AK-ER70S-6 MAG/CO₂ Wire for All-Position Structural Welding.
A general-purpose solid wire for all-position welding with stable arc and reduced spatter at low current, suitable for single-pass and multilayer joints in shipbuilding, bridges, and structural steel.
Product Overview
AK-ER70S-6 is a solid welding wire for gas metal arc welding (GMAW) and CO₂ welding, designed for all-position welding of low carbon and low alloy steel structures. It is not copper plated, which maintains clean weld surfaces and reduces contamination risks during welding.
The wire delivers a stable arc across a wide current range, with minimal spatter and sparks even at low current settings. This makes it suitable for both thin and thick sections, especially in applications requiring consistent weld quality without excessive heat input.
Application: Commonly used in welding of structures, such as single-pass or multilayer welding of shipbuilding, vehicles, bridges, buildings, pipe fittings, etc.
Key Benefits
Stable Arc at Low Current.
The wire maintains a consistent arc at low welding currents, reducing the risk of arc instability and ensuring smooth metal transfer during short welds and thin-section welding.
Reduced Spatter and Sparks.
Low spatter and minimal sparks improve weld appearance and reduce post-weld cleaning, especially in tight or hard-to-reach areas.
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
The deposited metal achieves tensile strength of at least 500 MPa, yield stress of at least 420 MPa, elongation of at least 22 percent, and impact energy of at least 27 J at minus 30 degrees C.
Where It Is Used
- Shipbuilding and offshore structures.
- Bridge and building steel frameworks.
- Vehicle and trailer frame fabrication.
- Pipeline fittings and structural components.
- Single-pass and multilayer welding in structural steel.
Who It Is For
- Welding consumable distributors supplying general-purpose solid wires.
- Structural steel fabricators working on buildings, bridges, and transport equipment.
- Shipyards and offshore contractors requiring reliable, low-spatter wires for all-position welding.
Problems It Solves
- Arc instability and excessive spatter at low current settings when using less stable solid wires.
- Need for multiple wire types to cover different welding positions on the same project.
- Inconsistent mechanical properties in the weld metal due to poor chemical control or improper wire formulation.
Specifications
Published by the factory for AK-ER70S-6 (Not copper plated). Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 636-A: W 42 3 C1/M21 3Si AWS A5.18 ER70S-6 |
| Classification 2 | GB/T 8110 ER50-6 |
| 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 |
| Cr | ≤0.15 |
| Mo | ≤0.15 |
| Cu | ≤0.016 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | ≥500 Yield Stress（Mpa）:≥420 Elongation （%）:≥22% Impact Values （J）:27J/-30℃ |
Technical Features
- Solid wire, not copper plated, for clean weld surfaces and reduced contamination.
- 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%, Cr ≤0.15%, Mo ≤0.15%, Cu ≤0.016%
- Deposited metal tensile strength ≥500 MPa, yield stress ≥420 MPa, elongation ≥22%, impact energy ≥27 J at minus 30 degrees C.
- Complies with EN ISO 636-A: W 42 3 C1/M21 3Si and AWS A5.18 ER70S-6 standards.
- Meets GB/T 8110 ER50-6 classification.
Use Guide
- Select wire diameter based on joint thickness and welding position; use lower current for thin sections to avoid burn-through.
- Ensure the wire is free from oil, rust, and moisture before welding to prevent porosity and cracking.
- Use clean shielding gas (CO₂ or mixtures) with proper flow rate to maintain arc stability and weld quality.
- Store wire in sealed packaging and avoid exposure to humid environments to prevent moisture absorption.
How It Compares
AK-ER70S-6 and ER70S-2 both serve as general-purpose solid wires for structural welding, but ER70S-6 has a higher silicon content and tighter control on impurities, which improves weld metal toughness and reduces spatter. ER70S-2 is more common in lower-cost applications, while ER70S-6 is preferred where impact resistance and clean welds are critical. Copper-plated wires offer better conductivity and feeding stability, but AK-ER70S-6’s non-copper-plated version avoids contamination in high-purity applications.
Related Grades
Other welding wire in the same family.
AK-ER70S-6 (Not copper plated) Questions
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