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LHR-320 N

LHR-320 N is a NiCu-alloyed electrode,which deposits a weld metal with good corrosion resistance to sea-water and flue gases, for welding of weathering steel (Patinax steel, Cor-Ten A steel, Mayari R steel) and for ship hull construction steel. The weld metal has excellent mechanical properties. It is particularly suitable for welding the shell plating of ice breakers and other ships, which work under conditions where the protective paint coating wears off. Weathering steels are low-alloy steels that can be exposed to the weather without being painted. The steel protects itself by means of a dense oxide coating (patina) which forms naturally on the steel when it is exposed to the weather.

This tight oxide coating reduces continuing corrosion. The corrosion resistance of weathering steels is four to six times that of normal structural carbon steels, and two to three times that of many of the low-alloy structural steels.

3.01

Flue gases corrosion

The weathering steels are covered by the ASTM specification A242. These steels have a minimum yield strength of 350 Mpa (50,000 psi) with an ultimate tensile strength of 490 Mpa (70,000 psi).

To maintain the weather resistance characteristic of the steel, it is important to use an electrode with same chemical composition.

Sea water corrosion

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