AWS A5.9: ER(309LNb) is a submerged arc welding wire niobium-stabilized similar to AWS A5.9: ER309L with the addition of Nb. Suitable for overlay on carbon and low-alloy steels, when a type 347 overlay is required.

AWS A5.9: ER(309LNb) Submerged arc welding wire 

Chemical Composition (%)

Welding Positions:

Diameter

Smooth finish free from surface defects and foreign matter.

Base Materials

1.6 – 4.0 mm; sizes and tolerances acc. to ISO 544 and AWS A5.9.

Classification:
EN ISO 14343-A: S 23 12 Nb
SFA 5.9 / AWS A5.9: ER(309LNb)

Wire Electrode Surface

Package Forms

Steel cladding when chemistry of AISI 347 or AISI 321 is required for the firstlayer. Overlay welding of 2.25Cr-1Mo steels.

Suitable fluxes: EN 760: SA AF 2 DC, WP 380

Flux type suitability is strongly dependent on its application. In combination with the wire electrode the most suitable flux should match the requirements of the plate material as closely as possible under the existing welding conditions. Further information can be obtained from the technical flux data sheets.

Coils, spools, drums and spiders as standard package forms for SAW-wire electrodes, different package forms on request.