HYW ER4043 Aluminum MIG Welding Wire — 1 lb Rolls (4043 / Al-5%Si)

HYW ER4043 aluminum MIG welding wire, supplied on convenient 1 lb rolls — available singly or in 2- and 5-packs. ER4043 is a general-purpose aluminum-silicon (Al-5%Si) filler with excellent fluidity, low crack sensitivity, and a bright finish, ideal for 6xxx-series extrusions, castings, and general fabrication. Select your diameter and pack size from the dropdown. Need a 16 lb spool instead? See our ER4043 16 lb Spool listing.

Key Features

• › AWS A5.10 classification ER4043 (Al-Si, ~5% Si)
• › Convenient 1 lb rolls for small jobs and spool guns
• › Smooth arc, excellent wetting and fluidity
• › Lower hot-crack sensitivity than 5xxx-series fillers
• › Imported and Made-in-North-America options

Ideal Applications

• › 6061, 6063 and other 6xxx-series extrusions and sheet
• › Aluminum castings and cast-to-wrought joints
• › Automotive, marine, and general fabrication / repair

Technical Specifications

Store wire in a dry location and keep rolls sealed to avoid surface oxidation.

Typical Chemical Composition

Typical filler analysis (wt %). Single values are maximums; aluminum is the balance.

Mechanical Properties

Typical as-welded all-weld-metal properties (4043 / Al-5%Si).