Example

The power source in a particular welding setup generates $3500$ W that can be transferred to the work surface with a heat transfer factor $=0\mathrm{.}7.$ The metal to be welded is low carbon steel, whose melting temperature, from Table $25\mathrm{.}2,$ is $1760$ K $.$ The melting factor in the operation is $0\mathrm{.}5.$ A continuous fillet weld is to be made with a cross$-$sectional area $=20m{m}^2.$ Determine the travel speed at which the welding operation can be accomplished.

$R_{HW}=U_m{A}_{w}v,U_m=K{T}_m^2$