DAIKOMCW 1Ni

FCAW
  • CRYOGENIC STEELS
1Ni

Description

Metal all position flux cored wire
Virtually spatter free in the spray-arc range. It is designed for welding low-alloy steels with 1% Ni and fine grain steel as well as for -60°C low temperature applications. Suitable for the construction of offshore platforms, pressure vessels and pipelines and also for welding higher strength steel structures where PWHT is impracticable but toughness and crack resistance are required. The weld profile is easily controllable making this wire well suited for gap bridging and positional welding.
Specifications
ISO 17632-A
T 50 6 1 Ni M M 1
AWS A5.36
E80T15-M21 A8 Ni1 H4
Shielding
M21
Positions
PA, PB, PC, PD, PE, PF, PG
Current
DC+
Packaging Type
BS300 spool
Asme qualifications
F-No (QW432)
6
A-No (QW442)
10
Chem. Comp. %
DEFAULT
C
0.06
Mn
1.3
Ni
1
P
0.02
S
0.02
Mo
0.03
Si
0.5
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
560
Yield strength Rp0.2 MPa
500
500
Elongation A (L0=5d0) %
17
24
Impact Charpy ISO-V
47J @ -60°C
47J @ -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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