Sandvik 29.9.R (Covered electrodes)
Datasheet updated 2012-08-03 09:08:17 (supersedes all previous editions)
Sandvik 29.9.R is a covered electrode with rutile-basic coating and about 110% metal recovery giving a duplex (ferritic-austenitic) all weld metal. It is used for welding of dissimilar materials, high carbon and manganese steels like tool steels as well as surfacing. Sandvik 29.9 R is also used for overlays on hot forming steels and as a universal electrode for repair and maintenance work.
Scaling resistant up to 1150oC (2100oF). Spray transfer gives a bead with a finely rippled surface. Little spatter and very good slag removal.
Standards
- AWS E312-16
- EN number E 29 9 R
Product standards
- EN ISO 1600
- ASME/AWS SFA5.4
Chemical composition - weld metal
The following data are valid for non heat-treated all-weld metal.
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
|---|---|---|---|---|---|---|
|
<0.10
|
0.8
|
1.5
|
<0.04
|
<0.025
|
28.5
|
10
|
Microstructure - weld metal
Austenitic matrix with a ferrite content of about 30%.
Mechanical properties - weld metal
|
Temperature
|
°C
|
20
|
|---|---|---|
|
Yield strength, RP0.2
|
MPa
|
600
|
|
Tensile strength, RM
|
MPa
|
720
|
|
Elongation, A5
|
%
|
25
|
|
Reduction of area
|
%
|
25
|
|
Impact strength, Charpy V
|
J
|
50
|
|
Hardness, Vickers
|
220
|
Corrosion properties - weld metal
Sandvik 29.9.R is resistant to intercrystalline corrosion according to DIN 50914 in the as-welded and quench-annealed condition.
Marking
| Printing |
Sandvik 29.9.R/312-16
|
|---|---|
| Tip colour |
blue
|
Deposition data
|
Electrode diameter, mm
|
2.5
|
3.25
|
4.0
|
|---|---|---|---|
|
Length, mm
|
300
|
350
|
350
|
|
Weights:
kg/100 pcs |
2.0
|
4.0
|
5.9
|
|
kg/box
|
1.6
|
2.0
|
1.9
|
|
Electrodes/box
|
79
|
50
|
32
|
|
Max deposition rate,
kg weld metal/h, approx |
0.9
|
1.3
|
2.0
|
|
Effective value
kg weld metal/kg electrodes |
0.64
|
0.62
|
0.65
|
|
Change value
Electrodes/kg weld metal |
78
|
48.5
|
26
|
|
Burn-off time per electrode
at max current, s |
48
|
56
|
66
|
|
Welding positions
|
diameter <=3.25 mm
|
all except vertical down
|
|---|---|---|
|
diameter >=4.0 mm
|
preferably flat position
|
|
|
Current/polarity
|
direct current/electrode positive or alternating current at an open circuit voltage of at least 50V
|
|
Further information
| Diameter, mm | 2.5 | 3.25 | 4.0 |
|---|---|---|---|
| Current, A | 50-85 | 80-125 | 110-175 |
| Fume classification *) | R4 | R5 | R6 |
*)According to Swedish standard (SS) 06 28 01
Redrying of the electrodes when necessary: 2h/300 oC
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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