TOKO AWS A5.18 ER70S-6 (SG2) Carbon Steel MIG Wire
The most versatile solid MIG wire for mild steel fabrication. Higher silicon and manganese content provides superior deoxidation, allowing quality welds on surfaces with light rust, mill scale, or oils. Trusted by automotive manufacturers and structural fabricators worldwide.
Key Advantages
- AWS A5.18 ER70S-6 / SG2 compliant — full traceability with certified chemistry and mechanicals.
- Enhanced deoxidizers (Mn 1.40–1.85%, Si 0.80–1.15%) — handles light rust, mill scale, and surface contaminants better than ER70S-3.
- Excellent arc stability — smooth, consistent arc with minimal spatter across a wide range of parameters.
- All-position capability — flat, horizontal, vertical-up, and overhead with proper technique.
- High deposition rates — ideal for both thin sheet and thick plate applications.
- Available diameters: 0.8mm (0.030"), 1.0mm (0.035"), 1.2mm (0.045"), 1.6mm (1/16") in spools or drums.
Performance Benefits for General Fabrication
- Forgiving on Contamination: Higher Mn/Si content neutralizes light rust and oil, reducing porosity.
- Wetting Action: Excellent fluidity produces smooth, flat beads with good fusion.
- Spatter Control: Optimized chemistry minimizes post-weld cleaning.
- Mechanicals: High tensile (≥480 MPa) and good elongation (22-30%) for structural integrity.
- Versatility: Works with C25 (75/25 Ar/CO₂) or 100% CO₂ shielding gas.
Shielding Gas Recommendations
Choose based on your priorities: weld appearance vs. cost
🔹 75% Ar / 25% CO₂ (C25)
- Arc: Smooth, stable with minimal spatter
- Appearance: Clean, fine ripple finish
- Penetration: Good, with wider bead profile
- Best for: Thin materials, appearance-critical work, automotive
🔸 100% CO₂
- Arc: Slightly harsher, more spatter
- Appearance: Rougher bead, requires more cleaning
- Penetration: Deeper, narrower profile
- Best for: Thick plates, cost-sensitive production, outdoor welding
ER70S-6 performs excellently with both gas types. For critical applications, C25 is recommended for best results.
Primary Industrial Applications
ER70S-6 is the most widely used MIG wire globally — from automotive assembly lines to structural workshops.
Automotive Manufacturing
Body panels, chassis components, repair — excellent on light rust and oils common in automotive repair.
Structural Steel
Beams, columns, trusses — high deposition rates and all-position capability for field and shop fabrication.
Shipbuilding
Hull sections, decks, bulkheads — forgiving on mill scale and provides X-ray quality welds.
General Manufacturing
Frames, enclosures, machinery — versatile performance across a wide range of material thicknesses.
Additional Applications & Industries
- Pipe and tube mills
- Railcar manufacturing
- Agricultural equipment
- Metal furniture
- Maintenance and repair (MRO)
- HVAC ductwork
- Trailer and truck body fabrication
Technical Specifications (Typical)
Chemical Composition (%, single values are max)
| C | Mn | Si | P | S | Cu |
|---|---|---|---|---|---|
| 0.06–0.15 | 1.40–1.85 | 0.80–1.15 | ≤0.025 | ≤0.025 | ≤0.50 |
Mechanical Properties (as-welded, 75% Ar / 25% CO₂)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥480 (typical 520–570) |
| Yield Strength (MPa) | ≥400 (typical 420–460) |
| Elongation (%) | 22–30 |
| Charpy V-notch @ -30°C (J) | ≥27 (typical 40–60) |
Recommended Welding Parameters (1.2mm diameter, C25 gas)
| Position | Current (A) | Voltage (V) | Wire Feed Speed (m/min) |
|---|---|---|---|
| Flat/Horizontal | 180–280 | 24–28 | 6–10 |
| Vertical Up | 120–160 | 20–23 | 4–6 |
| Overhead | 140–180 | 22–25 | 5–7 |
Comparison: ER70S-6 vs ER70S-3
| Property | ER70S-6 (SG2) | ER70S-3 |
|---|---|---|
| Manganese (Mn) % | 1.40–1.85 | 0.90–1.40 |
| Silicon (Si) % | 0.80–1.15 | 0.45–0.75 |
| Deoxidation Capability | Excellent — handles rust/mill scale | Good — clean steel only |
| Typical Applications | Automotive, structural, contaminated surfaces | Clean plate, general fab |
ER70S-6 is the preferred choice for most applications due to its tolerance to surface conditions and better arc performance.
Storage & Handling
- Wire: Store in original packaging in dry conditions. Reseal plastic bags after use to prevent moisture absorption.
- Feedability: Use clean liners and contact tips designed for the wire diameter.
- For critical applications, use within 3 days of opening or store in heated cabinet.
Certifications & Technical Docs
Download batch-specific material certificates, welding procedure guidelines, and safety data for TOKO ER70S-6.
All certifications comply with AWS A5.18 / ASME SFA-5.18 and are third-party verified. Test reports include full chemical analysis and mechanical properties.
Why Choose TOKO ER70S-6?
- Proven Reliability: Trusted by automotive OEMs and structural fabricators worldwide.
- Consistent Quality: Stringent manufacturing controls ensure uniform cast, helix, and feedability.
- Global Compliance: Meets AWS, ASME, and ISO standards for international projects.