Bostrand 281          
AWS A/SFA 5.10-92      : ER4043

Description and applications

Bostrand 281 is an aluminium/5% silicon solid MIG wire which is used to weld aluminium alloys of the AlMgSi type, and AlSi types with up to 7% Si. Bostrand 281 may also be used to join wrought to cast materials eg BS 1490 LM2 and LM6. The resistance of the weld metal to hot cracking is high.
All-weld mechanical properties - as welded using: Argon or Argon/Helium
Yield stress                                                50 min    MPa
Tensile strength                                          150 min   MPa
Elongation                                                  15 min     %
Chemical composition (wire)
Si      4.5-5.5
Mn     0.05 max
Cr      0.05 max
Cu     0.05 max
Ti       0.15 max
Al      balance
Welding parameters  
Size Current mm amps 1.2
130-220
1.6
170-320

Group equivalent for 0.8mm and 1.0mm - OK Autrod 4043.

Murex Welding Products
Hanover House, Queensgate, Britannia Road,
Waltham Cross, Herts, EN8 7TF
Telephone: (01992) 710000 Fax (01992) 719191