A professional who assists first helper to melt and cast iron and steel in open-hearth furnaces. Respnsibilities include:

• Cleans furnace tapholes, using scraper and oxygen lance.
• Closes furnace tapholes with pipe, chrome ore, dolomite, or magnesite to prevent loss of molten metal, and relines steel runners.
• Weighs additives, such as fluorspar, lime, and manganese, and trucks them to furnace areas.
• Shovels refractory materials into furnace.
• Assists crew in slagging or flushing furnace.
• Starts furnace by igniting gas, using torch.
• Performs other duties as described under helper master title.