DAIKOWT 407

GTAW
  • COPPER ALLOYS
CuAlNi

Description

Aluminum-Nickel alloyed copper solid rod
This wire rod deposits is an aluminum bronze alloy used for welding steel and aluminum bronze (copper-aluminum alloys). It is excellent for cladding components undergoing metal to metal wear and for corrosion resistant surfaces. The 5% nickel improves corrosion resistance in heat and rough seawater. Applications include tube sheets, pickling hooks, impellers, valve seats, chemical plants, pulp mills, etc..
Specifications
AWS A5.7
ERCuNiAI
DIN 1733
SG-CuAl9Ni5
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
37
A-No (QW442)
-

Hardness

190HB
Chem. Comp. %
DEFAULT
Mn
0.85
Ni
4.55
Al
8.7
Fe
3.85
Mechanical Properties
min
variant
Tensile strength Rm MPa
480
590
Yield strength Rp0.2 MPa
-
260
Elongation A (L0=5d0) %
0
15
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.6 mm
2.4 mm
Ampere
110A - 150A
175A - 250A
Voltage
-
-
Packaging
Ø 1,6÷4,0 mm
Ø 1,6÷4,0 mm
Packaging Type
5kg carton tube
5kg carton tube
Description

Application

This welding material deposits nickel aluminum bronze and is well-suited for welding both wrought and cast parent materials with a similar composition. These alloys are recognized for their high strength and exceptional resistance to stress corrosion, cavitation erosion, corrosion fatigue, and attacks by acids and chlorides. Applications for this welding material encompass corrosion-resistant and spark-resistant pumps, ship propellers, and heat exchangers used in offshore, marine, and mining equipment. When working with aluminum bronze alloys, preheating is not required, and the maximum interpass temperature should be limited to 150°C. However, it's worth noting that the resistance to hot cracking in thick sections with high restraint may be inferior to plain aluminum bronze. An alternative approach is to fill with CuAl, a higher ductility aluminum bronze, and then cap with CuAlNi. This strategy helps enhance overall performance, particularly in challenging welding scenarios.

Alloy Type

Cu-9%Al-5%Ni bronze for welding similar nickel aluminum bronze alloys.

Microstructure

In the as-welded condition consists of a duplex α + β microstructure.

Materials

Joining aluminum bronze. Weld overlay on steels.
EN W.Nr.: 2.0966 (CuAl10Ni5Fe4), 2.0970 (CuAl10Ni3Fe2-C), 2.0978 (CuAl11Ni6Fe5), 2.0980 (CuAl11Fe6Ni6-C).
ASTM: C63200, C63000 (CA630), C95800 (cast), C95500 (cast), C95520 (cast).

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