The Techniweld ER308L Stainless Steel MIG Wire is a premium consumable designed for the Gas Metal Arc Welding (GMAW) of austenitic stainless steels. This specific alloy is formulated with a nominal composition of 20% chromium and 10% nickel, adhering strictly to AWS A5.9 specifications. The ‘L’ designation indicates a controlled low carbon content (maximum 0.03%), which is critical for minimizing the risk of carbide precipitation at the grain boundaries. This feature significantly enhances the weld’s resistance to intergranular corrosion without the need for post-weld heat treatment, making it the standard choice for welding 304 and 304L base metals.<\/p>\n
This 0.045-inch (1.2mm) diameter wire is engineered for heavier fabrication tasks where higher deposition rates are required. The wire surface is precision-cleaned and treated to ensure optimal electrical conductivity and smooth feeding through standard MIG gun liners. It exhibits excellent mechanical properties, typically delivering a tensile strength of approximately 87,000 PSI and elongation of 35%. The balanced chemistry, often including a slight silicon enhancement, promotes excellent wetting action, resulting in a flat bead profile and smooth tie-ins, which reduces grinding labor.<\/p>\n
Operational parameters for this wire typically require Direct Current Electrode Positive (DCEP). Shielding gas selection is crucial for performance; a tri-mix of Helium (90%), Argon (7.5%), and CO2 (2.5%) is often preferred for short-circuit transfer to produce flat welds with minimal spatter. Alternatively, a 98% Argon \/ 2% Oxygen mix can be used for spray transfer modes in flat and horizontal positions. This 10lb spool is packaged to prevent moisture contamination, ensuring porosity-free welds right out of the box.<\/p>\n