63091600 - Bonarc ER309L Stainless Steel TIG Welding Rod - 1.6mm Diameter

High-Performance ER309L Austenitic Stainless Steel TIG Rods

The Bonarc ER309L TIG Welding Rod (1.6mm) is a premium-grade austenitic stainless steel filler metal designed for the most demanding industrial applications. Conforming to AWS A5.9 standards, this alloy is engineered with a high chromium and nickel content, providing exceptional resistance to oxidation and corrosion. The "L" designation indicates a low carbon composition (maximum 0.03%), which is critical for preventing intergranular carbide precipitation during the welding process. This feature ensures that the weld zone maintains its corrosion-resistant properties even after exposure to high temperatures, making it suitable for equipment that operates in harsh chemical environments.

One of the most significant technical advantages of ER309L is its ability to weld dissimilar metals. It is the industry-standard choice for joining mild steel or low-alloy steel to stainless steel grades like 304 or 316. The alloy composition is balanced to accommodate the dilution from the carbon steel base metal without forming brittle phases or cracking. Additionally, it serves as an excellent buffer layer when cladding carbon steel with stainless steel, providing a ductile transition zone before subsequent layers of 308L or 316L are applied.

The 1.6mm diameter offers precise control for the operator, making it particularly effective for welding thin-walled pipes, sheet metal fabrication, and root passes where heat input must be strictly managed to prevent distortion. Packaged in a durable 5kg tube, these rods are protected from moisture and contamination, ensuring consistent performance and arc stability. For industrial fabrication shops, petrochemical maintenance, and power generation facilities, the Bonarc ER309L provides the reliability and metallurgical integrity required for critical weldments.