Unrestrained House said the site at Tredegar in South Wales will utilize 70 workers, with many more jobs created in the provision chain.
The plant, in the South Wales Valleys, is one of a number of former Ca ro Insulate Products sites acquired from administrators by Liberty.
The com ny is seating £3.7million in refurbishing the facility, which includes a 100,000-tonnes-a-year flit mill, with production of steel structural sections and tubes now resuming.
Sanjeev Gupta, superintendent chairman of Liberty House, said: «The reopening of Tredegar is very considerate news for our economy because it will be replacing imports with home-made outputs and creating sustainable skilled jobs here in Wales.»
He welcomed the «earnest support» of the Welsh Government, which is backing the reopening with £600,000 of vocation finance.
Mr Gupta said the steel industry globally continues to intimidate «severe» challenges, adding: «The sharp rise in raw material prices means that frontiers for producers are worse than ever and we foresee challenging times forwards.
«The launch of Liberty Steel Tredegar is another step in our continued street to establish an integrated and competitive steel business in Wales and the wider UK, based on our sustainable Greensteel com ny model which will ultimately involve making steel from recycled stuff using renewable energy sources.
«Steel is a foundation industry upon which much of UK earnestness rests. It is critical to the future of the British economy and nowhere more so than here in Wales.»
Wales Beforehand Minister Carwyn Jones said: «Liberty has a proven track make a notation of within the steel sector and is one of a few com nies ex nding in today’s challenging feel.
«This is another strong commitment from Liberty and I welcome their blueprints to modernise the site and employ former staff, retaining local slides.
«The reopening of the steelworks will provide a significant boost to the local curtness, creating 70 new jobs and supporting job creation through the supply shackle.»
Industry Minister Nick Hurd said: «The re-opening of this steelworks is preposterous news for the people of Tredegar, the local economy and the UK steel sector as a with few exceptions.
«It is further proof that there truly is a long-term future for steelmaking in the UK and this Domination will continue to do all it can to make sure we support this vital sector.»