60082409 - Bonarc E308L-16 Stainless Steel Stick Electrode 2.4mm 4.5kg Pack

Technical Overview of Bonarc E308L Stainless Steel Electrodes

The Bonarc E308L is a high-efficiency stainless steel electrode designed for the Shielded Metal Arc Welding (SMAW) process. Engineered with a rutile-based coating, this electrode conforms to AWS A5.4 E308L-16 specifications. The 'L' designation indicates a low carbon content (maximum 0.04%), which is critical for minimizing carbide precipitation during the welding thermal cycle. This feature significantly enhances the weld metal's resistance to intergranular corrosion, making it superior to standard E308 electrodes in aggressive environments.

Metallurgically, the electrode deposits a 19% Chromium / 9% Nickel austenitic stainless steel matrix. The controlled ferrite number (FN) in the deposit ensures excellent resistance to hot cracking while maintaining ductility. The 2.4mm diameter is optimized for sheet metal and general fabrication where heat input control is paramount. The electrode is formulated to operate on both AC and DC+ (Reverse Polarity) currents, providing flexibility across various power sources.

Operational characteristics include a high deposition rate and a smooth, stable arc transfer. The slag system is designed to be self-peeling, leaving a clean, finely rippled bead profile that requires minimal post-weld grinding or cleaning. This electrode is specifically recommended for welding 18-8 stainless steels, including AISI 304, 304L, 308, and 308L grades. It is widely utilized in industries requiring sanitary welding standards, such as food and beverage processing, as well as in chemical storage tank fabrication and architectural stainless steel structures.

Storage and handling protocols should follow standard low-hydrogen practices for stainless consumables. While the coating is moisture-resistant, maintaining the electrodes in a dry environment ensures optimal arc performance and prevents porosity defects associated with hydrogen pickup.