Suitable materials


A surface hardening process for steel and cast iron, carried out in a gas oven, makes the surface resistant to wear and corrosion.

See also the brochures and certificates

The Nitrotec® process can be applied to many materials, but not all steel grades are suitable.

suitable materials are:

sheet material

Non-alloy carbon steel up to 0.4 % C e.g. DO1….DC04 (1.0330…… 1.0338)
Micro-alloyed steel or HSLA steel with the addition of Niobium (Nb)
All steels are preferably aluminised.
Spring steel 0.5 – 0.8 % C e.g. CK75 (1.1248)

bar material
Refining steels with maximum 0.4% C. All materials in condition Q+T, whereby the temper temperature is > 610 °C. Most common are for example, 42CrMo4 (1.7225) and 42CrNiMo6 (1.6565). Insertion steels such as 15Cr3 (1.7015) and 16MnCr5 (1.7131) Nitriding steel, preferably tempered above 610°C e.g. 31CrMoV9 (1.8519)

unsuitable materials
Sheet material: Micro-alloyed (HSLA) steel with Vanadium (V) and Titanium (Ti)
Rod material, High nickel alloyed steel to achieve high core strength e.g. 20NiCrMo2-2 (1.6523).

stainless steel and chrome alloy steels
For stainless steel types as well as alloyed chromium steels, please refer to:

For the Nitrotec® treatment of tool steel, cast iron and sintered material, it is recommended to seek advice from our engineers via the contact page.

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