Sheaf Close
Lodge Farm Industrial Estate
Northampton
NN5 7UL

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Salt Bath Processes

Salt Bath Hardening can offer advantages over alternative hardening and tempering methods. Molten salt is often considered the ‘ideal’ heat treating medium.

When parts are immersed in the molten salt, heat is transferred by direct contact to the surface. Since the parts are immersed in the Salt Bath, air cannot contact the work piece and scaling, oxidation and decarburisation are avoided. Heat transfer into components is very rapid - much faster than with radiation or convection methods.

Additionally, the uniform rate of heat transfer permits components having complex geometries and diverse cross-sections to be heat treated and quenched with minimal distortion. Salt Bath Hardening is ideal for Tool Steels, marquenching can also be used instead of conventional oil quenching.