Over the years HEC absorbed and assimilated technology from various internationally renowned organizations.
| M/s HITACHI ( Japan ) | Forged RollTechnology |
| M/s RANSOM & RAPIER (UK) | Walking DRAGLINE for open cast mines |
| M/s BUCYRUS-ERIE (USA) | 10 Cu.M. Excavators for open cast mines |
| M/s O&K ORENSTRIN & KOPPELAG (Germany) | Hydraulic Excavators for coal mines |
| M/s GHH STERKRADE (Germany) | Mine Winders & Vertical Transportation System |
| M/s DEMAG LAUCHHAMMER (Germany) | Stackers, Reclaimers etc. |
| M/s SMS SCHLOEMANN SIEMAG (Germany) | Continuous Casting Plants |
| M/s Schelke Eisenhutte Maschinefabrick GMBH, Germany | New generation Coke Oven Machines |
| M/s Benxi Iron & Steel Group Crane Works Ltd., (China) | Torpedo Ladle Cars |
| M/s WOODAL DUCKHAM (UK) | Low Temperature Carbonisation & Gas Cleaning |
| M/s SKODA, CKD BLANSKO, TOS of CSSR | General purpose m/c tools like Radial Drills, Planing, Lathes, Horzontal & Vertical Boring machines |
| M/s HERKULES (Germany) | Roll Grinding machines |
| M/s HEGENSCHEIDT (Germany) | Special purpose Railway m/c tools, meant for wheel & axle journal turning of all types of railway wheel sets |
| M/s BOEHRINGER (Germany) | Plano Milling machines |
| M/s O-M (Japan) | Vertical Borers |
| M/s CREUSOT LOIRE (France) | Diesel Locomotive Crank Shafts thro' the continuous-grain-flow process known as R-R Process |
| M/s NATIONAL FORGE COMPANY (USA) | Diesel Locomotive Crank Shaft for Nitriding & finish machining |