1075sp ama 1075sp

Aluminum and bronze electrode

AMA 1075SP

AWS/ASME SFA–5.3: E–4043
DIN 1732 : EL–AlSi 5
No. of Material : 3.2245


Electrode with special covering for the welding of aluminum silicon alloys and for joining dissimilar aluminum alloys. The electrode should be held perpendicularly to the workpiece and a short arc length maintained. Plates thicker than 10 mm and larger workpieces require preheating in the range of 150°C to 250°C. Since slag residues arc corrosive, the must be completely removed from the welded bead. Electrode serves well as consumable in oxyacetylene welding. The covering being hygroscopic, the electrode must be stored in an absolutely dry location, or redried if required.

Weld metal analysis in % (typical values):

C Si Fe
Base 5 0.3

Mechanical Properties of all-weld metal:

(single values are typical values)

Tensile Strength
( N/mm )
Yield Strength 0.2%
( N/mm )
160 90 15

Welding Parameters
Diameter (mm) Length (mm) Amperage (A)
2.5 300 60– 90
3.25 350 80– 110
4 350 110– 150


AlMgSi and AlMg -alloys up to 2.5% Mg, AlMnCu, AlSi cast cast alloys.


At 110°C to 120°C for 2 hours