2Ni
Application
Ideal for the production of storage tanks, process plants, and related piping, this product guarantees excellent fracture toughness properties in welded joints at temperatures down to -60 °C.
The inclusion of approximately 2.5% Ni enables microstructural refinement and improves tolerance against procedural variations compared to unalloyed C-Mn weld metals. Additionally, it promotes the formation of a stable patina, essential for maintaining the characteristics of weather-resistant steels, thus representing a valid alternative to the use of corresponding consumables.
Preheating should be performed according to the base material and its thickness. While AWS specifications for consumables require post-weld heat treatment (PWHT), many applications can be left in the as-welded condition. The need for PWHT is usually determined by the 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 |
