ER4010; AMS 4181 (Premium)
UNS A 94008
AMS 4188/4
AMS 4218
ER4008 (Premium)

Aerospace Material Specification 4181, Aluminum A356, includes aluminum alloy in two forms of welding wire. Typically used as a filler metal for gas-tungsten-arc and gas-metal-arc welding of aluminum of similar composition, heat treatment, and corrosion resistance; although, usage is not limited to such applications.

AMS 4181 is divided into Alloy 4008 and Alloy 4010.

Alloy 4008 is used in large quantities for sand and permanent mold castings. Contains more stringent chemistry than Alloy 4010. Alloy 4008 is typically used for high strength applications in the automotive industry.

Alloy 4010 is similar to Alloy 4008 but holds a lower Iron content, allowing for higher tensile properties.

                                                                                             Chemical Composition: 

MgTiFeAlCuZnMnBeOther impurityOther element
0.3-0.450.04-0.150.09 maxBal0.05 max0.05 max0.05 max0.00080.05 max each0.15 max each
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Aluminum A356, ER4008, AMS 4181 data sheet