- Sidmar Gent Belgien, Belgium
- Usinor Sollac Belgium, France
- Lorfonte Belgium, France
- Z&J Zimmermann und Jansen Technologies GmbH, Germany
- Siemens VAI Metals Technologies GmbH & Co., Austria
- DB Thermal, South Africa
- Saldana Steel, South Africa
- Jindal Steel, India
- Lurgi AG, Germany
- Lurgi AG, Austria
- Bell Maschinenfabrik, Switzerland
- Britisch Steel, Great Britain
- Hyundai Heavy Industries,Korea
- Rashtriya Ispat Nigam, India
- Vallourec und Mannesmann Tubes, Brazil
- DME, Brazil
- GEA AG, Germany
- Companhia Siderurgica, Brazil
- SSAB Oxelösund AB, Sverige