87314 - Bohler Eco-Spark 420 ER70S-6 .045 Copper-Free MIG Wire 20kg

High-Performance Copper-Free MIG Wire for Industrial Fabrication

The Bohler Eco-Spark 420 is a premium, non-copper coated solid wire designed for the most demanding MIG/MAG welding applications. Classified as ER70S-6, this wire is engineered to deliver superior feedability and arc stability, making it an exceptional choice for both manual and fully automated robotic welding systems. By eliminating the traditional copper coating, Bohler has removed the risk of copper flaking, which is a common cause of clogged liners, jammed contact tips, and unscheduled downtime in high-volume production environments.

This 20kg spool offers extended run times compared to standard packaging, further enhancing productivity. The wire features a special surface treatment that ensures excellent corrosion resistance and smooth feeding over long distances. The Eco-Spark 420 is characterized by its high current carrying capacity and extremely low spatter generation, resulting in clean, high-quality welds with minimal post-weld cleanup required. It is particularly effective for welding unalloyed and low-alloyed steels, structural steels, and fine-grained steels.

Key Industrial Benefits:

• Reduced Maintenance: No copper dust accumulation in the torch liner or wire feeder.


• Stable Arc: Consistent ignition and arc stability even at high parameters.


• Health & Safety: Reduced welding fumes compared to copper-coated alternatives.


• Versatility: Suitable for use with both CO2 and mixed shielding gases.

For fabrication shops looking to optimize efficiency and weld quality, the Bohler Eco-Spark 420 provides a reliable, high-tech solution that outperforms traditional copper-coated wires in continuous operations.