DAIKOSTRIP 413

ESW, SAW
  • COPPER ALLOYS
CuNi 70-30

Description

Strip designed for submerged-arc strip cladding of 70Cu 30Ni Alloy.
• This strip is used for multilayer cladding. In case of cladding on C-steel, a buffer layer with DAIKOSTRIP 418 is necessary.
Specifications
AWS A5.7
EQCuNi
Shielding
DAIKOFLUX 940, 942AS, 944
Positions
PA
Current
DC+
Packaging Type
coils standard 30x0,5mm, 60x0,5mm, 90x0,5mm, weight 25-300kg, width and specific weights available on request
Asme qualifications
F-No (QW432)
34
A-No (QW442)
-

Hardness

100HB
Chem. Comp. %
0
Mn
0.8
Ni
31
Cr
0.025
Si
0.1
Fe
0.7
Ti
0.3
Mechanical Properties
min
variant
Tensile strength Rm MPa
345
420
Yield strength Rp0.2 MPa
-
230
Elongation A (L0=5d0) %
0
34
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Description

Application

Suitable for surfacing and cladding, provided there is an appropriate buttering layer, typically either alloy 400 or pure nickel. The 70/30 consumables are applicable for welding 70/30, 80/20, and 90/10 base materials. Matching the strength and color of the 70/30 base materials, they also exhibit overmatching strength compared to the 90/10 alloys. Applications include offshore construction, desalination plants, evaporators, condensers, etc., in salt and seawater processing systems. Preheating is not usually required, with a maximum interpass temperature of 150°C and no post-weld heat treatment (PWHT). It's crucial to meticulously avoid any contamination of the weld zone with foreign materials, especially sources of lead, tin, or zinc, to prevent weld metal cracking.

Alloy Type

70/30 copper-nickel alloys.

Microstructure

Solid solution, single phase alloy.

Materials


EN W.Nr.: 2.0872 (CuNi10Fe), 2.0882 (CuNi30Mn1Fe), 2.0883 (CuNi30Fe2Mn2).
ASTM: C71500, C96400 (cast).
UNS: C71500, C96400, C70600, C96200.
PROPRIETARY: Cunifer 30 (VDM), Cunifer 10 (VDM), Osna®-30 (KME), Osna®-10 (KME).

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