TOKO AWS A5.18 ER70S-6 (SG2) Solid Welding Wire

1. AWS A5.18 Classification

• ER70S-6:
• ER: Electrode/Rod (usable as both electrode and filler).
• 70: Minimum tensile strength of 70,000 psi (70 ksi or ~483 MPa).
• S: Solid wire.
• 6: Chemical composition variant with higher silicon (Si) and manganese (Mn) for enhanced deoxidization, making it suitable for welding slightly contaminated or oxidized surfaces.

2. Chemical Composition

• Carbon (C): 0.06–0.15%
• Manganese (Mn): 1.40–1.85%
• Silicon (Si): 0.80–1.15%
• Sulfur (S) & Phosphorus (P): ≤0.03%
• Higher Si/Mn improves fluidity, reduces porosity, and enhances arc stability.

3. Shielding Gas (SG2 Designation)

• SG2: Likely refers to compatibility with specific shielding gases. Common gases include:
• 75% Argon + 25% CO₂ (C25): Most popular for smooth arcs, minimal spatter, and clean welds.
• 100% CO₂: Cost-effective but may increase spatter.
• SG2 may indicate Toko's optimized performance with mixed gases or specific gas blends.

4. Applications

• Welding low-carbon steels (ASTM A36, SAE 1008-1020).
• Automotive repair, structural fabrication, shipbuilding, and general manufacturing.
• Suitable for all welding positions (flat, horizontal, vertical, overhead) with proper technique.

5. Mechanical Properties

• Tensile Strength: ≥70 ksi (483 MPa).
• Yield Strength: ≥58 ksi (400 MPa).
• Elongation: ~22–30% (good ductility).
• Produces strong, crack-resistant welds with minimal post-weld cleanup.

6. Handling & Storage

• Store in a dry, climate-controlled environment to prevent moisture absorption.
• Use wire feeders with smooth liners to avoid jamming (common diameters: 0.8mm, 1.0mm, 1.2mm).

7. Manufacturer-Specific Features (SG2)

• TOKO’s SG2 designation may indicate:
• Improved feedability and arc stability.
• Reduced spatter for cleaner welds.
• Optimized for high-deposition welding or specific industrial applications.

8. Key Advantages

✅ Excellent performance on mildly rusty or scaled steel.
✅ Smooth weld bead appearance with minimal porosity.
✅ Versatile for thin to medium-thickness materials.

Comparison to ER70S-3

ER70S-6 has higher Si/Mn than ER70S-3, making it better for contaminated surfaces but slightly less fluid for very clean steel.