AK-ER70S-3 CO2 Shielded Welding Wire for Low-Carbon and Low-Alloy Steel.
A copper-plated solid wire with H10MnSiA core for CO2 or Ar-CO2 shielded metal arc welding, suitable for all-position welding with short-circuit transfer and good process stability.
Product Overview
AK-ER70S-3 is a solid welding wire designed for gas shielded arc welding using CO2 or Ar-CO2 mixtures. It has a H10MnSiA core and a copper-plated surface to improve conductivity and reduce spatter during welding.
The wire is suitable for welding low-carbon steel and low-alloy steel structures. It supports all-position welding when using small diameter wire with short-circuit transfer, offering good arc stability and weld bead appearance.
When using CO2 as shielding gas, excessive heat input may reduce weld metal strength below specified levels. This should be considered during process setup.
Application: Suitable for welding low-carbon steel and low-alloy steel structures.
Key Benefits
Good Process Stability with Short-Circuit Transfer.
Small diameter AK-ER70S-3 wire enables stable short-circuit transfer in all positions, which reduces spatter and allows clean, controlled welds on thin and medium sections.
Copper-Plated Surface for Smooth Feeding.
The copper coating improves electrical conductivity and ensures consistent wire feeding through the contact tip, reducing the risk of feeding issues.
Complies with EN ISO 14341-A and GB/T 8110 Standards.
AK-ER70S-3 meets the EN ISO 14341-A: G 42 4 M 2 Si and GB/T 8110 ER50-3 classifications, ensuring compatibility with international welding specifications.
Suitable for CO2 and Ar-CO2 Shielding Gases.
The wire performs well with both pure CO2 and Ar-CO2 mixtures, offering flexibility in gas selection based on application and cost considerations.
Where It Is Used
- Welding of low-carbon steel structures.
- Joining of low-alloy steel components in fabrication and maintenance.
- All-position welding in structural steel and mechanical assemblies.
- Applications requiring good weld metal toughness and process stability.
Who It Is For
- Welding consumable distributors supplying solid wires for structural and mechanical fabrication.
- Steel fabricators working with low-carbon and low-alloy steels in various positions.
- Maintenance teams requiring reliable, consistent wire for routine welding tasks.
Problems It Solves
- Inconsistent weld quality due to poor wire feeding or high spatter in CO2 welding.
- Mismatch between wire chemistry and base metal requirements when using non-standard or unclassified filler metals.
- Difficulty in achieving all-position welds with solid wires that lack stable short-circuit transfer.
Specifications
Published by the factory for AK-ER70S-3. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 14341-A: G 42 4 M 2 Si AWS A5.18 ER70S-3 |
| Classification 2 | GB/T 8110 ER50-3 |
| Element | Content |
|---|---|
| C | 0.06-0.15 |
| Si | 0.45-0.75 |
| Mn | 0.9-1.4 |
| S | ≤0.025 |
| P | ≤0.025 |
| Ni | ≤0.15 |
| Cr | ≤0.15 |
| Mo | ≤0.15 |
| Cu | ≤0.50 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | ≥500 |
| Yield Stress (MPa) | ≥420 |
| Elongation (%) | ≥22J |
| Impact values (J) | ≥27J/-20℃ |
Technical Features
- H10MnSiA core with copper-plated surface for improved conductivity and feeding.
- Chemical composition: C 0.06-0.15%, Si 0.45-0.75%, Mn 0.9-1.4%, S ≤0.025%, P ≤0.025%, Ni ≤0.15%, Cr ≤0.15%, Mo ≤0.15%, Cu ≤0.50%
- Deposited metal tensile strength ≥500 MPa, yield stress ≥420 MPa, elongation ≥22%
- Impact toughness ≥27 J at minus 20 degrees C.
- Supplied in diameters compatible with short-circuit transfer for all-position welding.
Use Guide
- Select wire diameter based on joint thickness and position.
- Use CO2 or Ar-CO2 shielding gas as specified; avoid excessive heat input when using CO2 to prevent reduced weld strength.
- Ensure the wire is stored in a dry, sealed container and kept away from moisture and contaminants before use.
- Clean joint surfaces of oil, rust, paint, and moisture before welding to ensure sound weld metal and minimize porosity.
How It Compares
AK-ER70S-3 and ER70S-6 both belong to the ER70S series and are used for low-carbon and low-alloy steel welding. ER70S-3 has a higher silicon content and is designed for CO2 welding with good process stability. ER70S-6 has a higher manganese and silicon content and is typically used with Ar-CO2 mixtures for improved toughness and reduced spatter. ER70S-3 is better suited for all-position welding with short-circuit transfer, while ER70S-6 is more common in flat and horizontal positions with spray transfer.
Related Grades
Other welding wire in the same family.
AK-ER70S-3 Questions
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Can I use this wire with pure CO2 gas?
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Can we test AK-ER70S-3 before placing a production order?
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