Effect of Mo in the Mild Steel Weld Metal for the Low Temperature Britteness

Abstract

In order to investigate the effect of Mo for the low temperature brittleness, the mild steel deposited metals (low hydrogen) containing up to 0.28 % Mo are used. Charpy impact test are carried out in the temperature range of -70°C-100°C.
The transition temperature raises in the range.of 0-0.12% Mo, then lowerizes in the range of 0.12-0.28%o Mo. About thes phenomena and the shape of Energy/Temperature curves some dislocational considerations are persued.