Sandvik 23.11.LNb is a niobium stabilized chromium-nickel strip electrode particularly suited for high speed electro-slag welding (ESW) to deposit a single layer overlay of stabilized corrosion resistant alloy of 19%Cr/9%Ni composition on carbon- and low alloyed steels. It can also be combined with Sandvik 19.9.LNb for surfacing of two layer overlays.
- ISO 14343: 23 12 L Nb
- AWS A5.9/ASME SFA5.9: EQ”309LNb”
Contact your nearest sales office for details,
Chemical composition (nominal) %
Sandvik 21.11.LNb is mostly used for corrosion resistant weld surfacing of components petrochemical industries at service temperatures up to 850°C but is also used in the chemical and nuclear industries. Typical components are pressure vessels, heat exchangers, shafts, industrial piping etc.
It is often used as transition layer on which a second layer is welded, using 19.9.LNb for better corrosion resistance.
Weld metal characteristics
Typical chemical composition of single layer obtained on C-Mn steel and low-alloy steel.
|Welding process and consumable||Type of overlay||C||Cr||Ni||FN, WRC|
|SAW Sandvik 23.11.LNb/Sandvik10SW||E347||≤0.06||18.0-20.0||9-10.5||5-8|
|ESW Sandvik 23.11.LNb/Sandvik 49S||347, E347||≤0.05||18.0-20.0||9-10.5||5-8|
Consider the figures as examples. Parameters selected and conditions influence on the result. Contact Sandvik for details and guidelines.
Passes side bend testing according to ASME Section IX.
- The resistance to general corrosion is good. It is a general purpose overlay for mildly corrosive media, also at elevated temperatures in, for example, the petrochemical industry
- The resistance to intergranular corrosion in Strauss testing (ASTM A262 Practice E) is good also after post-weld-heat-treatment (PWHT)
- In pitting corrosion applications Mo-alloyed strip electrodes shall be selected
Contact Sandvik for more information.
For electro-slag welding (ESW) and submerged arc welding (SAW), weld fluxes are used for protective shielding of the weld metal.
Recommended fluxes for Sandvik 23.11.LNb
|Sandvik 49S||ESW-High speed|