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Slow travel speeds should be used to reduce the risk of weld metal solidification cracking. In addition, low arc energies must be used to reduce the risk of liquation cracking in the HAZ.

To improve the machineability of steels, elements are added that promote chip formation, rather than the formation of long lengths of swarf. Those elements comprise sulphur (S), lead (Pb) and selenium (Se).

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When welding is part of a fabrication procedure, the use of free-machining steels should be eliminated at the material selection stage.

If a free-machining steel has to be welded, then it is essential that low-hydrogen electrodes and low welding currents are used to limit dilution and reduce the risk of porosity and cracking.