DAIKOFCW 1Ni

FCAW
  • CRYOGENIC STEELS
1Ni

Description

Rutile-cored flux wire for all positions
Rutile-cored flux wire, suitable for welding and cladding in all positions thanks to its fast-freezing slag. Designed for low-alloy steels containing 1% Ni and fine-grain steels used down to -60 °C, it is ideal for offshore structures, pipelines, and pressure vessels, even where post-weld heat treatment (PWHT) is not feasible. It ensures excellent wetting behavior and smooth, well-profiled weld beads. A single current/voltage setting can be used for all welding positions. The fast-freezing slag enables deposition rates up to three times higher than those achievable with any other manual arc welding process.
Specifications
ISO 17632-A
T 46 6 1Ni P M21 2 H5
AWS A5.29
E81T1-Ni1M H4
Shielding
M21
Positions
PA, PB, PC, PD, PE, PF, PG
Current
DC+
Asme qualifications
F-No (QW432)
5
A-No (QW442)
10
Chem. Comp. %
0
C
0.06
Mn
1.2
Ni
0.95
P
0.02
S
0.02
Mo
0.05
Si
0.45
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
570
Yield strength Rp0.2 MPa
500
500
Elongation A (L0=5d0) %
17
22
Impact Charpy ISO-V
47J @ -60°C
50J @ -60°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
1.6 mm
Ampere
100A - 300A
160A - 420A
Voltage
16V - 28V
31V - 35V
Packaging
Ø 1,2÷1,6mm
Ø 1,2÷1,6mm
Packaging Type
BS300 spool
BS300 spool
1Ni
Description

Application

For welding higher-strength steel structures in situations where post-weld heat treatment (PWHT) is impractical, requiring welds with a suitable level of toughness and crack resistance. The addition of approximately 1% Ni contributes to microstructural refinement, enhancing tolerance to procedural variations compared to plain carbon-manganese (CMn) weld metal. Nickel also improves resistance to atmospheric weathering and enhances electrochemical balance between the weld and base metal, minimizing preferential corrosion in marine environments. In cases of offshore oilfield sour service, a maximum of 1.0% Ni is often required (NACE MR0175). This consumable is recommended for applications where design specifications mandate toughness testing of higher-strength low-alloy steel welds down to –50°C, such as in offshore construction, pipelines, and pressure vessels. Preheat requirements will depend on the grade and thickness of the base material.

Alloy Type

Low alloy steel alloyed with nominally 1%Ni for improved toughness. Actual Ni content is kept below 1% to ensure conformance with NACE MR0175.

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 1 % Nickel.
  • EN W.Nr.: S460N (1.8901), S355N (1.0545), S460NL (1.8903), S460QL (1.8906)
  • ASTM: A333 & A334 gr. 6, A350 gr. LF2 & LF5, A352 gr. LCB & LCC (cast), A572 gr.50
  • API: 5L X65

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