UTP 7015
Heat treatment
The preheating must be matched to the parent metal. Any thermal post-treatments can be applied
without regard for the weld metal.
Welding instructions
Opening angle of the prepared seam approx. 70°, root gap approx. 2 mm. The electrode is welded
with a slight tilt and short arc. Use string beads welding technique. The interpass temperature
of 150° C and a max. weaving width 2,5 x diameter of the electrode core wire should not be
exceeded. Re-dry electrode prior welding for 2 – 3 h at 250 – 300° C, welding out of a hot electrode
carrier.
Approvals : TÜV, GL, DNV, C
Current adjustment :
Welding positions :
PA PB PC PE PF
Standards : Material No. : 2.4807
DIN 1736 : EL-NiCr15FeMn
EN ISO 14 172 : Ni 6182
(NiCr15Fe6Mn)
AWS A5.11 : E NiCrFe-3
Current type : DC (+)
Application field
UTP 7015 with controlled cobalt content is employed for joining and surfacing of nickel-base
materials. UTP 7015 is also recommended for welding different materials, such as austenitic to
ferritic steels, as well as for weld claddings on unalloyed and low-alloyed steels, e. g. for reactor
construction.
Welding characteristics and special properties of the weld metal
Weldable in all positions, except vertical down. Stable arc, good slag removabiltiy. The seam is
finely rippled and notch-free. The weld deposit has a fully austenitic structure and is high-temperature
resistant. Not prone to embrittlement either at high or low temperatures
Weld metal analysis in %
C
< 0,04
Si
0,4
Mn
6
Cr
16
Fe
6
Nb
2,2
Ni
balance
Electrodes
Amperage
&Oslash; mm x L
A
2,5 x 300
50 – 70
3,2 x 300
70 – 95
4,0 x 350
90 – 120
5,0 x 400
120 – 160
Yield strength
Rp0,2
MPa
> 380
Tensile strength
Rm
MPa
> 620
Elongation
A
%
> 35
Impact strength
Kv Joule
-20° C 196° C
> 80 > 65
Hardness
HB
approx. 170

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