Cellulosic electrode is appropriate for welding of large diameter and high strength pipes using the vertical down technique. It is suitable for welding hot , filler and cover passes.
Weld metal analysis in % (typical values):
C
Mn
Si
Ni
Mo
S
P
0.12
0.7
0.13
0.5
0.25
<0.02
<0.02
Mechanical Properties of all-weld metal:
(single values are typical values)
Tensile Strength ( N/mm 2 )
Yield Strength ( N/mm 2 )
Elongation A4 (%)
Impact energy (J) ISO - V 10°C-
>550
> 460
> 19
> 27
Welding Parameters
Diameter (mm)
Length (mm)
Amperage (A)
2.5
350
60 – 80
3.25
350
80 – 120
4.0
350
110 – 140
5.0
350
140 – 200
Materials:
DIN Standard
ST34.7 to ST60.7; StE 210.7 to STE 415.7; StE 415.7 TM to StE 480.7 TM. Root pass up to StE 480.7 TM
EN Standard
L415NB to L485NB, L415MB to L485MB
ASTM Standard
APl Spec. 5 L : X52, X56, X60, X70.
*Preheat and interpass temperature is selected according to grade and thickness of pipe.
