Antimony segregation tendency

Physico-chemical mechanism of action

Antimony is a metallurgical trace element that aggregates at the grain boundaries in the molten phase. This causes an uneven distribution of the element and leads to a deterioration of notch impact work at low temperatures.

Metallurgical relevance & risks when welding

The tendency of antimony to segregate can lead to porosity in the weld, especially if the molten phase lasts a long time. This porosity can lead to destruction and reduction of the mechanical properties of the weld.

Workshop practice & instructions

To minimize the segregation tendency of antimony, the melt time should be kept as short as possible. Rapid cooling and an optimal melt temperature can help reduce porosity.