DAIKOWM 3Ni

GMAW
  • CRYOGENIC STEELS
3Ni

Description

Solid wire for welding 3%Ni steel
Wire rod 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 -70°C.
Specifications
ISO 14341-B
G 57 P 7 M22 SN71
AWS A5.28
ER80S-Ni3
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)
5
A-No (QW442)
10
Chem. Comp. %
DEFAULT
C
0.1
Mn
1
Ni
3.5
P
0.01
S
0.01
Mo
0.03
Si
0.6
Cu
0.12
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
620
Yield strength Rp0.2 MPa
490
540
Elongation A (L0=5d0) %
17
24
Impact Charpy ISO-V
27J @ -70°C
50J @ -70°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.
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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