2Ni
Application
Ideal for fabricating storage tanks, process plants, and associated pipework, especially in scenarios demanding good fracture toughness from as-welded joints, even in temperatures as low as -60°C. The addition of approximately 2.5% Ni enhances microstructural refinement and procedural tolerance compared to plain CMn weld metal. It also supports the formation of a stable patina, meeting the characteristics of weathering steels, offering an alternative to using matching consumables. Preheating should align with the base material and its thickness. While AWS consumable specifications may recommend PWHT, many fabrications may be left as-welded, with the necessity for PWHT generally determined by applicable design codes.
Alloy Type
Nominally 2,5%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 2.5% Nickel.
- ASTM: A203 gr. A & B plate, A333 gr. 6 pipe, A350 gr. LF1 & LF2 forgings, A352 gr. LC2 casting
- API: 5L X52, 5L X56, 5L X60, 5L X65
Products of the line 2Ni
| Product name | Process | AWS specifications | EN ISO specifications | |
| DAIKOWT 2Ni | GTAW |
AWS A5.28
ER80S-Ni2 |
EN ISO 14341-A
W 50 6 M21 2Ni2 |
|
| G-TECH 2Ni | SMAW |
AWS A5.5
E8018-C1 |
EN ISO 2560-A
E 46 6 2Ni B 42 H5 |
|
| DAIKOWM 2Ni | GMAW |
AWS A5.28
ER80S-Ni2 |
EN ISO 14341-A
G 50 6 M21 2Ni2 |
|
| DAIKOWS 2Ni | SAW |
AWS A5.23
ENi2 |
EN ISO 14171-A
S2Ni2 |
