G-TECH 3Ni

SMAW
  • CRYOGENIC STEELS
3Ni

Description

Basic coated electrode for 3,5% Ni steels
Electrode designed for welding low-alloy steels with 3.5% Ni. Suitable for the construction of cryogenic plant and pipework in petrochemical industry and for general low temperature applications down to -80°C. 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. Ease of slag removal reduces post-welding cleaning operations to a minimum.
Specifications
EN ISO 2560-A
E 50 6 3Ni B 42
AWS A5.5
E8018-C2
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+, AC
Packaging Type
Carton box
Asme qualifications
F-No (QW432)
6
A-No (QW442)
10
Chem. Comp. %
DEFAULT
C
0.08
Mn
1.1
Ni
3.2
P
0.01
S
0.01
Mo
0.02
Si
0.7
Cu
0.1
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
680
Yield strength Rp0.2 MPa
500
600
Elongation A (L0=5d0) %
19
20
Impact Charpy ISO-V
27J @ -75°C
40J @ -75°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4 mm
5 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
product.packaging_types.product.packaging_types.product.packaging_types.Carton box
product.packaging_types.product.packaging_types.product.packaging_types.Carton box
product.packaging_types.product.packaging_types.product.packaging_types.Carton box
product.packaging_types.product.packaging_types.product.packaging_types.Carton box
3Ni
Description

Application

These consumables are specifically designed for the welding of low-alloy steels containing 3.5% Ni. They are ideal for the construction of cryogenic plants, pipelines in the petrochemical industry, and for general applications requiring reliable performance at low temperatures, down to -80 °C. It is important to preheat according to the base material and the thickness of the piece to be welded. Although AWS (American Welding Society) specifications often require post-weld heat treatment (PWHT), many welds can be left in the "as-welded" state. The necessity for PWHT is generally determined by the relevant and applicable design codes.

Alloy Type

Nominally 3.5% 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 3.5% Nickel.
  • ASTM: A203 gr. D, E, F, A350 gr. LF3, A352 gr. LC3, A333 Gr. 3
  • UNS: K22103, K21703, J42015

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