AK-ER55-D2 CO2 Shielded Welding Wire for High-Strength Low-Alloy Steel.
A copper-plated solid wire with H10Mn2SiMoA core for CO2 or Ar-CO2 gas shielded welding of structures requiring 550 MPa tensile strength.
Product Overview
AK-ER55-D2 is a solid welding wire designed for gas shielded arc welding using CO2 or Ar-CO2 mixtures. It has a H10Mn2SiMoA core and a copper-plated surface to ensure consistent feeding and good electrical conductivity.
The wire is classified under GB/T 8110 ER55-D2 and is intended for welding low-alloy high-strength steels with a minimum tensile strength of 550 MPa. It delivers stable arc performance and good weld metal properties in demanding structural applications.
Application: It is suitable for welding low-alloy high- strength steel structures with a tensile streng th of 550MPa, such as vehicles, ships, bridges, pipelines, power stat-ions, and containers. High rise buildings, petrochemicals, Chengong machinery, lifting and transportation equipment, boilers and pressure vessels, etc.
Key Benefits
Suitable for High-Strength Structural Applications.
The wire is formulated for welding low-alloy high-strength steels with a tensile strength of 550 MPa, making it suitable for use in vehicles, ships, bridges, pipelines, power stations, containers, high-rise buildings, petrochemical equipment, and pressure vessels.
Stable Welding Process with CO2 or Ar-CO2 Shielding.
AK-ER55-D2 performs well with both pure CO2 and Ar-CO2 shielding gases, offering consistent arc stability and good weld bead appearance across various joint types.
Copper-Plated Surface for Smooth Feeding.
The copper-plated surface ensures reliable feeding through the wire feeder and reduces wear on contact tips during continuous welding operations.
Controlled Chemical Composition for Consistent Performance.
The wire contains controlled levels of carbon (0.07–0.12%), manganese (1.6–2.1%), silicon (0.5–0.8%), molybdenum (0.4–0.6%), and other elements to support strength and toughness in the deposited metal.
Where It Is Used
- Welding of low-alloy high-strength steel structures in vehicles and ships.
- Bridge and pipeline construction requiring 550 MPa tensile strength.
- Power station and petrochemical equipment fabrication.
- High-rise building frames and lifting and transportation equipment.
- Boilers and pressure vessels made from high-strength low-alloy steel.
Who It Is For
- Welding consumable distributors supplying solid wires for structural fabrication.
- Fabricators working with low-alloy high-strength steels in heavy industry.
- Contractors involved in bridge, ship, and pressure vessel construction.
Problems It Solves
- Matching filler metal chemistry to low-alloy high-strength steels with 550 MPa tensile strength to meet structural code requirements.
- Ensuring consistent weld performance across CO2 and Ar-CO2 shielding gas options without changing wire type.
- Reducing wire feeding issues in automated or semi-automated welding lines through a copper-plated surface.
Specifications
Published by the factory for AK-ER55-D2. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | GB/T 8110 ER55-D2 |
| Element | Content |
|---|---|
| C | 0.07-0.12 |
| Mn | 1.6-2.1 |
| P | 0.025 |
| S | 0.025 |
| Si | 0.5-0.8 |
| Mo | 0.4-0.6 |
| Cu | 0.50 |
| Ni | 0.15 |
| Other | 0.50 |
Mechanical property data for this grade is not published on the factory datasheet. Ask our technical team for the test record before you qualify it.
Technical Features
- Solid welding wire with H10Mn2SiMoA core and copper-plated surface.
- Classified under GB/T 8110 ER55-D2 for low-alloy high-strength steel welding.
- Carbon content: 0.07–0.12%
- Manganese content: 1.6–2.1%
- Silicon content: 0.5–0.8%
- Molybdenum content: 0.4–0.6%
- Copper content: 0.50%
- Nickel content: 0.15%
- Phosphorus content: 0.025%
- Sulfur content: 0.025%
- Other elements: up to 0.50%
Use Guide
- Select wire diameter based on joint thickness and welding position; ensure compatibility with the wire feeder and power source.
- Use CO2 or Ar-CO2 shielding gas as specified in the welding procedure specification.
- Clean joint surfaces of oil, rust, paint, and moisture before welding to avoid porosity and defects.
- Maintain proper gas flow rate and shielding gas coverage to prevent oxidation and ensure sound welds.
- Store wire in sealed packaging to prevent moisture absorption and maintain surface quality.
How It Compares
AK-ER55-D2 is a solid wire for CO2 or Ar-CO2 shielded welding of high-strength low-alloy steels. It differs from flux-cored wires by offering a cleaner weld with no slag and lower spatter. It is not intended for use with pure argon shielding gas, which may result in poor arc stability and excessive spatter.
Related Articles
Technical background on this grade from the AKWELD knowledge centre.
Related Grades
Other welding wire in the same family.
AK-ER55-D2 Questions
What standards does AK-ER55-D2 meet?
What is the tensile strength of the deposited metal?
Which shielding gases can be used with this wire?
What is the chemical composition of the wire?
What packing is AK-ER55-D2 supplied in?
Can we test AK-ER55-D2 before placing a production order?
Request a Quotation for AK-ER55-D2
Send the diameter, the quantity and the destination port. Our technical team replies with packing, pricing and the data you need to qualify the grade.