SAF Altig AlSi5 description: ALTIG AlSi5 is a 4043 type aluminum solid TlG welding rod depositing Al-5Si weld metal. Suitable for use with Ar, or Ar+He mixed shielding gases. ALTIG AlSi5 is used for welding of aluminium and aluminium alloys with a silicon content up to 7% in both wrought and cast form. Suitable for Al-Mg-Si alloys series 6000 and for dissimilar joining, e.g. 6000/1000 or 6000/3000.