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a Hydrostatic tests of 27 shrapnel cases
6 Hydrostatic tensile hardness and Charpy impact tests of
c Tensile and hydrostatic tests of 4 7inch shrapnel cases 43
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5.39 square inches air cooled annealed Appearance of fracture Applied loads band groove BAR STOCK blowholes cementite Charpy impact test Chemical analysis compression converter metal cracks cropping point curves deoxidizer Depth inside Diameter of piston edge of band elastic limit Elongation end of splice entered testing cylinder etched with iodine eutectoid Extensometers ferrite forged Fracture started furnace gauged length grain gram granular heat treatment Heated to 825 inches from end inches length ingots Inside diameter interior pressure ladle length of reduced Longitudinal rupture manganese martensite material Micrograph oil quenched overstrain pearlite Period of rest pieces pounds per square pounds pounds reduced thickness relative density rotations the bar sample Savage Arms section at cropping Sectional area Set inch shows silky slag sorbite square per square strand streaks visible structure Table temperature Tensile strength test specimens thickness of walls Ultimate strength walls exposed Watertown Arsenal yield point