3.5 Nickel Electrode

[llalbabu]

Could you please write if the electrode for welding 3.5 Nickel A333 Gr3 material is stopped from production and is not available in the market? Electrodes 7018-C2L / E8016-C2 are designated in our specification. If these electrodes are not available then what is the alternative electrode that can be used as the impact test requirement is -101 deg.C. Can 7018G be used ?
Please advise on an urgent basis.

[Jolly Roger]

Try Lincoln's knowledge base. If you can't find the answer there you can email them and they will give you an answer.

[llalbabu]

Thanks Rogers!
I have written to Lincoln, Esab, Oerlikon and Kobe Steel and yet to receive any reply from them.

[Darmik]

llalbabu 3.5 Nickel Electrode

--------------------------------------------------------------------------------
Could you please write if the electrode for welding 3.5 Nickel A333 Gr3 material is stopped from production and is not available in the market? Electrodes 7018-C2L / E8016-C2 are designated in our specification. If these electrodes are not available then what is the alternative electrode that can be used as the impact test requirement is -101 deg.C. Can 7018G be used ?
Please advise on an urgent basis.


You can use one of these 8018 - C1
designed for welding 2% to 4% nickel bearing steels for low temperatures

OR

8018 C- 2
designed for welding 2% to 4% nickels steels also designed for low temerature

I cant find a 8016 -C2 or 7018 - C2L

[llalbabu]

Hi
Here my contractor is planning to weld with E7018G which has only 0.5% Nickel for root and the rest of passes with E 8018-C2. But can E 7018G be used for welding A333 Gr3 material?
They say that the dilution effect of hot pass will blend the metallurgical properties of E 7018G and hence can be used.

[Darmik]

Hi
Here my contractor is planning to weld with E7018G which has only 0.5% Nickel for root and the rest of passes with E 8018-C2. But can E 7018G be used for welding A333 Gr3 material?
They say that the dilution effect of hot pass will blend the metallurgical properties of E 7018G and hence can be used.

Okay this A333 Gr3 material the only thing that comes close to this is

Nickel steels are 2015,2115,2 1/2% ni steel,2315,2320,2330,2340.

and

medium nickel - Chromium steel and they are 3115,3125,3130,3140,3150,3215,3230,3240,3250,3315, 3325,3435,3450.

I would have to say NO.

[llalbabu]

Darmik
Thanks for throwing some light on the subject.
API RP 582 restricts welding 3.5 Nickel to 3.5 Nickel material with E80XX-C2 or E70XXC2L.
It also seems that E7018G is limited to impact toughness upto -46 Deg.C