Special materials

We use special alloys for extremely high resistance to aggressive media and corrosion which falls above the normal types of steel. SERTO has extensive know-how in the preparation of other alloys such as Hastelloy® and Monel®, but also Incoloy®, Inconel®, SMO®, Duplex and Superduplex.
Due to the high material costs and demanding processing (for example longer production times, higher wear of coolants and tools), long-standing experience with special alloys is an important pre-requisite for high efficiency. Ask your SERTO advisor for solutions to your challenges!


Hastelloy® is the brand name of a steel alloy from the US company Haynes International Inc. The main agent is today one with the best qualities of the nickel-chrome-molybdenum-group with regard to corrosion, resistance to pitting corrosion or split corrosion.

MaterialHastelloy C-22 (CX2M alloy)
Melting pointapprox. +1350°C
Application (Selection)wastewater treatment, exhaust gas cleaning for incineration plants, oil industry
Suitable for (Medium)wet media with higher temperatures under oxidising and reducing conditions (acids and acid mixtures), high resistance to crevice, pitting and stress corrosion


Monel®, a brand from the US company Special Metals Corporation, is a nickel-copper alloy with high stability and outstanding corrosion resistance, specifically at high flow velocities.

MaterialMonel (2.4360, UNS N 04400, Alloy 400, Nicorros)
Melting pointapprox. +1350°C
Applications (selection)water treatment, ocean-going vessels, oil platforms
Suitable for (Medium)wet media with high flow velocities (seawater, hydrofluoric acid, sulphuric acid, alkalis)


Ecobrass®is a brass without toxic additives such as lead and nickel. It is an excellent material to work with. The mechanical strength properties are in the same range as some special types of steel, which tend to have values exceeding those typical of brass.

MaterialEcobrass® CW 724 R
Melting point+860°C to +925°C
Applications (selection)vehicle construction, food, electrical, electronics and sanitary industries
Suitable for (Medium)non-aggressive or slightly aggressive media in a non-aggressive environment, drinking water

Examples for special materials