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Home / Products / Welding wire / ER70S-6
TKweld’s OEM Carbon Steel Copper Coated Welding Wire is a reliable, high-performance solution for a wide range of welding needs. Designed to meet AWS A5.18 ER70S-6 standards, this solid welding wire provides consistent results and dependable performance for professional welders and hobbyists alike. Available in 0.8 mm and 0.9 mm diameters, the wire is optimized for CO2 gas-shielded welding applications, delivering smooth arcs, excellent bead appearance, and strong, quality welds.
Manufactured from carbon steel and copper coated for superior conductivity and Feedability, this welding wire minimizes contact tip wear and reduces the risk of feeding issues during continuous welding. The copper coating also helps protect the wire from corrosion and surface contamination, so you get steady, reliable performance even in busy shop environments. The result is fewer interruptions, less rework, and improved overall productivity.
TKweld’s ER70S-6 chemistry is formulated to be forgiving and versatile. It contains Deoxidizers that help prevent porosity and ensure sound weld metal, making it suitable for welding in various positions and on different carbon steel base materials. This makes the wire an excellent choice for general fabrication, structural steel work, automotive repair, tank and vessel construction, and maintenance welding. Its composition supports good tensile strength and ductility, producing welds that are both strong and resilient under stress.
Ease of use is a hallmark of TKweld’s welding wire. The consistent diameter tolerance and smooth copper finish allow for steady wire feeding through MIG guns and welding machines. Welders will notice reduced spatter and a more stable arc, which contributes to cleaner welds and less time spent on cleanup. The wire’s formulation promotes good slag removal and smooth bead contour, making finished welds look professional with less effort.
TKweld’s OEM Carbon Steel Copper Coated Welding Wire is manufactured under strict quality control to ensure each spool meets performance expectations. The wire is wound carefully to prevent kinks and tangles, aiding in seamless machine loading and operation. Whether you are working in a small shop or on a large industrial job site, the reliable packaging and consistent spool quality support efficient workflow and minimal downtime.
Safety and compatibility are key considerations in the design of this product. TKweld’s ER70S-6 wire is tailored for use with CO2 shielding gas, a common choice for achieving deep penetration and strong welds in carbon steel welding. Proper use with CO2 ensures optimal weld properties and reduces the likelihood of defects. As always, welders should follow recommended safety practices, including appropriate ventilation and personal protective equipment.
In addition to performance, TKweld places emphasis on value. This OEM offering provides a cost-effective option without compromising on quality. The balance of affordability and dependable results makes it a smart choice for shops looking to manage costs while maintaining high welding standards. Bulk availability and consistent spool sizes make inventory management simple for procurement teams and shop owners.
For those who require a wire that performs well across a variety of tasks, TKweld’s OEM Carbon Steel Copper Coated Welding Wire is a solid pick. Its ER70S-6 classification ensures dependable weld metal properties, while the copper coating and precise manufacturing translate into smoother feeding and reduced machine wear. The 0.8 mm and 0.9 mm sizes provide flexibility for different welding currents and applications, making it easy to choose the right diameter for your equipment and project needs.
TKweld’s ER70S-6 copper coated welding wire blends consistent quality, ease of use, and economic value. It delivers steady arc performance, reliable weld integrity, and cleaner results with less spatter. Whether you are tackling repair jobs, fabrication, or heavy structural work, this wire offers the dependable performance needed to get the job done right. Choose TKweld’s OEM Carbon Steel Copper Coated Welding Wire for dependable, professional-grade welding results every time


Items |
C |
Mn |
Si |
S |
P |
Standard Value |
0.06-0.15 |
1.40 -1.85 |
0.80 -1.15 |
≤0.025 |
≤0.025 |
Case of Value |
0.08 |
1.50 |
0.89 |
0.012 |
0.013 |
Items |
Ni |
Cr |
Mo |
V |
Cu |
Standard Value |
≤0.15 |
≤0.15 |
≤0.15 |
≤0.03 |
≤0.50 |
Case of Value |
0.03 |
0.02 |
0.002 |
0.003 |
0.11 |
Items |
Tensile Strength
Rm/MPa
|
Yield Strength Rel/Rp0.2 MPa |
Elongation A/% |
Charpy V-notch impact energy KV2(J)-30℃ |
Standard Value |
≥500 |
≥420 |
≥22 |
≥27 |
Case of Value |
560 |
450 |
26 |
108 |
Welding wire diameter (mm) |
0.8 |
1.0 |
1.2 |
1.6 |
Welding current (A) |
50 - 180 |
70 - 230 |
80 - 350 |
120 - 500 |






A: Yes, we have. One year warranty for welding rod
Q5: What's the package
A: 5kg; 15kg; 20kg as one spool
Q6: What is delivery time / lead time
A: The goods will be shipped within15-30 days after the receipt of your payment
A: 500kgs
A:1- 30% down payment for order confirmation, 70% before shipment. 2- 100% at sight LC