- E BK-623

Nickle Alloy Welding Electrode E BK 623

Nickel Alloy Welding Electrode E BK 623 is used for Shield Metal Arc Welding (SMAW). Nickel-based electrode for welding Inconel 600 and similar alloys, cryogenic steels (e.g. 9% and 5% Ni steel), martensitic to austenitic steels, dissimilar steels, heat-resisting steel castings of limited weldability, etc. Good weldability in all positions, including overhead. Special electrode with high nickel content for joining unalloyed and alloyed steel, stainless steel and heat resistant steel, nickel and nickel alloys, and copper and copper alloys. Also suitable for dissimilar welding of these metals. The deposit has very high ductility, is ferrite-free, corrosion resistant, and heat resistant up to high temperatures. Excellent weldability on alternating current.

Applications

Joining dissimilar metals, especially for high thicknesses and rigid joints. Welding of cryogenic steels: vessels and pipes for liquefied gases. Intermediate layer in copper-steel joints. Welding of crack sensitive steel types: roller guides of cement kilns, hydraulic cylinder 

Classification

AWS

A5.11 : E NiCrFe-2

EN ISO 


DIN

1736T1 : EL-NiCr15FeNb

Typical Weld Metal Analysis %

C Mn Fe Cr Ni Nb Mo Si
0.03-0.06% 2.0-2.5% 11.0-12.0% 16-17% 64% 2.0-2.8% 16-17% 0.4%

Mechanical Properties (As Welded)

RP0,2 (N/mm2)
Rm (N/mm2)
A  (%)
          Impact Energy
 +20°C                    -196°C

500 MPa (73 ksi)
780 MPa (113 ksi)
>35
>95                                >70

General Information

Welding process 

Covered Electrode (SMAW)

Alloy Type

Ni-Base CrMoNb

Re-drying Temperature

300°C/2hours

Beads 

Use stringer beads (do not weave).


Cleaning

Remove all cracks and fatigued metal by grinding. 

Welding parameters

Diameter & Length (mm)
Current (A)
2.5x300
70~80
3.2x300
90~120
4.0x350
120~150

 

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