Corrosion and acid resistant

Stainless steels in A4 quality are characterised not only by their corrosion and acid resistance but also by their good workability and other advantageous mechanical properties. norelem offers a wide range of fasteners in the form of bolts, nuts and washers made of this material, which are ideally suited for use in demanding environments.

The term stainless steel is generally associated with particularly resistant metals with non-rusting properties, which are used in hygiene-critical areas, among other things. But there is a wide range of different stainless steels made from over 160 different alloys. The higher the chromium content, the better the corrosion resistance.

A4 stainless steels belong to the group of austenitic steels, which are also called chrome-nickel steels. The alloying of chromium and nickel significantly improves the corrosion and acid resistance of the material. In addition to fasteners made of steel or A2 stainless steel, norelem now also offers products in A4 quality, which are excellent for use in environments with close proximity to salt water - such as shipyards or the offshore sector in general. "The high salt content in the water and in the air make it impossible to use screws with a lower stainless steel quality such as A2, as they would rust immediately," explains Marcus Schneck, Managing Director of norelem.

Other areas of application for the fasteners made of A4 stainless steel can be found in the chemical and food industries due to their excellent acid resistance. But they also offer decisive advantages in the pulp industry, in the renovation of chimneys or in swimming pools.