2Ni

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.

Nominally 2,5%Ni low alloy steels.

In the as-welded condition the microstructure is ferritic with a component of acicular ferrite for optimum toughness.

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.