As of 1863, a rocking Bessemer converter, which made the steel production more efficient, was used in Turrach. In 1865, three converters with a capacity of 35 to 40 quintals and two blast furnaces were available. At that time, the iron smelting facility was Styria's largest and was considered to be one of the most modern in Europe. In spite of the technical innovations, there was soon an economic decline. As of the 1870s, the sales worsened; the production of raw iron decreased from 3,800 to 1,500 t between 1869 and 1885. Besides increasing coal prices, Turrach's disadvantageous location off the major transport routes caused high transportation costs, which were responsible for the decreasing competitiveness of the iron companies. In 1899, the iron smelting facility was leased out, which brought no improvement, so the furnace in Turrach was finally shut down in the spring of 1909.