G-TECH 2Ni

SMAW
  • CRYOGENIC STEELS
2Ni

Description

Basic coated electrode with 2,5% Ni
Electrode designed for welding low-alloy fine grain steels and nickel steels with impact requirements down to -75°C. Suitable for the construction of cryogenic plant and pipework in petrochemical industry and for general low temperature applications. Its basic coating ensures excellent positional welding characteristics with good gap bridging ability. The weld pool and slag are easy to control and facilitate the achievement of a clean bead surface even in narrow preparations and in root pass.
Specifications
EN ISO 2560-A
E 46 6 2Ni B 42 H5
AWS A5.5
E8018-C1
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+, AC
Packaging Type
Carton box
Asme qualifications
F-No (QW432)
4
A-No (QW442)
10
Chem. Comp. %
DEFAULT
C
0.06
Mn
1.1
Ni
2.2
P
0.01
S
0.01
Mo
0.05
Si
0.6
Cu
0.1
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
630
Yield strength Rp0.2 MPa
460
460
Elongation A (L0=5d0) %
19
20
Impact Charpy ISO-V
27J @ -75°C
47J @ -75°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4.0 mm
5.0 mm
Ampere
65A - 95A
100A - 140A
130A - 190A
180A - 240A
Voltage
-
-
-
-
Packaging
45 pcs/kg
21 pcs/kg
14 pcs/kg
10 pcs/kg
Packaging Type
Carton box
Carton box
Carton box
Carton box
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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