Specifications:
- AWS/ASME SFA A5.4 : E 309Cb-16
- EN ISO 3581-A-E 23 12 Nb R 12
Description and Application
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High CrNiNb alloyed rutile-basic all position buffer electrode.
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Designed for buffering mild and low alloyed steels for nuclear applications. Used as a buffer electrode in AISI 312 and AISI 347 claddings.
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Used for the first run when welding 321 or 347 clad steels, prior to completion with 347 type weld metal.
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Focused and stable arc. Easy slag release.

Typical all weld metal composition [wt%]
C | Mn | Si | Cr | Ni | Nb |
0.04 | 0.90 | 0.80 | 23.50 | 13.50 | 0.80 |
Typical all weld metal mechanical properties
Rp 0.2 [MPa] | Rm [MPa] | A5 [%] | Impact [ISO-V] |
560 | 680 | 32 | 60 J @ 20°C |
Welding positions
RE-DRYING
300°C/2H
Diameter | Length | Current [amps] | ||
in | mm | in | mm | |
5/64 | 2.0 | 12 | 300 | 30-60 |
3/32 | 2.5 | 12 | 300 | 40-70 |
1/8 | 3.25 | 14 | 350 | 70-110 |
5/32 | 4.0 | 14 | 350 | 110-140 |
3/16 | 5.0 | 14 | 350 | 140-180 |