[header] How to make a metal forge [title] Determine the working range of the metal you are going to forge or weld. [step] Iron is forged in the range 1200 f to 2550 f (650 c-1400 c), brass or bronze at somewhat cooler temperatures. [title] Choose a fuel for your forge. 
[step] Natural gas, propane, or liquefied propane gas are readily available in most locations, but for an authentic, old fashioned forge, coal/coke or charcoal fires would be the first choice. [title] Design the hearth and fire pit to a size suitable for the project you are going to use it for.