MIG WELD ML4043 (AlSi5) Wire 1.2mm/7kg, BS300

MIG WELD ML4043 (AlSi5) Wire 1.2 mm / 7 kg / ER4043 / BS300

MIG WELD ML4043 wire is a solid silicon-alloyed aluminium welding wire designed for MIG welding of aluminium alloys. Complies with classification EN ISO 18273: S Al 4043A (AlSi5(A)) and AWS A5.10: ER4043, with material number 3.2245. A silicon content of approximately 4.5–5.5% ensures very good fluidity of the weld pool, promotes even spreading of the weld metal, and reduces the susceptibility to solidification cracking.

The welding wire is suitable for joining selected aluminium alloys, particularly AlSi casting alloys and AlMgSi wrought alloys. Its excellent wetting properties are advantageous when welding aluminium castings, profiles, and structural components. Inert shielding gases I1 (argon), I2 (helium) or I3 (argon and helium mixtures) according to EN ISO 14175 are used for welding. Direct current with positive wire polarity (DC+) is used in the MIG process.

MIG WELD ML4043 is used in the production and repair of aluminium castings, automotive components, machine parts, structures, and heat exchangers. It is suitable for welding selected AlSi and AlMgSi alloys, including materials EN AW-6060, EN AW-6061, and EN AW-6082, provided the filler material is appropriate for the required properties of the welded joint. A diameter of 1.2 mm allows for the productive welding of medium-thickness aluminium parts. The wire is supplied in 7 kg packaging on a BS300 spool for professional use.

Note: After anodising, the ML4043 weld metal acquires a dark grey shade. Therefore, the wire is not ideal for visible anodised structures where a colour match between the weld and the base material is required.

Main advantages:

• Aluminium welding wire MIG WELD ML4043
• Classification ER4043 / S Al 4043A / AlSi5(A)
• Material number 3.2245
• Silicon content 4.5–5.5%
• Very good fluidity and spreading of the weld pool
• Reduced susceptibility to crack formation during weld solidification
• Good wetting and fusion of welded surfaces
• Designed for MIG welding of aluminium alloys
• Suitable for welding and repair of aluminium castings
• Application in welding AlSi alloys and selected AlMgSi
• Compatibility with shielding gases Ar, He and Ar/He
• Suitable for automotive components and heat exchangers
• Used in the production of aluminium structures and machine parts
• Diameter 1.2 mm for productive aluminium welding
• Professional packaging 7 kg on a BS300 spool

Classification:

Chemical composition:

Chemical composition according to the technical documentation of the manufacturer MIG WELD ML4043. Values represent the ranges and maximum contents of individual elements, not a chemical analysis of a specific production batch.

Mechanical properties:

Indicative mechanical properties of the pure weld metal according to MIG WELD ML4043 documentation at a temperature of +20 °C. These are not guaranteed test results for a specific delivered production batch.