AK-TH600NQII Low-Alloy Weathering Steel Wire for Ar-rich Gas Shielded Welding.
A gas shielded welding wire formulated for Q600NQ and equivalent weathering steel, with controlled S and P and alloying elements for enhanced atmospheric corrosion resistance and mechanical performance.
Product Overview
AK-TH600NQII is a low-alloy weathering steel welding wire designed for gas metal arc welding using an 80% Ar + 20% CO2 shielding gas mixture. It is intended for use with Q600NQ and equivalent grade weathering steels.
The wire contains controlled levels of copper, chromium, and nickel, which contribute to improved atmospheric corrosion resistance in varying climatic conditions. Sulfur and phosphorus content are strictly limited to 0.020% and 0.025% respectively, supporting crack resistance and weld metal integrity.
Application: Used for welding of Q600NQ and equivalent grade weathering steel.
Key Benefits
Enhanced Atmospheric Corrosion Resistance.
The inclusion of Cu, Cr, and Ni in the wire composition promotes the formation of a stable protective oxide layer on the weld surface, reducing degradation in outdoor and harsh environments.
Controlled S and P for Crack Resistance.
Sulfur is limited to 0.020% and phosphorus to 0.025%, minimizing the risk of hot cracking and improving the toughness of the deposited metal.
Mechanical Properties Match Base Metal.
The wire delivers mechanical properties suitable for high-strength weathering steel applications, with a tensile strength of at least 550 MPa and yield strength of at least 450 MPa.
Compatible with 80% Ar + 20% CO2 Shielding Gas.
Optimized for use with an 80% argon + 20% carbon dioxide gas mixture, ensuring stable arc, good bead appearance, and consistent weld quality.
Where It Is Used
- Welding of Q600NQ weathering steel structures.
- Fabrication of bridges and outdoor steel structures exposed to variable climates.
- Maintenance and repair of weathering steel components in transportation and infrastructure.
- Applications requiring long-term durability in corrosive environments.
Who It Is For
- Steel structure fabricators working with high-strength weathering steels.
- Bridge and infrastructure contractors requiring corrosion-resistant welds.
- Maintenance teams repairing weathering steel assets in outdoor service.
- Welding distributors supplying consumables for weathering steel projects.
Problems It Solves
- Achieving weld metal corrosion resistance comparable to the base metal in weathering steel applications.
- Avoiding weld cracking due to high sulfur and phosphorus content in filler metal.
- Matching mechanical properties of the weld to the base metal strength grade Q600NQ.
- Ensuring consistent performance with a single, certified wire instead of multiple grades.
Specifications
Published by the factory for AK-TH600NQII. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | TB/T 2374 ER60-G |
| Element | Content |
|---|---|
| C | 0.10 |
| Mn | 1.2-1.6 |
| P | 0.025 |
| S | 0.020 |
| Si | 0.60 |
| Cu | 0.20-0.50 |
| Ni | 0.20-0.60 |
| Cr | 0.30-0.90 |
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
- Formulated for gas metal arc welding with 80% Ar + 20% CO2 shielding gas.
- Chemical composition includes Cu 0.20-0.50%, Cr 0.30-0.90%, Ni 0.20-0.60%, and Mn 1.2-1.6%
- Sulfur content limited to 0.020% and phosphorus to 0.025%
- Supplied to TB/T 2374 ER60-G standard.
- Tensile strength of the deposited metal at least 550 MPa, yield strength at least 450 MPa.
Use Guide
- Select wire diameter based on joint thickness and welding position.
- Set welding parameters within the recommended range for the selected diameter and joint configuration.
- Ensure shielding gas flow is stable and within the specified range to prevent porosity and ensure proper protection.
- Clean base metal surfaces of rust, oil, paint, and moisture before welding to avoid contamination and porosity.
- Use proper storage and handling practices to prevent moisture absorption, especially in humid environments.
How It Compares
AK-TH600NQII is designed specifically for weathering steel welding and provides corrosion resistance through alloying with Cu, Cr, and Ni. Unlike standard low-carbon steel wires, it maintains weld metal integrity and appearance in outdoor conditions. It is not intended for use with non-weathering steels where such alloying is unnecessary. For applications requiring higher strength or different corrosion resistance, other wire types such as those for duplex or nickel alloys would be required.
Related Grades
Other welding wire in the same family.
AK-TH600NQII Questions
What standard does AK-TH600NQII meet?
What are the key alloying elements in the wire?
What are the maximum sulfur and phosphorus levels?
What shielding gas is recommended?
What packing is AK-TH600NQII supplied in?
Can we test AK-TH600NQII before placing a production order?
Request a Quotation for AK-TH600NQII
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.