ENI 425 is a Ni-Cr-Mo alloyed covered electrode that deposits weld metal with a composition of Ni-22Cr-9Mo-3.5Nb. It is specifically designed for welding highly corrosion-resistant Ni-Cr-Mo alloys such as Alloy 625, 825, and similar materials.This electrode demonstrates excellent toughness at cryogenic temperatures as low as -196°C, making it suitable for welding cryogenic nickel alloys, such as X1NiCrMoCuN25-20-7.The weld metal is resistant to oxidation up to 1200°C in sulfur-free atmospheres and can be used at service temperatures up to 500°C in sulfur-containing environments. It offers high resistance to stress corrosion cracking, pitting, and crevice corrosion in environments containing phosphoric acid, organic acids, seawater, and highly polluted conditions.The weld metal is insensitive to cracking and exhibits excellent resistance to thermal shocks. ENI 425 is used for joining dissimilar nickel alloys, welding dissimilar stainless steels, joining low-alloy steels to stainless steels or nickel alloys, and for buffering and cladding applications. It is also ideal for repair welding of these materials.
Standards and classifications
AWS/ASME SFA - 5.11
ENiCrMo-3
EN ISO 14172
E Ni 6625
TS EN ISO 14172
E Ni 6625
Base materials
DIN
Material
NiCr22Mo9Nb
2.4856
NiCr21Mo
2.4858
X10 CrNiAITi 32 21
1.4876
X8 Ni 9
1.5662
Typical chemical values of weld metal
Type of Analysis
C
Si
Mn
Cr
Ni
Mo
Fe
NbTa
Weld Deposit
0.02
0.45
0.65
20.50
66.00
9.00
0.40
3.40
Typical mechanical values of weld metal
Test Condition
Yield Strength (N/mm²)
Tensile Strength (N/mm²)
Elongation A5 (%)
Charpy V-Notch Properties (J)
As welded
520
780
42
20°C → 75
-196°C → 70
Welding positions
PAPBPCPDPEPF
Polarity
DC(+)
Welding parameters and efficiency
Diameter x Length (mm)
Current (A)
2.50x300
55 - 75
3.25x350
65 - 110
4.00x350
80 - 140
Variants and packaging
Product Code
Diameter X Length (mm)
Pieces per Box (~)
Weight Of The Box (kg)
Boxes Per Package
Weight Of The Package
Packaging Type
16007GJEM2
2.50x300
93
1.8
10
18.5
VAC Box
16007NJEM2
3.25x350
54
2.0
10
22.0
VAC Box
16007QJEM2
4.00x350
35
2.0
10
26.0
VAC Box
Storage and re-drying
It can be dried maximum 5 times.
Generally not required. If required, redry for 1 hour at 300°C.
