Factorial Analysis of Welding Current Influence on Heat Affected Zone Hardness of Cast Iron, Aluminium, and Mild Steel Weldments Cooled in Palm Oil

Table 4

Variations of model predicted HAZ hardness with deviations and correction factors.

Material	MoD	Dv (%)	Cf (%)
Aluminium	406.98	−0.0049	+0.0049
Cast iron	870.03	+0.0034	−0.0034
Mild steel	503.03	+0.0060	−0.0060