DAIKOWM 2Ni

GMAW
  • CRYOGENIC STEELS
2Ni

Description

Solid wire for welding 2%Ni steel
Rod wire designed for welding low-alloyed steels for low temperature applications. Typically, they are used for welding 2.5% Nickel steels and other materials requiring good toughness at temperatures as low as -60°C.
Specifications
ISO 14341-A
G 50 6 M21 2Ni2
AWS A5.28
ER80S-Ni2
Shielding
M20, 21
Positions
PA, PB, PC, PD, PE, PF
Current
DC+
Packaging Type
Drums, B300, D200 and D100 spools.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
10
Chem. Comp. %
DEFAULT
C
0.09
Mn
1.1
Ni
3.5
P
0.01
S
0.01
Mo
0.03
Si
0.55
Cu
0.12
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
590
Yield strength Rp0.2 MPa
500
520
Elongation A (L0=5d0) %
24
25
Impact Charpy ISO-V
47J @ -60°C
50J @ -60°C
Impact Charpy ISO-V
-
-
Welding Parameters
1 mm
1.2 mm
Ampere
100A - 220A
150A - 360A
Voltage
18V - 28V
30V - 34V
Packaging
Ø 0,8÷1,6mm
Ø 0,8÷1,6mm
Packaging Type
Drums, B300, D200 and D100 spools.
Drums, B300, D200 and D100 spools.
2Ni
Description

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.

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