Vyuma vinavyotumiwa kutengenezea zana mbalimbali za kukata, deformation baridi na moto hufa, zana za kupimia na zana nyingine kwa pamoja hujulikana kama vyuma vya zana.
Nyenzo:6Cr4W3MoVNb,6W6Mo5Cr4V,7Cr7Mo3V2Si,Cr4W2MoV,Cr5Mo1V,Cr6WV,Cr12,Cr12MoV,Cr12W,Cr12Mo1V1.
Kipenyo: 12-650 mm.
Uso: Uchoraji Safi/Nyeusi Mkorofi/Milled/Kusaga n.k.
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