentage reduction by rolling.^ The hardness of annealedmetal is relatively proportionate to the temperature of annealing^(for any fixed period of time). The Brinell hardness of annealed metalis proportionate to the annealing temperature, but this proportion varieson account of two factors; namely, the amount of the last rolling themetal received, and the grain size that existed at the time of that 1 and 4 to 13 illustrate these points in the case of the () gage cartridge brass and show: that in annealing hard- * C. H. Davis: Testing of Sheet Brass. Proceedings, American Society for TestingMaterials (1917) 17, Pt. 2, 166. » C. H. Davis: Op cit., Fig. 8 and Fig. 3. W. H. BASSETT AND C. H. DAVIS 435 PER CENT. REDUCTION PER CENT. REDUCTION. Bhin. 100 ° C. AXXEAL Bhix. lOG Fig. 4.—Etched with ammonia and hydrogen peroxide. X 75. 436 A OF GRAIN-SIZE MEASUREMENTS PER CEXT. REDUCTION 4 PER CEXT REDUCTION
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
