Boronizing steel is a thermo-chemical process to harden the surface of different work pieces. The result is a higher resistance to acids and temperature, reduced tendency to cold weld and a micro-hardness of 1900 HV.Steel components often require special treatments to function at the highest level and fulfil all the customer’s needs. This includes for example surface hardening processes such as induction hardening, carburizing, nitriding and of course boronizing steel. Especially the latter process helped steel becoming one of the most used construction and manufacturing materials all over the world. Properties provided by boronizing steelThe processed material benefits in several ways from the surface hardening process. During the process of boronizing steel, boron atoms are diffused into the metal work piece to form FeB and FeB2. These are complex borides with a thickness of up to 200 µm and no mechanical interface towards the base material. As a result, the work piece is provided with several desirable properties.Amongst many other properties, the micro-hardness up to 1900 HV, the resistances to high temperatures and acids as well as the reduced tendency to cold weld have definitely to be mentioned. Boronizing steel furthermore results in a reduced coefficient of friction of 0.4 and higher wear resistance. Consequences of boronizing steel components are therefore lower operating and maintenance costs. Common materials for boronizing steelBoronizing steel is not the only possibility to harden the surface of a ferrous or non-ferrous work piece. The process of boronizing is applicable to a huge variety of ferrous metals, such as tool steels, carbon steels, low alloy steels and several stainless steels. Notwithstanding this, also non-ferrous metals and alloys are suitable for this kind of treatment, for example Niobium and Titanium as well as alloys based on these metals. Boronizing steel is not possible when leaded, resulfurized and nitrided steels come to use.Typical applications for boronizing steel include plungers, nozzles, gears, metal seals, valve and turbine components, dies and many more. Inter alia, the Automotive Industry, Oil & Gas Industry, Textile Industry and manufacturers of agricultural components rely on boronizing steel to create a hard surface and a superior wear resistance.