Typical applications and characteristics: N – AL 12 Si an aluminum 12% silicon stick electrode for the fabrication and repair of aluminum silicon alloys. The electrode offers the highest strength in the N – AL electrode range and is particularly suited to the repair and reclamation of alloy casting defects. The special flux coating provides good arc stability and slag fluidity and ensures the removal of surface oxide during welding operation. Depending upon base metal thickness and mass preheating in the range 100 -300°C will be necessary. Particular attention should be paid to the joint region which must be free from any contamination. N-AL 12 Si electrode should be preferably welded in the downhand position to avoid “burn through” and excessive spattering, the electrode should be held perpendicular to the workpiece and a short arc length maintained. Electrode diameter should be roughly equivalent to plate thickness. In order to obtain corrosion resisting joints, slag residues must be reoved by washing the joint in warm water. Since the coating of N- AL 12 Si is hygroscopic, electrodes must be stored in a dry place. Use dry electrodes only!
Redrying: 110°C / 2 hours.
Suitable for: Welding G-Al Si 12, G-Al Si 12 (Cu), G-Al Si 10 Mg, G-Al Si 10 Mg (Cu)
Typical Chemical Composition of Weld Metal (%):
Mechanical properties of all-welded metal (typical values):
0.2 proof stress (N/mm2) |
Yield Strength (N/mm2) |
Elongation (5 x d)% |
Less than 80 |
Less than 180 |
Less than 5 |
Size and Recommended Current Range (DC +):
Diameter (mm) |
2.5 |
3.2 |
4.0 |
5.0 |
Length (mm) |
350 |
350 |
350 |
350 |
Ampere |
MIN |
60 |
80 |
110 |
150 |
MAX |
90 |
110 |
150 |
180 |
Welding Positions:
FLAT, FILLET
PACKING:
PLASTIC CONTAINER OR STEEL CAN |
