* The [[quality]] of the charcoal affects the success chance as well as the likelihood the lump will be high quality. It would be wise to not risk wasting high quality iron on poor charcoal unless you have a lot of it.
* The quality of the iron lump caps the quality of the steel lump.
*A failed attempt uses up consumes the charcoal and transforms 0.4kg of iron, and results in into a 0.4kg iron scrapnew lump with 10% of the original QL.
* Only the charcoal needs to be glowing hot.