E308LT-1 Stainless Flux-Cored Wire: Buyer's Guide
If you weld stainless steel and want the deposition speed of a wire process without babysitting a TIG puddle, E308LT-1 flux-cored wire is one of the most productive options on the bench. It lays down clean 308L-grade stainless fast, runs in all positions, and forgives a little less-than-perfect joint prep. This guide covers what E308LT-1 actually is, the shielding gas it needs, how to pick wire diameter, where it shines, and how it compares to the gasless version.
What is E308LT-1 stainless flux-cored wire?
E308LT-1 is a gas-shielded, flux-cored stainless steel welding wire classified under AWS A5.22. Breaking the code down: 308 is the alloy family (a low-carbon austenitic stainless used to weld 304/304L and similar base metals), the L means low carbon to resist intergranular corrosion, T means tubular (flux-cored), and the -1 indicates a rutile-type flux designed for all-position welding with a smooth, spray-like arc. Because it is gas-shielded, it must be run with an external shielding gas — it is not a self-shielded wire. It welds on DCEP (electrode positive), the standard polarity for gas-shielded flux-cored stainless.
The flux core does three jobs at once: it shields and stabilizes the arc, deoxidizes the weld pool, and forms a slag that protects the bead as it cools and peels off easily. The payoff is high deposition rates, good gap-bridging, and a tolerant arc that is easier for many fabricators than stainless MIG or TIG.
Shielding gas and wire size
Gas-shielded stainless flux-cored wire is typically run with 100% CO₂ or a 75–80% Argon / balance CO₂ blend. CO₂ gives deeper penetration and is economical; the argon blend produces a slightly softer arc and less spatter. Always confirm the gas called out on your spool's data sheet, since the gas affects the final weld chemistry.
Use wire diameter to match material thickness. The ranges below are typical starting points — always verify amperage and voltage against the manufacturer's data sheet and your own welding procedure.
| Wire diameter | Best for material thickness | Typical use |
| .035" | Thin to medium (≈14 ga–3/16") | All-position work, sheet and light plate |
| .045" | Medium plate (≈3/16"–3/8") | General fabrication, higher deposition |
| 1/16" (.062") | Heavier plate (3/8"+) | Flat/horizontal, maximum fill rate |
Where E308LT-1 is used
- Welding and repairing 301, 302, 304 and 304L stainless steel
- Tanks, vessels, and food, dairy, and beverage equipment
- Railings, handrails, and architectural stainless
- Exhaust systems, ductwork, and general MRO repair
- Any stainless job where deposition speed and all-position capability matter
The low-carbon (L) chemistry is the reason it is so widely specified: keeping carbon low reduces carbide precipitation in the heat-affected zone, which helps the weld resist intergranular corrosion in service.
Gas-shielded (E308LT-1) vs. gasless (E308LT0-3)
HYW stocks both a gas-shielded and a self-shielded stainless flux-cored wire, and choosing between them comes down to where you weld.
| E308LT-1 (gas-shielded) | E308LT0-3 (self-shielded) | |
| Shielding gas | Required (CO₂ or Ar/CO₂) | None — gasless |
| Best environment | Indoor shop welding | Outdoor / breezy job sites |
| Bead appearance | Smoother, less spatter | Convenient, no gas bottle |
If you weld stainless inside a shop, the gas-shielded E308LT-1 wire generally gives the cleanest results. If your work is outdoors where wind would blow shielding gas away, the gasless E308LT0-3 is the practical pick.
Buying: spool sizes and bulk
HYW's E308LT-1 is available in .035", .045", and 1/16" diameters on 10 lb and 25 lb spools. For occasional repair work a 10 lb spool keeps the wire fresh; for production shops the 25 lb spool lowers your cost per pound and means fewer changeovers. Buying multiple spools or mixed sizes? Contact HYW for bulk and distributor pricing.
Ready to order?
Shop E308LT-1 (308L) All-Position Flux-Cored Wire, or browse the full 308L Stainless Flux-Cored Wire and complete Stainless Flux-Cored Wire collections at HYW Products.
Frequently asked questions
What gas do I use with E308LT-1?
A gas-shielded stainless flux-cored wire runs on either 100% CO₂ or a 75–80% Argon / balance CO₂ blend. Check your spool's data sheet, because the gas choice influences weld chemistry.
Can E308LT-1 weld 304 stainless?
Yes. The 308L deposit is the standard filler for welding 304 and 304L base metals, and the low-carbon chemistry helps resist intergranular corrosion.
What polarity does it need?
DCEP — direct current, electrode positive — the standard setting for gas-shielded flux-cored stainless wire.
Is E308LT-1 all-position?
Yes. The rutile "-1" flux is formulated for flat, horizontal, vertical, and overhead welding with a fast-freezing slag.
What wire size should I start with?
.035" is the most versatile for thin to medium stainless and all-position work; step up to .045" or 1/16" as plate thickness and deposition needs increase.
Safety: Always weld in a well-ventilated area, use proper PPE, and follow your equipment manufacturer's and the wire data sheet's recommended settings. Stainless welding fumes contain chromium and nickel — use adequate fume extraction. Verify all parameters against a qualified welding procedure before production work.