The ER309L Stainless Steel TIG Rod (3.2mm \/ 1\/8″) is a premium austenitic stainless steel filler metal specifically engineered for the Gas Tungsten Arc Welding (GTAW) process. This alloy is characterized by its high chromium (approx. 23-25%) and nickel (approx. 12-14%) content, which provides superior corrosion resistance and oxidation resistance at elevated temperatures. The “L” designation signifies a controlled low carbon content (maximum 0.03%), which is critical for preventing carbide precipitation and intergranular corrosion, particularly in the heat-affected zone (HAZ) of the weldment.<\/p>\n
This specific grade is the industry standard for joining dissimilar metals, such as welding AISI 304 or 316 stainless steels to carbon steels or low-alloy steels. It is also extensively used for depositing buffer layers on carbon steel prior to cladding with 308 or 316 grades. The 3.2mm diameter is well-suited for welding thicker base materials, filling larger joint gaps, or for multi-pass applications where higher deposition rates are required compared to thinner rods. The metallurgical composition ensures a ferrite number sufficient to prevent hot cracking during solidification, a common issue in fully austenitic welds.<\/p>\n
Manufactured to strict AWS A5.9 specifications, these rods undergo rigorous surface cleaning processes to ensure they are free from oil, grease, and oxides, promoting a stable arc and minimizing porosity defects. The rods are stamped for easy identification and packaged in a durable 10lb tube to protect against environmental contamination during storage.<\/p>\n","protected":false},"excerpt":{"rendered":"Technical Overview of ER309L TIG Filler Metal The ER309L Stainless Steel TIG Rod (3.2mm \/ 1\/8″) is a premium austenitic stainless steel filler metal specifically engineered for the Gas Tungsten Arc Welding (GTAW) process. This alloy is characterized by its high chromium (approx. 23-25%) and nickel (approx. 12-14%) content, which provides superior corrosion resistance and… View Article<\/a>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[1964,1959],"product_tag":[],"class_list":{"0":"post-1752430","1":"product","2":"type-product","3":"status-publish","5":"endorsed-mechanical-contractor","6":"endorsed-red-seal","7":"endorsed-stainless-steel-fab-shop","8":"endorsed-tool-die-shop","9":"product_cat-all-stainless-mig-tig-electrodes","10":"product_cat-welding-wires-and-electrodes","11":"pa_aws-spec-er309l-er309l","12":"pa_aws-spec-er309l","13":"pa_brand-central-wire","14":"pa_brand-central-wire-central-wire","15":"pa_diameter-3-2mm","16":"pa_diameter-3-2mm-3-2mm","17":"pa_grade-425","18":"pa_grade-309-309","19":"pa_packaging-10lb-tube","20":"pa_packaging-10lb-tube-10lb-tube","21":"pa_packaging-description-10-lb-tube","22":"pa_polarity-dc","23":"pa_polarity-dc-dc","24":"pa_weld-process-tig-tig","25":"pa_weld-process-tig","27":"first","28":"instock","29":"taxable","30":"shipping-taxable","31":"purchasable","32":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product\/1752430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/media?parent=1752430"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_brand?post=1752430"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_cat?post=1752430"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_tag?post=1752430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}