A professional who tends battery of molten carbonizing salt bath or ammonia-methane furnaces that case harden steel objects, such as buckles, screws, wrenches, and bicycle crank cups. Respnsibilities include:

• Loads objects by hand into wire basket attached to steel-rod handle.
• Immerses basket into chemical bath inside furnace pot or into ammonia-methane furnace.
• Scoops salt into furnace pots to maintain bath level or opens valves to inject gases into furnace, and sets timer.
• Removes basket from furnace at end of heating cycle and dumps objects into mesh container submerged in tank of quenching oil.
• May lift container from quenching tank and dip container in rinse water.
• Dumps objects into box or tray.
• May signal forklift operator to deposit or extract containers of objects into and from furnaces and quenching and rinse tanks.