AK-ER70S-G Solid Wire for All-Position MAG/CO₂ Welding of Thick Steel.
A general-purpose solid welding wire with stable arc and low spatter at low current, suitable for thick plate applications in construction and structural fabrication.
Product Overview
AK-ER70S-G is a solid welding wire designed for all-position MAG and CO₂ welding of low carbon and low alloy steels. It is formulated for stable arc performance across a wide range of welding currents, with reduced spatter and spatter at lower current levels.
The wire is suitable for welding thick plates in structural applications such as construction machinery, bridges, and steel structures. It meets the EN ISO 636-A: W 42 3 C1/M21 3Si, AWS A5.18 ER70S-G, and GB/T 8110 ER50-G classifications.
Chemical composition is controlled to ensure consistent mechanical properties and weld metal performance, with carbon content between 0.06% and 0.15%, silicon between 0.80% and 1.15%, and manganese between 1.40% and 1.85%.
Application: It is suitable for welding of thick plates such as construction machinery, bridges, and steel structures.
Key Benefits
Stable Arc Across Wide Current Range.
The wire maintains a consistent arc at both low and high current levels, enabling smooth welding on thick sections without arc instability or excessive spatter.
Low Spatter at Low Current.
Reduced spatter during low-current welding improves weld appearance and reduces post-weld cleaning time, especially in vertical and overhead positions.
All-Position Welding Capability
Suitable for flat, horizontal, vertical, and overhead welding positions, allowing one wire type to cover multiple joint orientations without changing consumables.
Consistent Mechanical Properties
Deposited metal achieves tensile strength of at least 490 MPa, yield stress of at least 420 MPa, elongation of at least 22%, and impact toughness of at least 27 J at minus 40 degrees C.
Where It Is Used
- Welding of thick plates in construction machinery.
- Bridge and steel structure fabrication.
- Structural steel joints requiring all-position welding.
- General-purpose MAG and CO₂ welding of low carbon and low alloy steels.
Who It Is For
- Welding consumable distributors stocking general-purpose solid wires.
- Fabricators of heavy steel structures and machinery.
- Contractors working on large-scale structural projects with thick-section welds.
Problems It Solves
- Arc instability and excessive spatter at low current when using general-purpose wires on thick sections.
- Need to carry multiple wire types to cover different welding positions on the same project.
- Inconsistent mechanical properties in deposited metal due to uncontrolled chemical composition.
Specifications
Published by the factory for AK-ER70S-G (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 3 C1/M21 3Si AWS A5.18 ER70S-G GB/T 8110 ER50-G |
| Element | Content |
|---|---|
| C | 0.06-0.15 |
| Si | 0.80-1.15 |
| Mn | 1.40-1.85 |
| S | ≤0.035 |
| P | ≤0.025 |
| Ni | ≤0.15 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | ≥490 |
| Yield Stress (MPa) | ≥420 |
| Elongation (%) | ≥22J |
| Impact values (J) | ≥27J/-40℃ |
Technical Features
- Solid wire, not copper plated, for clean weld surfaces and consistent feeding.
- Chemical composition: C 0.06-0.15%, Si 0.80-1.15%, Mn 1.40-1.85%, S ≤0.035%, P ≤0.025%, Ni ≤0.15%
- Deposited metal tensile strength ≥490 MPa, yield stress ≥420 MPa, elongation ≥22%
- Impact toughness ≥27 J at minus 40 degrees C.
- Meets EN ISO 636-A: W 42 3 C1/M21 3Si, AWS A5.18 ER70S-G, and GB/T 8110 ER50-G classifications.
Use Guide
- Select wire diameter based on joint thickness and welding position; use lower current for thin sections and higher current for thick plates.
- Ensure the wire is fed smoothly through the contact tip and that the shielding gas flow is within the recommended range for MAG or CO₂ welding.
- Clean the base metal surface from oil, rust, paint, and moisture before welding to avoid porosity and inclusions.
- Maintain proper arc length and travel speed to achieve consistent bead profile and minimize spatter.
How It Compares
AK-ER70S-G and ER70S-6 are both general-purpose solid wires for MAG/CO₂ welding, but ER70S-6 has a higher silicon content and is designed for higher deposition rates. AK-ER70S-G offers better arc stability at low current and lower spatter, making it more suitable for all-position welding on thick sections. Copper-plated wires offer better conductivity and feeding, but AK-ER70S-G is not copper plated, which may be preferred in applications where surface cleanliness is critical.
Related Grades
Other welding wire in the same family.
AK-ER70S-G (Not copper plated) Questions
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