DAIKOWT Al 99.7

GTAW
  • ALUMINIUM ALLOYS
Al

Description

Rod for welding in pure and nearly pure aluminum
Rod in very pure aluminum, developed for the food, electrical, chemical industries, and for metallization. Offers good fluidity and superior corrosion resistance. Ideal for welding pure aluminum (maximum 0.5% of alloying elements) and related alloys.
Specifications
EN ISO 18273
S Al 1070 A
AWS A5.10
ER1070
Werkstoff Number
3.0259
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
AC
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
21
A-No (QW442)
-

Hardness

18HB - 25HB
Chem. Comp. %
DEFAULT
Mn
0.03
Si
0.2
Cu
0.004
Fe
0.25
Ti
0.03
Zn
0.03
Mg
0.03
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
80
Yield strength Rp0.2 MPa
0
35
Elongation A (L0=5d0) %
0
30
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.6 mm
2.4 mm
Ampere
60A - 90A
125A - 160A
Voltage
-
-
Packaging
Ø 1,2÷4,0 mm
Ø 1,2÷4,0 mm
Packaging Type
5kg carton tube
5kg carton tube
Al
Description

Application

Aluminum consumables designed for the welding of primarily pure aluminum-based alloys, containing a maximum of 0.5% alloying elements. The addition of titanium acts as a grain refiner, providing the material with unique properties such as enhanced corrosion resistance. These characteristics make the alloy ideal for applications in the chemical, construction, and food industries, as well as in electrical engineering and metallization. The alloy is also used in spray, arc, and flame metallization.

Alloy Type

Consumables suitable for welding aluminum and pure aluminum alloys.

Microstructure

Pure aluminum (i.e. with a minimum aluminum content of 99.50%) presents a face-centered cubic (fcc) microstructure.

Materials

  • EN W.Nr.: EN AW-Al 99,0 (1200), EN AW-Al 99,7 (1070A), EN AW-Al 99,5 (1050A), EN AW-Al 99,5 (1350), EN AW-Al 99,8 (1080A)

Welding & PWHT

The surface of a weld typically presents oxides and welding stains. This dirt, gray-black in color, consists of aluminum oxide and magnesium oxide. Before proceeding with further weld passes, it is advisable to remove these stains and oxides, as they can cause fusion defects. Removal is most effective using a wire brush, either manual or electric, that should be clean and dedicated exclusively for use on aluminum. The high melting and solidification rate of the weld metal, typical of the gas metal arc welding (GMAW) process, can lead to the entrapment of gaseous hydrogen in the welds. It is essential to carefully control this aspect to ensure optimal results. For thicker plate materials, preheating to 150 °C is necessary to ensure better performance in welding.

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