3Ni
Application
These consumables are specifically designed for the welding of low-alloy steels containing 3.5% Ni. They are ideal for the construction of cryogenic plants, pipelines in the petrochemical industry, and for general applications requiring reliable performance at low temperatures, down to -80 °C. It is important to preheat according to the base material and the thickness of the piece to be welded. Although AWS (American Welding Society) specifications often require post-weld heat treatment (PWHT), many welds can be left in the "as-welded" state. The necessity for PWHT is generally determined by the relevant and applicable design codes.
Alloy Type
Nominally 3.5% Ni low alloy steels.
Microstructure
In the as-welded condition the microstructure is
ferritic with a component of acicular ferrite for
optimum toughness.
Materials
Low temperature applications, fine-grained steels that contain up to 3.5% Nickel.
- ASTM: A203 gr. D, E, F, A350 gr. LF3, A352 gr. LC3, A333 Gr. 3
- UNS: K22103, K21703, J42015
Products of the line 3Ni
| Product name | Process | AWS specifications | EN ISO specifications | |
| DAIKOWT 3Ni | GTAW |
AWS A5.28
ER80S-Ni3 |
EN ISO 14341-B
W 57 P 7 M22 SN71 |
|
| G-TECH 3Ni | SMAW |
AWS A5.5
E8018-C2 |
EN ISO 2560-A
E 50 6 3Ni B 42 |
|
| DAIKOFCW 3NiB | FCAW |
AWS A5.29
E80T5 G H4 |
EN ISO 17632-A
T 46 10 3Ni B M 3 H5 |
|
| DAIKOWM 3Ni | GMAW |
AWS A5.28
ER80S-Ni3 |
EN ISO 14341-B
G 57 P 7 M22 SN71 |
|
| DAIKOWS 3Ni | SAW |
AWS A5.23
ENi3 |
EN ISO 14171-A
S2Ni3 |
