A professional who controls furnace to harden surface of steel objects, using any of following methods. Respnsibilities include:

• (1) Places objects in wire basket and immerses them in heated chemical bath, such as sodium cyanide.
• (2) Packs objects in metal boxes filled with carbonaceous material, such as coke, coal, bone charcoal, or barium carbonate, and charges boxes into furnace.
• (3) Charges objects into furnace and opens valves to circulate carbon-rich gas, such as methane, around objects during heating process.
• Removes objects from bath or furnace and quenches objects in oil, water, or brine, or allows objects to cool to predetermined temperature before quenching, depending on metal properties specified.
• May be designated according to article case-hardened as Die Case Hardener (heat treating); or by process used as Cyanide Furnace Operator (heat treating).