Introduction to 1100 Series Aluminum
Aluminum Alloy of 1100 Series belongs to pure aluminum having very good ductility, moderate strength, general-purpose alloy. 1100 alloy offers high corrosion resistance, good ductility compare to other grades, and high reflective finish, and of course economical too compare to other alloyed aluminum grades such as 4XXX, 5XXX, or 6XXX series. The alloy is having good forming properties making it ideal for forming works jobs.
1100 series is not heat treatable type aluminum alloy. The density of this material is 2.71 gm/cm3 and melting temperature is 643 – 657°C.
ASTM: B 209
SAE AMS QQ: A-250/1
Chemical and mechanical properties
Chemical properties of Al 1100
|Weight%||Aluminum||Copper||Silicon + Iron||Manganese||Zinc||Others|
|1100||Remainders||0,05 – 0,020||0,95 max||0,05 max||0,10 max||0,05 (each)|
Welding of 1100 Series Aluminum
The welding of Aluminum 1100 alloy can be carried out using:
The below table shows the filler wire types for various aluminum grades including the 1100 series. ER4043 shall be used when need maximum strength for 1100 alloy welding. ER1100 shall be used for welding alloy 1100 aluminum when maximum ductility, saltwater corrosion resistance, and color match after anodizing is required.
Preheat and interpass during welding
Maximum preheat and interpass temperature of 120ºC shall be used for aluminum welding of Alloy 1100, 3XXX, 4XXX, 5XXX series.
Shielding/ Purging/ Backing gas for Aluminum welding
Pure Argon is widely used. Argon-Helium mixture in MIG welding. Helium addition helps for a better weld formation and increases the welding speed. Helium also minimizes the risk of pores and lack of fusion. Pure helium is not used due to the high Ionisation potential of the gas as well as the high cost of the gas.
Welding parameters for TIG/ MIG welding of Al1100
The selection of welding parameters for aluminum welding depends on wire diameter and material thickness. When welding with 0.030-inch wire diameter, an ampere range of 100-130 amp is used for thickness up to 0.125 inches for aluminum material. Refer to the below table for detailed welding parameters such as current, voltage, wire feed speed, and shielding gas flow rate.