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Blue plastic spool holding ten pounds of silver welding wire

Westward

Westward 20AN72 MIG Welding Wire 0.030in ER309LSi 10lb

SKU CH-AA9G-3TCYR

Stainless-steel MIG wire for joining 304, 308 and 309 grades to carbon or low-alloy steel, 0.030 in diameter on a 10 lb plastic spool

  • TypeWelding Supplies
  • Welds stainless-to-carbon joints with ER309LSi classification
  • 030 in wire feeds smoothly in MIG guns
  • 87 ksi tensile strength holds under stress
  • 64 ksi yield strength resists deformation
  • 10 lb plastic spool supports long production runs

Westward ER309LSi MIG Wire 0.030in

This 10 lb spool of Westward ER309LSi welding wire is designed for MIG (GMAW) processes. It carries AWS A5.9 classification and suits fabricators joining stainless steel to carbon steel, low-alloy steel, or stainless steel grades such as 304, 305, 308, 309 and 309S. The 0.030 in diameter feeds through standard MIG guns for general-purpose shop work.

For dissimilar-metal fabrication

Welders who need a single wire for stainless-to-carbon, stainless-to-low-alloy and stainless-to-stainless joints will find this ER309LSi spool convenient. Shops that run only mild steel, aluminium or flux-cored applications should select a wire matched to those base metals instead. The product carries California Proposition 65 warnings for cancer and reproductive harm.

10 lb spool covers extended production runs

A 10 lb plastic spool provides enough wire for long production runs or multiple repair jobs without frequent changeovers. The wire delivers 87 ksi tensile strength and 64 ksi yield strength as welded, giving reliable strength on qualified joints. Very high-volume automated cells may require larger drum packs to minimise downtime.

Highlights

  • Welds stainless-to-carbon joints with ER309LSi classification
  • 030 in wire feeds smoothly in MIG guns
  • 87 ksi tensile strength holds under stress
  • 64 ksi yield strength resists deformation
  • 10 lb plastic spool supports long production runs

Specifications

BrandWESTWARD
TypeWelding Supplies

Questions about this item

What MIG welder specifications do I need to run the 0.030in ER309LSi wire?

Use a MIG welder (GMAW) that accepts 0.030in solid wire on a 10lb plastic spool and can deliver the amperage range recommended for that diameter with stainless steel filler.

Can I use this ER309LSi spool to join 304 or 309 stainless to mild steel with my existing machine?

Yes, the wire is classified for stainless-to-carbon, stainless-to-low-alloy, and stainless-to-stainless joints including grades 304, 304N, 305, 308, 309, 309S.

How do I verify the welds meet the 87ksi tensile and 64ksi yield after I finish a joint?

Check bead appearance for smooth tie-in and minimal spatter, then confirm mechanical properties with a tensile test coupon or refer to your WPS qualification records for ER309LSi.

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