ER70S-6 is a widely used carbon steel gas-protected solid welding wire, known for its excellent welding process performance and anti-contamination capabilities. It belongs to the AWS A5.18 standard, which is equivalent to ER50-6 in GB/T 8110.
Core features:
* High deoxidizer content and strong fouling resistance: It contains higher silicon (Si: 0.80-1.15%) and manganese (Mn: 1.40-1.85%) than ordinary welding wires. This makes it insensitive to scale, rust and oil stains on the base metal, effectively reducing porosity.
* Excellent welding processability: easy arc leading, stable arc combustion, very small spatter, beautiful weld forming, and smooth wire feeding, suitable for high-speed welding.
* Good mechanical properties: The tensile strength of the deposited metal can usually reach more than 500MPa, and it has excellent low-temperature impact toughness, which can ensure the safe operation of the welded structure in a low-temperature environment.
* Full-position welding: suitable for all positions such as flat welding, horizontal welding, vertical welding and back welding.
Main application scenarios
* Transportation: It is widely used in automobile manufacturing (such as car frames, parts), ship construction (hull structure) and container welding.
* Construction machinery: It is very suitable for welding structural parts of heavy machinery and construction machinery.
* Infrastructure and steel structure: It is a common welding material in the fields of bridges, building steel structures, pipelines (including small-diameter pipes and root welds) and pressure vessels.
* Automated Welding: Due to its stable wire feed and consistent welding performance, it is particularly suitable for efficient production scenarios such as robotic welding and semi-automatic welding.
Key technical data
* Chemical Composition (AWS Standard): Carbon (C): 0.06-0.15%, Manganese (Mn): 1.40-1.85%, Silicon (Si): 0.80-1.15%.
* Mechanical properties (typical): yield strength > 400 MPa, tensile strength > 490 MPa, elongation > 22%.
* Shielding gas: Pure CO₂ or Ar + CO₂ mixtures (e.g. 80% Ar + 20% CO₂) are usually used.
* Diameter specifications: Commonly used diameters are 0.8mm, 1.0mm, 1.2mm, 1.6mm, etc.
Tips for use
* Gas flow rate: The generally recommended gas flow rate is 15-25 L/min.
* Dry extension length: It is better to keep the dry extension length of the welding wire at about 15-20mm.
* Current polarity: Typically reverse DC (DC+).
Is it convenient to disclose what specific workpiece you are welding? For example, the thickness of the sheet or the form of the joint, I can help you confirm a more suitable diameter specification.
Post time: Feb-26-2026