industrial furnace in workshop of a forging plant for hardening steel at high temperature. blacksmith and metallurgical industry,

annealing background billet blacksmith blacksmithing blast burning cast factory fire flame forge forged forging forgings foundry furnace hardening heat hot industry ingot iron machinery manufacture melt metal metallurgical metallurgy metalworking molten plant press process processing rolled smelting smithy stainless stamping steel steelworks tempering treatment work workshop