Low carbon, molybdenum-bearing austenitic stainless TIG wire (ER316LSi), precision drawn to a tight diameter tolerance for smooth, predictable feeding on both standard and pulse TIG machines.
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IRONWELD 316LSi Stainless Steel TIG Wire, Pulse Ready | 5kg
Low carbon, molybdenum-bearing austenitic stainless TIG wire (ER316LSi), precision drawn to a tight diameter tolerance for smooth, predictable feeding on both standard and pulse TIG machines. This is the wire fabricators reach for when a weld needs to hold up in a corrosive environment, not just look clean on the day.
Why 316LSi:
The "L" designates extra-low carbon (0.03% max), which matters because standard 316 wire can suffer carbide precipitation at grain boundaries during welding, a condition that leaves the heat-affected zone vulnerable to intergranular corrosion down the track. Dropping the carbon content avoids that risk entirely, which is why 316LSi is the standard choice rather than plain 316 for anything welded rather than just fabricated. The added silicon (the "Si") does the practical work at the torch: it increases weld pool fluidity and wetting action, giving a smoother, brighter bead with less undercut and less post-weld cleanup, particularly useful on thinner gauge sheet.
The molybdenum content (2-3%) is what separates 316LSi from 308L or 309L wire, giving it meaningfully better resistance to pitting and crevice corrosion in chloride environments, which is why it's the default for marine fittings, food and beverage processing equipment, chemical plant, and anything that sees saltwater or acidic exposure.
Pulse ready:
Consistent wire diameter and a clean, oxide-free surface finish matter more on pulse TIG than on standard DC TIG, since pulse machines are cycling current at set frequencies and any variation in wire feed shows up as inconsistent penetration or bead ripple. This wire is drawn to the tighter tolerance pulse welding demands, so it feeds evenly whether you're running a manual cold-wire feed setup or an automated/orbital TIG pulse system.
Specifications:
Classification: ER316LSi (also referenced as 19.12.3.LSi)
Composition: ~19% Cr, 12% Ni, 2-3% Mo, elevated Si
Carbon content: 0.03% max
Process: TIG (GTAW), suitable for pulse TIG
Shielding gas: Pure Argon
Spool weight: 5kg
Typical base metals: 316, 316L, 316Ti and similar austenitic stainless grades
Applications: food and beverage processing, chemical and process plant, marine fittings and shipbuilding, architectural stainless structures
Ideal for: fabricators welding stainless equipment for marine, food-grade, or chemical-exposure environments, and shops running pulse TIG for thin-gauge or cosmetic stainless work.
