History of Steelmaking in Miskolc

The site of the Diósgyőr Steelworks has a history of more than two and a half centuries of industrial activity. The origins of iron production in Diósgyőr date back to the 1770s, when the first ironworking manufactories were established in the region during the reign of Maria Theresa. Founded in 1770, the Diósgyőr-Hámor Ironworks was relocated to the present-day Diósgyőr site in 1868 by government decision. One of the plant’s main tasks was to serve Hungary’s rapidly developing railway network, initially producing rails and railway components.

The development of the Diósgyőr iron and steel industry was accompanied by continuous technological innovation. From the late 1870s, the plant gradually switched to more advanced open-hearth steel production. The introduction of Siemens–Martin furnaces and Bessemer converters significantly increased both production capacity and quality. With the establishment of steel and iron foundries, forging workshops and various rolling mills, the range of products expanded considerably. The Diósgyőr plant gradually became one of Hungary’s most important centres of iron and steel production.

The importance of the plant extended well beyond railway products. By the turn of the century, it employed nearly 10,000 people, and Diósgyőr specialists contributed to major industrial projects, including the production of structural components for the Elisabeth Bridge in Budapest. The developing industrial complex also played an important role in the defence industry: initially, it produced specialised plates for ammunition, followed by gun barrels and later complete artillery pieces. During the First World War, the Újgyár (New Plant) was established alongside the Ógyár (Old Plant) to support these activities, later developing into a major machine manufacturing facility.

Following the destruction caused by the Second World War, another period of large-scale development began. New blast furnaces, electric furnaces and rolling mills were built, and the Diósgyőr steel industry increasingly specialised in the production of high-quality and special steels. At this time, the plant operated as a highly complex, almost fully integrated industrial system: numerous stages of production took place on the same site, from iron ore processing and pig iron production through steelmaking, casting, forging and rolling to the manufacture of finished products.

The Diósgyőr plant was not only an economic and industrial centre, but also a defining part of the life of the city. At its peak in 1964, it employed nearly 20,000 people, while around 12,000 employees were still working at the plant in 1989. The company also supported the lives of its employees and their families by maintaining a wide range of social, healthcare, cultural and sports facilities. The residential areas and institutional network that developed around the plant shaped the development of Diósgyőr and Miskolc for decades.

Following the political and economic transition, the former large-scale industrial structure gradually began to break apart. In 1989, the Lenin Metallurgical Works was renamed DIMAG Rt., and after 1991 the process of dividing the integrated production system into separate units and establishing independent plant operations began. Several attempts at privatisation and restructuring followed in subsequent years, but these were unable to secure the long-term survival of the steel industry. The operations of DIMAG Rt., followed by DAM Rt., DAM Steel Kft. and finally DAM 2004 Kft., were each followed by liquidation proceedings.

In 2009, production ceased permanently, bringing to an end one of the most important chapters in the more than two-century history of large-scale steelmaking in Diósgyőr. Some of the former factory buildings and halls have survived, while others were demolished or transferred to new owners. In the years that followed, the ownership and use structure of the vast industrial site became increasingly complex.

The legacy of the Diósgyőr Steelworks, however, remains present today. Businesses continue to operate on the historic industrial site, some of which carry on aspects of the traditions of Diósgyőr’s steelmaking industry through metal processing, forging, machinery and metal structure manufacturing, machining and other industrial activities.

The history of the Diósgyőr Steelworks is therefore more than the history of a single factory. Its more than 250 years of industrial heritage is closely intertwined with the economic, social and urban development of Miskolc. Today, the area stands at the beginning of a new chapter, with the aim of building on and preserving the values of its industrial past and, in the future, once again becoming one of Miskolc’s significant economic and community areas.