AK-ER70S-3(Not Copper Plated) GMAW Wire for Smooth Weld Bead on Thin Plate.
A low-spatter, high-fluidity solid wire for short-circuit transfer welding with mixed gas shielding, delivering clean, smooth beads on thin sections without cracking.
Product Overview
AK-ER70S-3(Not Copper Plated) is a solid welding wire for gas metal arc welding (GMAW) using mixed gas shielding. It is designed for low-current short-circuit transfer welding, where high fluidity of the molten pool and excellent crack resistance are required.
The wire produces minimal spatter and a thin, easily removable slag layer, making it ideal for applications demanding a smooth and delicate weld bead, especially on thin plate materials.
It meets the EN ISO 636-A: W 42 5 2Si and AWS A5.18 ER70S-3 classifications, and is suitable for both single-pass and multi-layer welding across a wide range of current settings.
Application: Suitable for single-pass or multi-layer welding, it is a widely used GMAW wire. The use of a wide range of current, high and low current welding can get beautiful weld bead.
Key Benefits
High Molten Pool Fluidity.
The wire’s formulation ensures excellent flow in the molten pool during short-circuit transfer, which results in a smooth, uniform bead profile even at low current levels.
Low Spatter and Easy Slag Removal.
Minimal spatter and a thin slag layer reduce post-weld cleaning time and improve weld appearance, especially in tight or hard-to-reach areas.
Crack Resistance in Thin Plate Welding.
The chemical composition provides strong resistance to cracking, which is critical when welding thin sections where heat input is limited and distortion risk is high.
Versatility Across Current Ranges.
Delivers consistent performance and beautiful bead appearance at both high and low current settings, supporting flexible process selection for different joint types.
Where It Is Used
- Thin plate fabrication requiring smooth, cosmetic weld beads.
- Single-pass and multi-layer GMAW welding in structural and mechanical applications.
- Welding of low carbon steel components where minimal spatter and clean finish are required.
- General-purpose GMAW welding in fabrication shops and maintenance environments.
Who It Is For
- Welding consumable distributors offering solid wires for GMAW applications.
- Fabricators working with thin gauge steel where bead appearance and spatter control are priorities.
- Maintenance teams needing a reliable wire for consistent results across variable current settings.
Problems It Solves
- Cracking in thin plate welds due to poor molten pool control and high residual stress.
- Excessive spatter and difficult slag removal that increase post-weld cleaning time.
- Inconsistent bead quality when switching between high and low current welding parameters.
Specifications
Published by the factory for AK-ER70S-3(Not copper plated). Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO 636-A: W 42 5 2Si AWS A5.18 ER70S-3 |
| Element | Content |
|---|---|
| C | ≤0.06-0.15 |
| Si | ≤0.45-0.75 |
| Mn | ≤0.90-1.40 |
| S | ≤0.025 |
| P | ≤0.025 |
| Ni | ≤0.15 |
| Cr | ≤0.15 |
| Mo | ≤0.15 |
| Cu | ≤0.50 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | ≥525 |
| Yield Stress (MPa) | ≥400 |
| Elongation (%) | ≥22J |
| Impact values (J) | ≥27J/-20℃ |
Technical Features
- Formulated for short-circuit transfer GMAW with mixed gas shielding.
- Chemical composition: C ≤0.06-0.15, Si ≤0.45-0.75, Mn ≤0.90-1.40, S ≤0.025, P ≤0.025, Ni ≤0.15, Cr ≤0.15, Mo ≤0.15, Cu ≤0.50.
- Deposited metal tensile strength ≥525 MPa, yield stress ≥400 MPa, elongation ≥22%
- Impact toughness ≥27 J at minus 20 degrees C.
- Supplied in diameters compatible with standard GMAW equipment, with no copper plating.
Use Guide
- Select wire diameter based on material thickness and joint configuration, ensuring compatibility with the welding machine and gas mixture.
- Use mixed gas shielding (e.g., CO2 + Ar) to achieve optimal arc stability, spatter reduction, and bead appearance.
- Set welding current within the recommended range for the selected diameter to maintain short-circuit transfer and avoid excessive spatter or burn-through.
- Clean joint surfaces from oil, rust, paint, and moisture before welding to ensure sound weld metal and prevent porosity.
How It Compares
AK-ER70S-3(Not Copper Plated) and AK-ER70S-6(Not Copper Plated) are both solid wires for GMAW with similar classifications, but differ in chemical composition and intended use. AK-ER70S-3 is optimized for low-current short-circuit transfer with superior fluidity and crack resistance, making it better suited for thin plate and cosmetic welds. AK-ER70S-6 is designed for higher current applications and may offer different mechanical properties. For applications requiring a clean, smooth bead on thin sections, AK-ER70S-3 is the preferred choice.
Related Grades
Other welding wire in the same family.
AK-ER70S-3(Not copper plated) Questions
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