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WARNING: This product can expose you to chemicals including Nitrogen Dioxide, which is known to the State of California to cause cancer, and Carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

.030" ER 309LSi Harris Products Group Stainless Steel MIG Wire 10 lb Spool

Airgas Part #:HAR309LSE5

Harris Welco

Manufacturer #:309LSE5



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$28.70 /US Pound
Package Size: 10 US pound
$28.70 US Pound
$28.70 US Pound
$287.00 Spool 10 US pound / Spool

Typically in Stock

Item Details

  • 309LSi Stainless steel GMAW (MIG) welding alloy has similar usage as 309L, but the 0.65-1.00% silicon content improves wash and wetting behavior in the gas shielded welding processes. Conforms to AWS A5.9.


  • Welds 304 and similar base metals in wrought or cast form where severe corrosion conditions may exist
  • Sometimes welds dissimilar steels
  • Higher 0.65-1.00% silicon content improves the wetting and washing behavior of the weld metal


  • 87,000 psi tensile strength (as welded)
  • 58,000 psi yield strength (as welded)
  • 48% elongation 60% reduction of area (as welded)
  • 85 HRB Rockwell B hardness (as welded)
  • 160 HB Brinell hardness (as welded)
  • 95 ft./lb. @ room temperature Charpy V (as welded)


  • Welding base metals of similar composition in wrought or cast form, welding type 304 and similar base metals and some dissimilar steels

Product Attributes

AWS Classification

» ER 309LSi


» .030"


» 10 lb

Trade Name

» Harris Products Group


» Spool