The Lincoln Electric SuperArc LA-90 is a premium quality, copper-coated solid wire classified under AWS A5.28 as ER80S-D2. Designed for the Gas Metal Arc Welding (GMAW) process, this wire is engineered to join high-strength low-alloy (HSLA) steels. The chemical composition includes approximately 0.50% Molybdenum and elevated levels of Manganese, which work together to provide excellent tensile strength in the range of 80,000 to 90,000 psi (550-620 MPa). This alloy composition also ensures the weld deposit retains its mechanical properties even after post-weld heat treatment (stress relief).<\/p>\n
A defining technical feature of the SuperArc line is the MicroGuard Ultra surface treatment. This proprietary coating minimizes friction within the welding gun liner and contact tip, ensuring consistent wire feeding even over long conduit runs. The wire diameter is 0.045 inches, suitable for all-position welding depending on the transfer mode utilized. It supports short-circuiting, globular, axial spray, and pulsed spray transfer, offering versatility across various industrial setups. The 33lb spool size is standard for industrial wire feeders, providing a balance between run-time and handling weight.<\/p>\n
This wire is particularly effective for applications requiring impact toughness at lower temperatures and resistance to cracking. It is compatible with Argon\/CO2 blends and Argon\/Oxygen shielding gas mixtures, allowing operators to fine-tune the arc characteristics and penetration profile based on the specific joint configuration.<\/p>\n","protected":false},"excerpt":{"rendered":"Lincoln Electric\u00ae SuperArc\u00ae LA-90 is capable of producing weld deposits with 550 – 620 MPa (80 – 90 ksi) tensile strength.\n\nContains 0.50% molybdenum for strength after stress-relief.\n\nMicroguard\u00ae Ultra provides superior feeding and arc stability.\n\nSupports short-circuiting, globular, axial spray and pulsed spray transfer.","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[1967,1959],"product_tag":[],"class_list":["post-1752563","product","type-product","status-publish","product_cat-specialty-electrodes-wires","product_cat-welding-wires-and-electrodes","pa_brand-lincoln","pa_diameter-0-045-2","pa_diameter-0-045","pa_grade-hardfacing","pa_grade-steel","pa_packaging-25-33lb-spool","pa_packaging-33lb-spool-2","pa_packaging-description-33-lb-per-spool","pa_polarity-dc-2","pa_polarity-na","pa_position-n-a","pa_spool-size-33lb","pa_weld-process-mig","pa_wire-type-solid","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"\n