Franz Großschädl produces steel blocks in an adapted 6-tonne electric arc furnace, which are rolled into reinforcing steel in the Annahütte in Hammerau (Bavaria) and wound into ribbed gate steel in Graz.

First attempts to build a continuous casting plant in which the molten steel is cast into billets.

With the construction of a steel and rolling mill at the current Marienhütte site, Franz Großschädl is able to carry out the entire production process (melting, casting, rolling, twisting) at the site itself.

The production company "Stahl- und Walzwerk Marienhütte" is spun off from the trading company "Franz Großschädl Eisen-, Stahl- und Metallgroßhandel".

The commissioning of the first dedusting plant puts an end to the protests by local residents that have been ongoing since 1974.

More than 100,000 tons of steel are melted at the Marienhütte for the first time.

Termination of torsion and switch to the Tempcore quenching and tempering process. Commissioning of a ladle furnace for secondary metallurgical work.

Marienhütte, which had fallen into difficulties, was acquired by AVI (Alpenländische Veredelungs-Industrie Gesellschaft m.b.H.) and EVG (Entwicklungs- und Verwertungsgesellschaft m.b.H.) and technologically focused entirely on the production of reinforcing steel.

In a cooperation agreement between AVI, Marienhütte and Voest-Alpine ("Styrian steel solution"), it is agreed that the necessary capacity expansions in Styria will be carried out by Marienhütte and shared between the three contractual partners.

In order to realize the "Styrian steel solution", the Marienhütte plant area has to be doubled and the entire plant completely renovated. As part of these activities, the Südbahnstrasse will be relocated to the west, a new scrap hall will be built and the steel and rolling mill, including the dedusting plant, will be completely renewed. A total of around 20 million euros will be invested in environmental protection measures.

With the simultaneous conversion of the slag industry, the marketing of the artificial stone "Hüttenschotter" for road and engineering construction is also made possible.

In cooperation with Grazer Stadtwerke, the first industrial residual heat from the pusher-type furnace chimney is fed into the district heating network of the city of Graz. Since then, numerous further expansion steps have been taken to increase the yield from 5.5 GWh (1993) to 100 GWh.

Marienhütte produces over 200,000 tons of steel for the first time.

Marienhütte is participating in the Ökoprofit program of the Environmental Agency of the City of Graz for the first time and has done so regularly ever since.

Marienhütte produces over 300,000 tons of steel for the first time.

By placing the billets in the natural gas-fired pusher furnace immediately after casting at approx. 900°C, it is possible to reduce the natural gas consumption of this unit by half. This resulted in an annual saving of over 6,000 tons of CO2.

With the acquisition of the last concrete steel activities of Voest-Alpine, which also took place in 2002, the entire concrete steel segment in Austria can be concentrated in the hands of AVI/Marienhütte.

By integrating the cooling circuit of the melting furnace into the heat extraction system, the annual yield is doubled to 40,000 MWh.

Essential parts of the rolling mill (pusher furnace and roughing mill) are being renovated in preparation for the start of production of spooled reinforcing steel. In a further step, the rolling mill hall in the south is extended by 120 meters to create space for the spooling plant to be installed there. This plant will go into production in 2008.

In 2007, the Office of the Styrian Provincial Government granted approval to the artificial stone Hüttenschotter as a construction product within the meaning of the Construction Products Directive.

Marienhütte receives the "klima-aktiv" award from Environment Minister Berlakovich for the development of an "online laser exhaust gas analysis".

By constructing a heat storage facility that can buffer heat peaks, the annual extraction volume can be increased again by 50% to 60 GWh. With the construction of the energy center and the so-called "Power Tower" just two years later, Marienhütte is in a position to supply the new district of Graz-Reininghaus, which is currently under construction, with 100% local heating.

Marienhütte produces over 400,000 tons of steel for the first time and is one of the first steelworks in Europe to receive the SustSteel certificate for sustainable reinforcing steel production.

2013 also sees the exit from the mesh business, which is transferred to a joint venture with the Pittini Group. In the same year, Marienhütte acquires a strategic stake in Stahl-Form Baustahlbearbeitungs GmbH, which is increased to 100% just one year later.

In order to be able to supply the minimum ring weights required by the market, Marienhütte is developing a rewinding system together with EVG in which up to 5 tons of rings can be produced.

After years of legal disputes, the Styrian Provincial Administrative Court confirms that the Marienhütte gravel is a by-product; a finding that is also confirmed by the Administrative Court of last instance shortly afterwards.

In the same year, a state-of-the-art new dedusting plant is built at a cost of € 8 million as a preliminary investment for the Graz-Reininghaus district that is being built. This plant makes it possible to fall below the applicable emission limits by a factor of ten.

In a new declaratory procedure concerning metallurgical gravel, the Provincial Administrative Court and the Administrative Court of Justice once again establish - this time with an explicit binding effect for the future - that the environmental impact of the artificial rock metallurgical gravel is no greater than that of natural gravel. This brings to a final conclusion a campaign of defamation against this by-product that has been going on for years.

An Environmental Product Declaration drawn up in accordance with ISO14025/EN15804 confirms that reinforcing steel from Marienhütte has a uniquely low CO2 footprint. Taking into account the CO2 emissions saved through heat extraction, it may even be the lowest in the world.