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
EN 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. %
0
C
0.09
Mn
1.1
Ni
2.3
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
1.0 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 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

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