Sandvik 19.9.LNb (Welding strip)
Datasheet updated 2011-10-13 13:24:16 (supersedes all previous editions)
Sandvik 19.9.LNb is a strip electrode used for the second layer to obtain a corrosion resistant overlay weld deposit on a transition layer of Sandvik 24.13.LNb, 24.13.L, 21.11.LNb or 22.11.L on C-, CMn- and low-alloy steels using submerged-arc welding (SAW) with the fluxes Sandvik 10SW or 10S or electroslag welding (ESW) with the fluxes Sandvik 47S or 49S the high speed flux. It gives a 347/E347 weld deposit. There are also other possible combinations and conditions.
Standards
- AWS EQ347
- EN number B 19 9 Nb
Product standards
- EN ISO 14343
- ASME/AWS SFA5.9
Chemical composition - strip electrode
|
C
max |
Si | Mn | P max |
S
max |
Cr | Ni | Mo max |
Cu max |
Nb |
|---|---|---|---|---|---|---|---|---|---|
|
0.02
|
0.4 | 1.8 | 0.02 |
0.02
|
20 | 10.5 | 0.3 | 0.3 | 0.5 |
Ferrite content
The ferrite content is nominally 11 FN WRC.
Chemical composition of overlay
Typical chemical compositions in the second layer obtained on C-Mn steel and low-alloy steel.
 |
Type of overlay
|
C
|
Cr
|
Ni
|
Nb/C
|
FN, WRC
|
|---|---|---|---|---|---|---|
| SAW 24.13.LNb+19.9.LNb/10SW |
E347
|
max 0,04
|
19-20
|
9,5-10,5
|
8-20
|
5-10
|
| SAW 24.13.LNb+19.9.LNb/10S |
E347
|
max 0,04
|
18-19,5
|
9,5-10,5
|
8-20
|
3-8
|
| ESW 21.11.LNb+19.9.LNb/47S |
E347
|
max 0,03
|
18,5-19,5
|
9,5-10,5
|
10-30
|
4-9
|
| ESW 24.13.LNb+19.9.LNb/49S |
E347
|
max 0,04
|
18,5-19,5
|
10-11
|
10-30
|
3-8
|
| SAW 24.13.L+19.9.LNb/10SW |
E347
|
max 0,04
|
19-20
|
10-11
|
8-15
|
3-8
|
| ESW 22.11.L+19.9.LNb/47S |
E347
|
max 0,03
|
18,5-19,5
|
10-11
|
10-20
|
3-8
|
| ESW 24.13.L+19.9.LNb/49S |
E347
|
max 0,04
|
18,5-19,5
|
10-11
|
10-20
|
3-8
|
Consider the figures as examples. Parameters selected and conditions influence on the result. Please contact Sandvik for details and guidelines
Mechanical properties of overlay
Passes side bend testing according to ASME Section IX.
Corrosion properties of overlay
On par with the base metal 347. The weld overlay is resistant to intergranular corrosion in Strauss testing (ASTM A262 Practice E) also after the commonly applied post weld heat treatments specified for C-, CMn- and low-alloyed steels.
Better corrosion resistance at elevated temperature than 304/304L.
Welding data
| Process/Flux | Size |
Current, A
|
Voltage, V
|
Travel speed, mm/min
|
|---|---|---|---|---|
| SAW/10SW, 10S | 30 x 0.5 mm |
300 - 425
|
28-30
|
80 - 160
|
| SAW/10SW, 10S | 60 x 0.5 mm |
650 - 850
|
28-30
|
80 - 160
|
| SAW/10SW, 10S | 90 x 0.5 mm |
975 - 1275
|
28-30
|
80 - 160
|
| ESW/47S | 60 x 0.5 mm |
1100 - 1400
|
23 - 26
|
130 - 220
|
| ESW/47S | 90 x 0.5 mm |
1650 - 2100
|
23 - 26
|
130 - 220
|
| ESW/49S | 60 x 0.5 mm |
1600 - 2200
|
23 - 26
|
250 - 450
|
| ESW/49S | 90 x 0.5 mm |
2400 - 2800
|
23 - 26
|
250 - 350
|
Direct current, with electrode positive is normally used.
The welding data in the table represent the operation capability of the flux. The desired properties of the overlay are obtained by proper selection of the settings within the ranges.
Applications
Sandvik 19.9.LNb is used for weld surfacing of components in the chemical, petrochemical, nuclear industries where corrosion resistance on level with 347 is needed. Typical components are pressure vessels, heat exchangers, shafts, industrial piping etc.
It is very common in the petrochemical industry.
Approvals
TÜV. Contact Sandvik for information about the extent.
Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Sandvik materials.
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