AK-ER70S-4 CO2 and Mixed Gas Welding Wire for Carbon Steel.
A solid wire with H11MnSiA core and copper coating designed for CO2 or Ar+CO2 shielded metal arc welding, offering stable performance and improved strength with mixed gas shielding.
Product Overview
AK-ER70S-4 is a solid welding wire for gas shielded arc welding, formulated with an H11MnSiA core and featuring a copper-plated surface for consistent feeding and reduced spatter.
It is suitable for use with CO2 gas or mixed shielding gas containing 5% to 20% argon, delivering good process stability and weld quality across a range of applications.
The wire supports vertical down welding at low current settings and provides enhanced weld strength when shielded with argon-carbon dioxide mixtures.
Application: Suitable for welding carbon steel, and may also be used for highspeed welding of thin plates and pipes.
Key Benefits
Stable Welding Performance with CO2 or Mixed Gas.
AK-ER70S-4 performs reliably with pure CO2 or Ar+CO2 mixtures (5%-20%), offering consistent arc stability and minimal spatter across various welding positions.
Improved Strength with Mixed Gas Shielding.
When used with argon-carbon dioxide mix, the deposited weld metal achieves higher strength compared to pure CO2 shielding, supporting stronger joints in structural applications.
Capable of Vertical Down Welding at Low Current.
The wire maintains arc stability at low current levels, enabling vertical down welding without excessive spatter or poor bead formation.
Copper-Plated Surface for Smooth Feeding.
The copper coating reduces friction during feeding, minimizing wire feeding issues and ensuring consistent performance in semi-automatic and automatic welding equipment.
Where It Is Used
- Welding of carbon steel structures and components.
- High-speed welding of thin plates and pipes.
- Vertical down welding in structural and fabrication work.
- General fabrication and maintenance welding where consistent performance is required.
Who It Is For
- Welding consumable distributors supplying solid wires for industrial applications.
- Steel fabricators working with carbon steel in thin and medium sections.
- Maintenance teams requiring reliable, consistent wire for high-speed or vertical welding.
Problems It Solves
- Inconsistent weld quality when switching between CO2 and mixed gas shielding due to mismatched wire chemistry.
- Poor feeding or increased spatter from non-copper-plated wires in automated systems.
- Lack of vertical down welding capability at low current with standard ER70S-4 wires.
Specifications
Published by the factory for AK-ER70S-4. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 14341-B: G 49 A Z C G4 |
| Classification 2 | AWS A5.18 ER70S-4 |
| Classification 3 | GB/T 8110 ER50-4 |
| Element | Content |
|---|---|
| C | 0.06-0.15 |
| Si | 0.65-0.85 |
| Mn | 1.0-1.5 |
| 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) | 91J/-30℃ |
Technical Features
- H11MnSiA core wire with copper-plated surface for smooth feeding.
- Complies with EN ISO 14341-B: G 49 A Z C G4, AWS A5.18 ER70S-4, and GB/T 8110 ER50-4 standards.
- Chemical composition: C 0.06-0.15%, Si 0.65-0.85%, Mn 1.0-1.5%, 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 91 J at minus 30 degrees C.
Use Guide
- Select shielding gas based on application: pure CO2 for cost-effective welding or Ar+CO2 (5%-20%) for improved weld quality and strength.
- Use low current settings for vertical down welding to maintain arc stability and avoid excessive penetration.
- Ensure the wire is stored in dry conditions to prevent moisture absorption and maintain performance.
- Clean the joint surfaces from oil, rust, and paint before welding to avoid porosity and ensure sound welds.
How It Compares
AK-ER70S-4 and ER70S-6 both weld carbon steel with CO2 or mixed gas, but ER70S-6 has higher manganese and silicon levels for improved toughness and reduced spatter. AK-ER70S-4 is optimized for vertical down welding at low current and offers better strength with mixed gas shielding. ER70S-2 is designed for lower strength applications and has a different alloying profile. The choice depends on joint requirements and shielding gas availability.
Related Grades
Other welding wire in the same family.
AK-ER70S-4 Questions
What shielding gases can be used with AK-ER70S-4?
What standards does this wire meet?
What are the mechanical properties of the deposited metal?
Can this wire be used for vertical down welding?
What packing is AK-ER70S-4 supplied in?
Can we test AK-ER70S-4 before placing a production order?
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