308 vs 309 Welding Rod – What’s the Real Difference?
Last Updated: January 2026 Spend enough time in a welding shop and you’ll hear plenty of mixed advice about stainless filler rods. 308 and 309 welding rods look almost identical, run on the same machines, and often sit side by side on the rack. That similarity makes a lot of welders treat them as interchangeable…