Mohala oa koporo o na le motlakase o motle oa motlakase le oa mocheso, ho hanyetsa kutu le thepa ea machining, e ka chesetsoa le ho chesoa.E na le litšila tse fokotsehileng tsa motlakase le mocheso o fokolang, ho latela oksijene ho na le phello e fokolang ho conductivity ea motlakase le ea mocheso le thepa ea ho sebetsa, empa ho bonolo ho baka "lefu la hydrogen", ha ea lokela ho ba mocheso o phahameng (joaloka> 370 ℃) ho fokotsa ts'ebetso ea sepakapaka ( annealing, welding, joalo-joalo) le tshebediso.