The Iron and steel magazine . for bending tests were \ inch in diameter,by 8 inches in length- About one third of the bar fitted into a Table I Percentages A Nickel Carbon \Manganese Nil o-95 4-25 4-95 7-95 o-75 TO 2 The Iron and Steel Magazine -,!,(;-inch hole drilled in a solid anvil, and the free end was turnedover by blows from a striking hammer. The first four mem-bers of the series all bent parallel, and in doing so developed noapparent flaws. The fifth steel marks a
The Iron and steel magazine . for bending tests were \ inch in diameter,by 8 inches in length- About one third of the bar fitted into a Table I Percentages A Nickel Carbon \Manganese Nil o-95 4-25 4-95 7-95 o-75 TO 2 The Iron and Steel Magazine -,!,(;-inch hole drilled in a solid anvil, and the free end was turnedover by blows from a striking hammer. The first four mem-bers of the series all bent parallel, and in doing so developed noapparent flaws. The fifth steel marks a pronounced change, andbreaks at the comparatively small angle of 30 degrees. Yet thecontent of nickel in E is only .7 per cent greater than in D, asteel which bent parallel without sign of flaw. There is a differ-ence of . 21 per cent in the content of manganese, and a very slightone of .02 per cent in carbon. Such differences, however, canhardly affect the issue, and the change in properties must be Fia. 1.—Bending 5 10 15 Nickel per cent. due to nickel. Further increments of nickel decrease the bend-ing angle until a minimum is reached at a content of percent. Still further increments of nickel mark the gradual returnof ductility, as shown by angles 10, 60 and 180 degrees for steelscontaining respectively , and per cent of last steel, containing nearly 20 per cent nickel, not only bent parallel, but was afterwards closed up, a procedure whichdeveloped no visible flaw. These tests are shown diagrammati-cally by Fig. 1. The average dimensions of the tensile test-pieces emploA^edwere f inch in diameter by 2 inches parallel. Maximum stressincreases fairly gradually up to D, and at the same time ductility Iron Nickel Manganese-Carbon Alloys 103 doc-; not seriously decrease. For some reason no1 yet apparentthe ductility of H is less than thai ol C. The abrtipl chaibetween I) and E noted in the bending is further emphasized inthe tensile t
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Keywords: ., bookcentury1800, bookdecade1890, bookidironsteel, booksubjectiron
