This tag should be used for questions about working specific metals in fictional worlds, e.g., questions about the processes and tools needed if the availability of certain metals was different from than on our Earth or metalworking in unusual conditions or environments.
This tag should be used for questions about working with different metals in your fictional world, such as questions about which processes and tools would be different if certain metals were much rarer than on our Earth or working with metal in unusual conditions.
Such questions should detail what differences exist between the real world setup and the fictional setup and which problems you encountered while working on your world, possibly with information about why you couldn't solve the problem so far.
Questions with this tag may also deal with the problem of using certain procedures or creating certain tools in a different time-period then they were used in the real world. In such cases you might be interested in the tag alternate-history or other time-depicting tags, such as medieval-europe.