Blue Demon ER70S‑6 Mild Steel MIG Welding Wire (ER70S‑6)

Solid wire quality directly affects weld integrity. Blue Demon ER70S‑6 Mild Steel MIG Welding Wire is a go‑to consumable for shop and field welders who need consistent feed, smooth arcs, and reliable deposition on mild steel projects.

Key Takeaways

• ER70S‑6 solid wire for general mild steel welding
• High silicon content for excellent puddle fluidity and wet‑out
• Compatible with 75/25 argon‑CO₂ or 100 % CO₂ shielding gas
• Suitable for single‑pass and multi‑pass welds
• Available in spool form for standard MIG machines
• Designed for professional fabrication and repair

Performance & Use

ER70S‑6 wire is known for its ability to handle slightly dirty or rusty steel due to its deoxidizer content. It produces a stable arc with minimal spatter and offers good bead appearance. Use it for fabrication, maintenance, and automotive work where mild steel is the base metal. It works equally well in short‑arc and spray transfer modes with proper shielding gas.

Durability & Build

The wire comes on a sturdy spool for consistent feeding through MIG machines. Proper storage in a dry environment prevents moisture pickup and oxidation. When used with the right drive rollers and liner, it delivers smooth feeding and predictable performance.

Power / Sizing / Specs

• AWS classification: ER70S‑6
• Diameter options: manufacturer does not specify (commonly .030 ″ – .045 ″)
• Shielding gas: 75/25 Ar/CO₂ or 100 % CO₂
• Tensile strength: manufacturer does not specify (typical ER70S‑6 ratings apply)

Who It’s For

• Fabricators and welders working with mild steel
• Automotive and body shop technicians
• Maintenance crews handling structural repairs
• Hobbyists needing a dependable solid wire for projects

Quick FAQ

• Is ER70S‑6 wire suitable for dirty steel?
  Yes — its deoxidizers improve performance on mill scale and light rust.
• What shielding gas should I use?
  Typically 75 % argon / 25 % CO₂ or pure CO₂, depending on the desired arc characteristics.
• Does this wire fit standard MIG machines?
  Yes — it is supplied on spools compatible with most MIG feeders (check your machine’s spool size).

Safety Notes

• Always wear appropriate PPE: welding helmet, gloves, flame‑resistant clothing, and eye protection.
• Ensure adequate ventilation to avoid fume buildup when welding.
• Confirm that the wire diameter matches your drive rolls and liner to prevent feeding issues.
• Store wire in a dry location to prevent moisture absorption and rust.

Where to Buy

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