. Transactions. i Tj< (N lO CO iM • O CO o ci 1-1 rf O ^ O o o o CO o ro CO 1^ r^ o o o t^ CO 00 CI -*. 126 STATIC AND DYNAMIC TENSION TESTS ON NICKEL STEEL Table 2.—Static Test Drawn at700° C. Drawn at600° C. Drawn at300° 0. Drawn at0°C. Annealed at825° C. Maximum load, lb. per sq. 110,000 152,000 156,500 124,500 110,000 in. Elastic limit, lb. per sq. in. 70,000 120,000 165,500156,500165,500 124,500 65,000 Yield point, lb. per sq. of elasticity 80,00031,000,000 130,00028,200,000 156,500 124,500 165,50028,200,000 26,100,00028,500,000 60,00029,400,000 giving a brittle steel that
. Transactions. i Tj< (N lO CO iM • O CO o ci 1-1 rf O ^ O o o o CO o ro CO 1^ r^ o o o t^ CO 00 CI -*. 126 STATIC AND DYNAMIC TENSION TESTS ON NICKEL STEEL Table 2.—Static Test Drawn at700° C. Drawn at600° C. Drawn at300° 0. Drawn at0°C. Annealed at825° C. Maximum load, lb. per sq. 110,000 152,000 156,500 124,500 110,000 in. Elastic limit, lb. per sq. in. 70,000 120,000 165,500156,500165,500 124,500 65,000 Yield point, lb. per sq. of elasticity 80,00031,000,000 130,00028,200,000 156,500 124,500 165,50028,200,000 26,100,00028,500,000 60,00029,400,000 giving a brittle steel that fails without warning. This may be due tointernal strains that have not been removed, or to the hard marten-sitic structure of the steel. For higher drawing temperatures there isa marked increase in the ductility, as indicated by the curves in and 7, and a greater resistance to shock, as indicated by the curvein Fig. 5. Conclusions 1. The curve in Fig. 5 indicates that for hard steels the total workof rupture is very low under either a slowly or a rapidly applied load. 2. The curve in F
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
