DAIKOWS 3Ni

SAW
  • CRYOGENIC STEELS
3Ni

Description

Solid wire for welding 3%Ni steel
Submerged arc wire 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.
Specifications
ISO 14171-A
S2Ni3
AWS A5.23
ENi3
Shielding
DAIKOFLUX 493-W
Positions
PA, PB, PC
Current
DC/AC
Packaging Type
K415 spool and drums.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
10
Chem. Comp. %
DEFAULT
C
0.1
Mn
1
Ni
3.5
P
0.01
S
0.01
Mo
0.02
Si
0.15
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
630
Yield strength Rp0.2 MPa
-
550
Elongation A (L0=5d0) %
-
24
Impact Charpy ISO-V
-
50J @ -60°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.4 mm
3.2 mm
4 mm
Ampere
300A - 410A
430A - 530A
480A - 580A
Voltage
26V - 30V
27V - 31V
27V - 32V
Packaging
Ø 2,0÷4,0mm
Ø 2,0÷4,0mm
Ø 2,0÷4,0mm
Packaging Type
K415 spool and drums.
K415 spool and drums.
K415 spool and drums.
3Ni
Description

Application

Engineered for welding low-alloy steels containing 3.5% Ni, these consumables prove to be highly effective in various applications. Their primary suitability lies in the construction of cryogenic plants and pipework within the petrochemical industry, as well as for general low-temperature purposes extending down to -80°C. When utilizing these consumables, it's crucial to adhere to a preheating regimen aligned with the specifics of the base material and its thickness. While AWS consumable specifications advocate for post-weld heat treatment (PWHT), it's noteworthy that many fabrications often opt to retain the as-welded condition. The decision on whether to employ PWHT is typically determined by the applicable design codes governing the specific project or application.

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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