DAIKOWS 418

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  • NICKEL ALLOYS
Monel 400

Description

Solid wire for welding alloy 400 and similar materials
It is designed to match Monel alloy 400 with raised level of Mn and Ti to suppress hot cracking and porosity. It is suitable for welding Monel 400 to itself and to others Ni-Cu alloys, for example pure nickel and cupronickel. Normally buttering in dissimilar joints and buffer layer in cladding are made with pure nickel or with 625 alloy. Applications include offshore and marine construction, heat exchangers, piping, desalination plant, chemical, petrochemical and power engineering industries.
Specifications
ISO 18274
S Ni 4060
AWS A5.14
ERNiCu-7
Shielding
DAIKOFLUX 960-W
Positions
PA, PB, PC
Current
DC/AC
Packaging Type
K415 spool and drums.
Asme qualifications
F-No (QW432)
42
A-No (QW442)
-
Chem. Comp. %
DEFAULT
C
0.03
Mn
3.2
Ni
64
Al
0.1
P
0.005
S
0.005
Si
0.2
Cu
29
Fe
1
Ti
2.2
Mechanical Properties
min
variant
Tensile strength Rm MPa
480*
720
Yield strength Rp0.2 MPa
0
450
Elongation A (L0=5d0) %
0
45
Impact Charpy ISO-V
-
60J @ -196°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.4 mm
Ampere
300A - 410A
Voltage
27V - 33V
Packaging
Ø 1,6÷3,2mm
Packaging Type
K415 spool and drums.
Description

Application

Weld metal derived from Monel alloy 400, enhanced with elevated levels of Mn and Ti to counteract hot cracking and porosity, employed for welding alloy 400 and similar materials within the Ni-Cu alloy system, such as pure nickel and cupronickel. While welds in alloy K500 are acceptable, they fail to match the strength of this precipitation-hardened alloy. Castings of alloy 400 with 1.5% Si or higher are prone to HAZ cracking. In dissimilar joints involving alloy 400 and other alloys or steels, sensitivity to dilution by Fe (20-30%) or Cr (3-6%) can result in diminished ductility in the weld metal near the fusion boundary. Direct welds to mild or low alloy steels are satisfactory with dilution control, although ERNiCr-3 wire is preferable and necessary for stainless and higher chromium alloys. Alloy 400 boasts a beneficial combination of strength, thermal conductivity, and resistance to corrosion by seawater, inorganic salts, sulphuric and hydrofluoric acids, hydrogen fluoride, and alkalis. Its applications encompass heat exchangers, piping, vessels, and evaporators in the offshore, marine, chemical, petrochemical, and power engineering industries. No preheat is required, and a maximum interpass temperature should be maintained at 150°C

Alloy Type

Nickel-copper alloy based on alloy 400 with raised levels of manganese and titanium to suppress hot cracking and porosity.

Microstructure

Solid solution, single phase alloy, slightly ferromagnetic near room temperature.

Materials


EN W.Nr.: 2.4360, 2.4361, 2.4365.
ASTM: A494 M-35-1, A494 M-35-2.
UNS: N04400, N04405, N05500.
PROPRIETARY: Monel® Alloy 400, R405, K500 (Special Metals), Nicorros (VDM).

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