METALKAT S.A. began its activities in 1982 undertaking projects, mainly, in steel and aluminium industries.The company has collaborated with:
- ELVAL S.A.
- HALCOR S.A.
- SOLINOURGIA KORINTHOU S.A.
- ETEM S.A.
- HELLENIC CABLES S.A.
- FITCO S.A.
- EVIEP S.A.
- ΤΕΚΑ SYSTEMS S.A.
- HALIVOURGIA SOVEL S.A.
- MAILIS S.A.
- K. MPALAFAS S.A.

Big customers of company in the sector of mechanical constructions, steel buildings, combined structures and Crane Bridges, are:
-HALIVOURGIKI S.A.
-ALUMINCO S.A.
-ABB S.A.