Comparable specifications
AWS A5.9: ER309LNb
EN ISO 14343-A: 23 12 Nb
Werkstoff Nr.: ~1.4556
Description and applications*
Stainless steel with nominal composition 23Cr, 12Ni, 0.5Nb: it is a niobiumstabilized overalloyed filler metal suitable for overlay welding of carbon and lowalloy steels, where a type 347 of overlay is required.
The all-weld metal microstructure is normally austenite with a small amount of ferrite. It is used for gas shielded and submerged arc-welding. Characterized by smooth drop transfer and stable arc with no spatter losses. Corrosion resistance similar to type 347, it also shows high resistance against moisture pick up.
Mainly used for:
• cladding of carbon steel to achieve a first layer composition similar to that of undiluted 347 stainless steel;
• cladding mild and low alloyed steels in offshore a/o chemical plants in case
AISI 347 or AISI 321 are required as clad layer.
Weldable base materials*
* Illustrative, not-exhaustive list
Steel cladding when chemistry of AISI 347 or AISI 321 is required for the first layer. Overlay welding of 2 .25Cr-1Mo steels.
All-weld metal mech. properties*
* For reference only values
Tensile strength (Rm): ≥ 550 N/N/mm2
Elongation: ≥ 25%
Yield Strength (Rp0.2): ≥ 350 N/mm2
| Chemical composition *For reference only values | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | S | P | Ni | Cr | Mo | Cu | Nb |
| max | 1.00 | max | max | max | 12.00 | 23.00 | max | max | 10xC |
| 0.03 | 2.50 | 0.65 | 0.02 | 0.03 | 14.00 | 25.00 | 0.50 | 0.50 | 1.00 |
| Standard packaging data* | |||||
|---|---|---|---|---|---|
| Welding process | Product type | Dia (mm) | Packing type | Weight kg (lbs) | Length mm (inches) |
| GMAW ** | filler wire | 0.80 - 1.20 (0.030 - 0.047) | spools BS300 / D300 | 15 (33) | n.a. |
| SAW ** | filler wire | 1.60 - 4.00 (1/16 - 5/32) | basket rims B450 | 25 (55) | n.a. |
** GMAW: gas metal arc welding; SAW: submerged arc welding
Marking
Each filler rod for GTAW welding is durably marked with an identification traceable to the unique product type. Welding filler materials wound on spools or in coils are durably marked on the coil or spool with an identification traceable to the unique product type.
The outside of each unit package is suitably labelled with at minimum the following data: grade, diameter, heat, lot no., classifications.
Customized labels are available upon request.
Lot classification
All our productions fulfil the Class S3 requirements acc. to EN ISO 14344.
