MIG Filler Metal Support

AWS classification pages for MIG / GMAW MIG wire. Browse by base metal family, then open the AWS page for use notes and Amazon searches by diameter.

MIG / GMAW 30 classification pages AWS spec family called out

Carbon steel

AWS A5.18 ER70S-2

Mild steel and carbon steel

AWS A5.18 ER70S-3

Clean mild steel and carbon steel

AWS A5.18 ER70S-6

Mild steel and carbon steel

AWS A5.18 ER70S-7

Mild steel needing extra deoxidizers

Low-alloy steel

AWS A5.28 ER80S-D2

High-strength carbon and low-alloy steels

AWS A5.28 ER80S-Ni1

Weathering or low-temperature steels

AWS A5.28 ER100S-G

High-strength low-alloy steel

AWS A5.28 ER120S-G

High-strength low-alloy steel

Stainless steel

AWS A5.9 ER308L

304 and 304L stainless

AWS A5.9 ER308LSi

304 and 304L stainless

AWS A5.9 ER309L

Stainless-to-mild steel and 309 stainless

AWS A5.9 ER316L

316 and 316L stainless

AWS A5.9 ER312

Dissimilar steels and hard-to-weld stainless repairs

AWS A5.9 ER347

321 and 347 stabilized stainless

AWS A5.9 ER410

410 martensitic stainless

Duplex stainless steel

AWS A5.9 ER2209

2205 duplex stainless

Aluminum

AWS A5.10 ER4043

6061, 6063, and many 6xxx aluminum applications

AWS A5.10 ER4047

Aluminum repair and cast aluminum applications

AWS A5.10 ER5356

5xxx aluminum and many 6xxx applications

AWS A5.10 ER5183

5083 and 5086 aluminum

AWS A5.10 ER5554

5454 aluminum

AWS A5.10 ER5556

5xxx aluminum needing higher strength

Nickel alloy

AWS A5.14 ERNiCr-3

Nickel alloy 600, Inconel 600, and dissimilar high-temperature joints

AWS A5.14 ERNiCrMo-3

Nickel alloy 625 and corrosion-resistant overlays

AWS A5.14 ERNiCu-7

Monel and nickel-copper alloys

Copper / bronze

AWS A5.7 ERCu

Deoxidized copper and copper repair

AWS A5.7 ERCuSi-A

Silicon bronze brazing and copper alloys

AWS A5.7 ERCuAl-A2

Aluminum bronze and wear/corrosion applications

AWS A5.7 ERCuNi

Copper-nickel alloys

Hardfacing / cobalt

AWS A5.21 ERCoCr-A

Cobalt hardfacing overlays

Use note: AWS classifications are used here as practical lookup keys. Always verify the current AWS specification, manufacturer data sheet, WPS, code requirements, base metal grade, shielding gas or current type, diameter, and package size before purchasing or welding.