Steelmaking has been an integral part of Cardiff’s industrial heritage for well over a century. With its strategic location and skilled workforce, the city became a cornerstone of the UK’s steel industry. Our story began as Alloyed Steel Wire, a key player in Cardiff’s manufacturing landscape, and evolved significantly in 2003 when the business was acquired by CELSA Group, one of Europe’s largest steel producers.

Under CELSA’s ownership, the company expanded and modernised, commissioning a state-of-the-art Electric Arc Furnace (EAF) melt shop in 2006 and becoming the UK’s largest producer of reinforcing steel. For over two decades, it supplied essential materials to critical infrastructure and construction projects across the UK and Ireland.

In 2025, the business entered a new era when it was acquired by Sev.en GI, a Czech investment group focused on building sustainable, future-ready enterprises. Rebranded as 7 Steel UK, the company now represents the next generation of British steelmaking — combining deep-rooted local expertise with forward-looking innovation and investment.