Aluminium No 15 [4043A] x 1.6mm x 1Kg

Description

Product Description

SIFALUMIN No 15 

EN ISO 18273  BS: 2901S Al 4043A (AlSi5),   4043A, (NG21) 

An aluminium alloy with 5% silicon, offering excellent flow characteristics and penetration.  Suitable for welding duralumin 

cast (LM25) and wrought alloys 6063 (H9), 6061 (H20) and 6082 (H30).  Weld will discolour if anodised.  Can be used 

TIG or Oxy Acetylene.  If used with Oxy Acetylene, use Sif No. 36 Aluminium brazing and welding flux.   

WELDING POSITIONS 

Ensure that the parent metal surface is cleaned and fully 

degreased prior to welding. Clean joints with a stainless 

steel brush. 

TYPICAL WELD METAL COMPOSITION  

Si 5 % 

Al Bal 

Melting Point 635°C

TYPICAL MECHANICAL PROPERTIES

Ult Tensile Strength 120 N/mm²     

MATERIAL TO BE WELDED

Suitable for welding duralumin, cast and wrought alloys 6063 (H9), 6061 (H20) and 6082(H30), as well as other ‘4 series aluminiums. 

The resulting weld will discolour if anodised [If the finished article is to be anodised, use 1050A, or 5356]. Pre-heating up to 120oC may be necessary, subject to material size and thickness. Wire brushing between passes is recommended, to remove build up of surface oxides.