Skip to main content

Welding of low alloyed steel

Oerlikon 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 Oerlikon range of welding consumables please contact our service engineers to help you to choose the right one.

HYSS (High Yield Strength Steel) also named HSLA (High-Strength-Low-Al

HYSS steels define a family of steels having a minimum of 500 MPa Yield Strength.
They have been used successfully over the last years for applications involving structural steel welding; these include for instance submarines, offshore construction, bridges, cranes, ships, load-carrying vehicles and equipment,….
The actual trend is therefore an increasing interest in the use of higher strength steels (i.e. 690 MPa and over), enabling a further increase in the strength to weight ratio and associated savings in materials, transportation and manufacturing costs.
A complete range of welding consumables for these steels is proposed by Oerlikon and are presented by processes and by level of Yield Strength.

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.

Oerlikon provides a complete range of consumables for welding these steels.

  • MMA electrodes TENCORD range
  • TIG rods CARBOROD NiCu
  • MIG/MAG solid wire: CARBOFIL NiCu
  • MIG/MAG flux cored wire: FLUXOFIL 18HD, FLUXOFIL 48 or FLUXOFIL M48
  • SAW wire/flux combination FLUXOCORD 48HD/OP 121TT or OP 132

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.

Oerlikon provides a complete range of consumables for welding these steels.

  • MMA electrodes: CROMOCORD and OE KV ranges
  • TIG rods: CARBOROD Mo, CARBOROD CrMo, CARBOROD KV, CARBOROD W 225V ranges
  • MIG/MAG solid wire: CARBOFIL Mo, CARBOFIL CrMo, CARBOFIL KV, ranges
  • MIG/MAG flux cored wire: FLUXOFIL 25, FLUXOFIL 35, FLUXOFIL 36, FLUXOFIL 37 and FLUXOFIL 38C
  • and various SAW wire/flux combinations

TENACITO double coating electrodes

A technical improvement invented by Oerlikon

During electrode manufacturing the two coatings are pressed simultaneously in a single extrusion operation. Both coatings have a different chemical compositions but very complementary and give a better technical result.

What are the advantages of the double coated technology ?
  • Very stable arc and insensitive to the effects of arc blow.
  • Sustained and high quality fusion with a very low welding current setting.
  • Excellent operator appeal.
  • Exceptional wetting even at low current.
  • High flexibility for irregular gap.
  • High metallurgical deposit purity.