ENiCu–7
1709g ama 1709g

Electrode for welding nickel alloys

AMA 1709G

AWS/ASME SFA – 5.11: ENiCu–7
DIN 1736 : EL–NiCu30Mn

Application/properties:

Basic electrode for joining and surfacing of nickel-copper alloys and of nickel-copper-clad steels. It is also used for joining different materials, such as steel to copper and copper alloys, steel to nickel-copper alloys. Excellent corrosion resistance to chloride induced stress corrosion cracking and a wide range of marine and chemical requirements. These materials are employed in high-grade apparatus construction, primarily for the chemical and petrochemical industries. A special application field is the fabrication of seawater evaporation plants and marine equipment.

Weld metal analysis in % (typical values):

C Mn Si Ti Fe Cu Ni
0.04 3.5 0.7 0.6 2.3 rest 65

Mechanical Properties of all-weld metal:

(single values are typical values)

Tensile Strength
( N/mm )
Yield Strength
( N/mm )
Elongation
A5 (%)
Impact energy(j)
ISO - V
20°C+
>480 > 300 > 30 100

Welding Parameters
Diameter (mm) Length (mm) Amperage (A)
2.5 250 60 – 80
3.25 300-350 90 – 120
4.0 350 110 – 150
5.0 350 140 – 200

Materials:

DIN Standard NiCu30Fe (2.4360), NiCu30Al (2.4375)
other Standard Alloy 400, ASTM B 127, B 165

Rebaking:

required at 300°C for 2 hours.