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Welding of low alloyed steel

SAF-FRO solutions for low alloyed steels welding and cutting applications

Low alloyed steels are steels containing a low percentage (generally up to 8 %) of alloying elements (Chromium, Nickel, Molybdenum, Manganese, Vanadium….). The addition of these alloying elements gives specific attributes to the low alloyed steels, for example Mo increases material strength, Ni adds toughness, Cr improves temperature strength, hardness and resistance to corrosion. The low alloyed steels are widely used in a large number of industrial applications such as : earthmoving and construction equipment (cranes), ships, submarines, bridges, pipelines, oil drilling platforms, pressure vessels.

Thermal cutting of the low alloyed steels can be performed with oxy-fuel process, but plasma cutting will be preferred due to reduction of the heat affected zone.
The assembly by welding of the low-alloyed steels is possible with almost all the arc welding processes and the required equipment are described above in the unalloyed steel section.
The right selection of the filler metal is critical to obtain good weld quality.
A large number of filler metals are available in the SAF-FRO range of welding consumables please contact our service engineers to help you to choose the right one.

Weathering steels

Weathering steels define a group of steels that have been developed to allow increased resistance to atmospheric resistance. The weathering steel produces a protective layer on its surface. Best known under the name of Corten these steels are used in large structural construction, bridge and in marine transportation such as containers.

Heat resistant steels

Heat resistant steels are used in applications where resistance to increased temperatures is critical. The steel is hard wearing and offers a resistance to large variations in temperature. Industrial applications include furnaces, heat exchangers and incinerators where temperature can reach in excess of 1100 °C. These steels include corrosive resistance, creep resistance, oxidation resistance and hydrogen brittleness. Composition of these steels comprises nickel, titanium, chromium (for corrosion resistance) and molybdenum (for greater tensile strength and heat resistance.