INTRODUCTION

A primary use for Aufhauser Aluminum 4643 is in the welding of heavy sections of certain aluminum alloys when multiple weld passes are used and dilution of the base metal into the puddle is negligible. Post weld solution heat treatment and artificial aging may develop 90% of the tensile strength of the unwelded base metal in alloys 6061, 6063, 6070, and 6071. This alloy could also offer advantages in brazing type applications on thin sections where dilution ratios are low. Welds made with AL4043 or AL4643 filler metal should have approximately equal performance in the as-welding condition. AL4643 is very similar in weldability to AL4043. The weld cracking characteristics, flow, pre-cleaning and machine settings are the same for this alloy as for AL4043. The corrosion resistance is very good and equals or exceeds AL4043 in the weld zone and heat affected regions.

 

APPLICATIONS

• Welding filler wire

 

GENERAL INFORMATION

• Non-Heat treatable
• Principle alloying elements: Silicon, Magnesium

 

Chemical Composition

Silicon	Iron	Copper	Beryllium	Manganese	Magnesium	Zinc	Titanium	Each	Total Other	Aluminum
3.6-4.6	0.8	0.1	0.0008	0.05	0.10-0.30	0.10	0.15	0.05	0.15	Remainder