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gas nitriding

Aalberts surface technologies > processes > gas nitriding
what is gas nitriding?
the process
fields of application
groundbreaking industries
locations & contact

what is gas nitriding?

Gas nitriding is a low temperature furnace treatment with an atmosphere of Ammonia. The nitriding process is an established and successful means of generating a hard case on a component. The aim of the process is to create a certain level of protection against corrosion and to protect the material from wear. In addition, the strength of the material can be improved in this way.

the process

Nitriding is another form of surface hardening of steels. It is a thermochemical process in a nitrogen-releasing environment. In this atmosphere the material is heated to a temperature between 475 and 550°C. The material is then held at this temperature for a certain time. This time can vary from a few minutes up to 120 hours. Eventually, the material is cooled down.

The desired hardness is created by the transfer of nitrides into the metal mesh. Different degrees of hardness can be achieved depending on the element used.

The characteristics of the process are:

  • Low temperature between 475°C to 550°
  • Flexibly applied – process duration modified according to the specification of the required final component properties.
  • Environmentally friendly compared to serious alternatives (e.g. chrome plating).
  • Clean for the component –g. leaving no heavy surface contaminant or residue.

fields of application

The process is usually performed on fully finished components which, in many instances, require no additional operations prior to assembly.

Usually nitriding is only used on alloy steel. These have a carbon content of 0.3 to 0.4%. It is possible to nitride other materials such as stainless steel, titanium and nickel alloys, however the preferred nitriding route for those materials is Plasma Nitriding. 

The resulting layer is relatively thin, so that changes in shape cannot be changed afterwards by grinding. However, the changes in shape during nitriding are comparatively very small. Stress relieving should be carried out beforehand. In this way it can be achieved that the material is free from stresses, which in turn reduces the risk of shape changes.

This process is most useful for components such as Crankshafts, Gears and a multitude of other parts in tough environments (especially oil & gas, energy, aerospace, etc).

groundbreaking industries we serve

Tool Manufacturing
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process locations

Any questions? Contact us directly or select a process location near you.

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Letchworth

United Kingdom
51.9887569-0.2038797 info.letchworth@aalberts-st.com +44 1462 472100 show location
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Pinto

Spain
40.2523494-3.7105911 info.madrid@aalberts-st.com +34 916 923 330 show location
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United Kingdom
52.7205556-2.4701772 info.telford@aalberts-st.com +44 1952 677372 show location
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the Netherlands
51.44642316.1786697 info.venlo@aalberts-st.com +31 77 308 1333 show location
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Germany
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Remscheid

Germany
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Thyez

France
46.07632076.5266973 info.thyez@aalberts-st.com +33 450 3463 98 show location
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Gaildorf

Germany
49.01621959.7588191 info.gaildorf@aalberts-st.com +49 7971 96980 show location
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Kehl

Germany
48.500157.82006 info.kehl@aalberts-st.com +49 7854 96470 show location
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Germany
48.229769.83458 info.laupheim@aalberts-st.com +49 7392 70960 show location
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France
47.41544421.0245775 info.amboise@aalberts-st.com +33 247 2374 74 show location
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Sweden
57.265275813.615284 info.nordic@aalberts-st.com +46 371 58 71 70 show location
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Dunningen

Germany
48.2249668.5003521 info.dunningen@aalberts-st.com +49 7403 92907-0 show location
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the Netherlands
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