Steel bolts, nuts, and fasteners CorrosionChemistry

A corrosion-resistant solution with sufficient tensile strength

Steel bolts and nuts are used for many applications, including in the food and chemicals sector, because of their high tensile strength. But under aggressive conditions, the corrosion resistance of the components is not enough. This means that stainless steel, which is otherwise very resistant to corrosion, is not strong enough itself. Chromin sought a corrosion-resistant solution that met the mechanical requirements.


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Hard inchromizing (CM 3009) the components creates a very hard surface of 2000 HV with a high corrosion resistance. To meet the mechanical requirements, we refined the parts after the hard inchromizing (hardening and tempering), extending the service life to more than three years. 

Food, chemistry, general mechanical engineering
Tensile strength under aggressive conditions
Strong and corrosion-resistant
Research, treatment, testing, production
Dimensions and material
DIN: 1.7220/1.7224 Class 8.8 to 12.9, ΓΈ 30 x 200 mm
Hard inchromizing (CM 3009)

The best treatment for extremely wear-resistant parts with a hard and dense structure and good running characteristics. Dimensional changes are minimal.

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