All the specimens were heat treated in a salt bath furnace. Mechanical properties have been determined
from tensile and charpy impact tests. The tensile specimens were according to DIN50125 and the impact
specimens were according to ASTM E23 as sub size. The test specimens were machined to a size slightly
larger than the desired final dimensions before the heat treatment. After heat treatment, the specimens
were ground to their final dimensions. The tensile properties were determined at room temperature (20oC),
using an Instron machine, with a capacity of 50kN at a constant displacement rate of 6mm/min. The
charpy specimens were tested in a Charpy impact machine at room temperature (20oC). The specimens
were tested with Vickers hardness and by a mass of 30kg.