EFFECT OF CARBON, ARSENIC, COPPER AND TIN ON TRANSITION TEMPERATURE OF STEEL

Abstract

This paper gave results of U-notch Charpy tests which were carried out at several temperatures ranging from -80° to 400°C for the purpose of determining the effect of arsenic, copper, tin and molybdenum on the transition temperature of dead soft steel and also determining the effect of carbon and arsenic on the transition temperature of carbon steels. The results obtained were as follows:
1) Carbon raised the fracture transition temperature of steel but in case of U-notch Charpy test it did not raise the ductility transition temperature such as that which was defined by 15 ft-lb energy.
2) Arsenic raised the transition temperature of steel, but arsenic less than 0.1% did not change the transition temperature of steel even when it was contained alone in steel or together with copper and tin.
3) Copper less than 0.35% does not change the transition temperature of dead soft steel when it is contained alone in steel or together with tin and arsenic.