DAIKOWT CuAl8

GTAW
  • COPPER ALLOYS
CuAl

Description

Aluminum-bronze copper rod
Solid rod developed for the welding of copper alloys, particularly aluminum-bronze alloys. It is also suitable for welding steel and cast iron and is porosity-free. Preheating is recommended when working on large pieces. Also suitable for spray metallization with wear-resistant surface treatments and for welding galvanized steel sheets. Used in the naval industry for pumps, propellers, and valves where high corrosion resistance in seawater is required, as well as in the automotive industry for welding galvanized sheets and in construction where high mechanical properties are required.
Specifications
EN ISO 24373
S Cu 6100
AWS A5.7
ERCuAl-A1
DIN 1733
SG-CuAl8
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
36
A-No (QW442)
-

Hardness

100HB
Chem. Comp. %
DEFAULT
Mn
0.003
Ni
0.003
Cr
0.004
Nb
0.003
Al
8.2
V
0.002
P
0.001
Si
0.003
Fe
0.01
Mechanical Properties
min
variant
Tensile strength Rm MPa
380
450
Yield strength Rp0.2 MPa
-
190
Elongation A (L0=5d0) %
0
38
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
product.packaging_types.product.packaging_types.product.packaging_types.5kg carton tube
product.packaging_types.product.packaging_types.product.packaging_types.5kg carton tube
CuAl
Description

Application

Designed for welding aluminum bronzes with an aluminum content between 5% and 11%, as well as other copper alloys. When used on brass, the weld joint color is similar, and the aluminum in the consumable helps minimize zinc volatilization during welding. It can also be used for overlaying on C-Mn steels and cast iron, providing surfaces that resist wear and corrosion or for connecting these materials to most copper-based alloys. Typical applications include
corrosion-resistant and non-sparking pumps, ship propellers, machinery components, and heat exchangers used in offshore, marine, and mining environments.

Alloy Type

9% Al bronze for welding similar 5-11% Al alloys.

Microstructure

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

Materials

Aluminum bronze. Beryllium copper: Cu+ 0.5-2%Be. Brass: Cu–Zn. Aluminum brass: e.g. Yorkalbro Cu-22%Zn-2%Al. Manganese bronze: Cu + 20-45%Zn + 1-3%Mn. Silicon bronze: Cu + 1-3.5%Si.
  • EN W.Nr.: 2.0916 (CuAl5), 2.0920 (CuAl8), 2.0928 (G-CuAl9), 2.0932 (CuAl8Fe3), 2.0936 (CuAl10Fe3Mn2), 2.0940 (CuAl10Fe2-C), 2.0960 (CuAl9Mn2), 2.0962 (G-CuAl8Mn), 2.0966 (CuAl10Ni5Fe4), 2.0970 (CuAl10Ni3Fe2-C), 2.0978 (CuAl11Ni6Fe5), 2.0980 (CuAl11Fe6Ni6-C)
  • UNS: C61400

Welding & PWHT

In the case of aluminum bronze alloys, preheating is not necessary. The maximum interpass temperature should not exceed 200 °C. When welding brass, a preheat of 100-300 °C is recommended for thicker sections, while lower temperatures are indicated for high-zinc brass. Although this wire is suitable for various combinations of copper and iron-based alloys, caution is essential to minimize dilution in the presence of high-chromium alloys, such as stainless steels. The limited tolerance to chromium, resulting from mixing, can cause embrittlement and cracking, especially in bend tests. In such cases, applying a low heat input buttering layer is advantageous.

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