The Lincoln Electric SuperArc LA-90 is a premium copper-coated, low alloy solid MIG wire classified to AWS A5.28/A5.28M ER90S-D2 / ER80S-D2, designed for GMAW welding of high-strength low-alloy steels, quenched and tempered steels, and chrome-moly applications requiring minimum 80,000–90,000 psi (552–620 MPa) tensile strength in the as-welded condition. SuperArc LA-90 is manufactured to Lincoln Electric’s highest quality standards for consistent feedability, stable arc characteristics, and reliable mechanical performance. WeldingMart is an authorized Lincoln Electric distributor with stock shipping from our Wisconsin facility.
Related products: MIG & Flux-Cored Welding Wire | MIG Welding Guns.
| Process | GMAW (MIG Welding) |
|---|---|
| AWS Classification | ER90S-D2 / ER80S-D2 |
| Electrode Type | Solid Wire MIG |
| Alloy Class | Low Alloy Steel |
| Available Diameter | .045″ |
| Package Sizes | 33 lb Metal Spool, 44 lb Metal Spool, 60 lb Wood Spool, 500 lb Accu-Trak Drum, 500 lb Accu-Pak Box, 1000 lb Accu-Trak Drum, 1000 lb Accu-Pak Box |
| Minimum Tensile Strength | 80,000–90,000 psi (552–620 MPa) |
| Polarity | DCEP (electrode positive) |
- High-strength structural welding: SuperArc LA-90 meets the tensile requirements of ASTM A514, A517, HY-80, and similar high-strength low-alloy steels used in cranes, pressure vessels, and heavy structural assemblies.
- Chrome-moly piping and pressure vessels: ER90S-D2 alloy chemistry (nominally 0.5% Mo) is suitable for creep-resistant applications on 1/2Mo and selected low-alloy steel grades per applicable WPS.
- Military and defense fabrication: HY-80 and HY-100 base metals used in naval vessel and armored vehicle fabrication are within the design envelope of ER90S-D2/ER80S-D2 filler metal.
- Heavy equipment and mining machinery: Provides the tensile strength margin needed for bucket, boom, and undercarriage components on excavators, loaders, and drilling equipment.
- Offshore and subsea structural welding: Consistent mechanical properties across heat lots support code-qualified procedures for offshore structures requiring high fracture toughness filler metals.
SuperArc LA-90 feeds through any Lincoln Electric MIG welder or GMAW wire feeder equipped with smooth drive rolls appropriate for solid wire at .045″ diameter. Compatible platforms include the Power MIG family, POWER WAVE advanced process welders, and LN-series standalone wire feeders. Use a copper-coated wire liner and contact tip sized for .045″ wire. The high-deposition bulk packaging (Accu-Trak Drum and Accu-Pak Box configurations) is designed for semi-automatic or robotic cell deployment with drum feeders or bulk pay-off systems.
SuperArc LA-90 is manufactured by Lincoln Electric under ISO 9001-certified quality management processes. The ER90S-D2 classification is per AWS A5.28/A5.28M. Copper coating is applied for enhanced electrical contact, feedability, and surface corrosion resistance in storage. Each production lot is manufactured to consistent chemistry and mechanical property standards. The product meets applicable ABS and other class society approvals for structural marine applications — confirm specific approvals with Lincoln Electric for the most current certification status.
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