MIG WIRE LINCOLN ULTRAMAG S4 MILD STEEL 0.9MM
Lincoln Ultramag S4 Mild Steel MIG Welding Wire – 0.9mm
Product Overview
Lincoln Ultramag S4 is a premium copper-coated, solid mild steel MIG welding wire engineered for smooth, consistent arc performance across a wide range of welding applications. The 0.9mm diameter makes this wire ideal for light-to-medium gauge steel fabrication, offering excellent feedability, low spatter levels, and clean, high-quality weld beads. Trusted by professional welders, fabricators, and workshops, Lincoln Ultramag S4 delivers reliable results on general mild steel welding projects, from automotive repair to structural fabrication.
Key Features
- Premium Copper Coating – Enhances electrical conductivity, improves current transfer, and protects against corrosion during storage
- Smooth, Consistent Wire Feed – Precision-drawn wire minimizes feed roll slippage and reduces downtime from wire jams or birdnesting
- Low Spatter Levels – Produces cleaner welds, reducing post-weld cleanup and grinding time
- Excellent Arc Stability – Delivers a stable, consistent arc for uniform bead appearance and penetration
- High Deposition Efficiency – Maximizes productivity with minimal wire wastage
- 0.9mm Diameter – Versatile size suited to a broad range of material thicknesses and amperage settings
Technical Specifications
| Specification | Detail |
|---|---|
| Brand | Lincoln Electric |
| Product Name | Ultramag S4 |
| Wire Type | Solid MIG Welding Wire |
| Material | Mild Steel |
| Diameter | 0.9mm |
| Coating | Copper-coated |
| Classification | AWS A5.18 ER70S-6 (typical for S4 grade) |
| Shielding Gas | CO2 or Argon/CO2 mixed gas (typically 75/25 or 80/20) |
Applications
Lincoln Ultramag S4 0.9mm wire is suitable for:
- General mild steel fabrication and repair
- Automotive body and chassis welding
- Sheet metal work
- Structural steel welding
- Workshop and maintenance welding
- Light industrial manufacturing
- DIY and hobbyist MIG welding projects
Why Choose Lincoln Ultramag S4?
Lincoln Electric is a globally recognized leader in welding consumables, known for consistent quality and manufacturing precision. The Ultramag S4 range is manufactured to tight tolerances, ensuring uniform wire diameter and surface finish — critical factors for reducing arc instability and wire feed issues. This makes it a dependable choice for both professional welders seeking repeatable weld quality and hobbyists looking for an easy-to-use, forgiving wire.
Compatibility
This 0.9mm mild steel MIG wire is compatible with most standard MIG/MAG welding machines and wire feed units. Ensure your drive rolls and contact tips are matched to the 0.9mm diameter for optimal feed performance.
Note: Always verify specific packaging size (e.g., 5kg, 15kg spool), exact AWS classification, and shielding gas recommendations against the official Lincoln Electric datasheet for this product, as specifications can vary by region and batch.