Engineered for unparalleled structural integrity, arc stability, and defect-free welding operations.
Founded in Wulian, Rizhao City, Shandong Province, Wulian Yuxin Hardware Equipment Co., Ltd. has established itself as an authoritative leader in the development and large-scale manufacturing of high-performance welding consumables. For nearly two decades, we have focused on bridging the gap between advanced metallurgical science and the practical demands of structural engineering.
Operating out of our state-of-the-art 15,000-square-meter fabrication facility, we implement a vertically integrated manufacturing process. This allows us to exercise complete oversight over material inputs, wire drawing, copper plating, and winding. Our adherence to international quality management guidelines ensures that every metric ton of Mild Steel TIG wire meets or exceeds global expectations.
How top-tier Mild Steel TIG wire empowers major infrastructure, process piping, and automotive manufacturing.
TIG welding (GTAW) is the standard for root passes in pressure vessels and high-pressure steam pipelines. Our mild steel wires provide optimal fluidity and bead control, reducing slag inclusions and passing stringent radiographic tests (RT).
Precision chassis work and exhaust components require thin, high-integrity welds. The consistency of Wulian Yuxin's ER70S-6 chemistry guarantees minimal spatter, stable arc generation, and smooth wire feed capabilities.
From bridges to commercial skyscrapers, structural joints demand high impact toughness and yield strength. Our wires satisfy ISO and CE standards to guarantee mechanical robustness under static and dynamic loading forces.
Why Silicon (Si) & Manganese (Mn) ratios matter: In mild steel TIG welding, surface mill scale, rust, and surface impurities are common. If the welding wire lacks sufficient deoxidizers, oxygen reacts with carbon in the weld pool, forming carbon monoxide gas and resulting in internal porosity. By maintaining precise limits of Si (0.80% - 1.15%) and Mn (1.40% - 1.85%) in our flagship ER70S-6 wires, we ensure these elements bind with impurities first, forming a thin slag layer that floats harmlessly to the surface, resulting in pristine X-ray-quality welds.
Engineered to align with global standards including AWS A5.18, EN ISO 636-A, and GB/T 8110.
| Wire Classification | C (%) | Mn (%) | Si (%) | P & S (%) | Cu (%) | Tensile Strength | Yield Strength |
|---|---|---|---|---|---|---|---|
| ER70S-6 (TIG / GTAW) | 0.06 - 0.15 | 1.40 - 1.85 | 0.80 - 1.15 | ≤ 0.025 | ≤ 0.50 (Coating) | ≥ 480 MPa | ≥ 400 MPa |
| ER70S-3 | 0.06 - 0.15 | 0.90 - 1.40 | 0.45 - 0.75 | ≤ 0.025 | ≤ 0.50 | ≥ 480 MPa | ≥ 400 MPa |
| ER70S-2 | ≤ 0.07 | 0.90 - 1.40 | 0.40 - 0.70 | ≤ 0.025 | ≤ 0.50 (w/ Ti, Zr, Al) | ≥ 480 MPa | ≥ 400 MPa |
*Note: Standard shielding gas recommended for mild steel GTAW process: 100% Argon. Flow rate: 10-15 L/min.
Explore our 15,000-square-meter factory where quality, volume, and technological integration meet.
With an annual production footprint of 3,000 tons, Wulian Yuxin Hardware Equipment Co., Ltd. regularly supplies major distributors and end-users in over 20 countries. Our strategic proximity to major ports in Shandong allows for rapid lead times and consolidated shipments.
We optimize local distribution logistics by collaborating with established partners in:
How our internal test protocols exceed standards, offering reliable traceability for high-risk projects.
Every batch of incoming steel rods undergoes optical emission spectrometry (OES) to guarantee that trace elements like Lead (Pb), Antimony (Sb), and Tin (Sn) are kept below harmful levels, ensuring weld pool purity.
Our drawing dies are monitored via laser measurement units. Wulian Yuxin maintains a diameter tolerance benchmark that is 30% stricter than standard ISO requirements (+/- 0.01mm limit vs standard +/- 0.03mm).
TIG wires require excellent shelf life. Our electro-plating line applies a uniform micro-thin layer of copper that prevents rusting in high-humidity storage environments without causing copper-embrittlement inside the weld bead.
We leverage our chemical synthesis and formulation capabilities to cater to both standard carbon steel structures and high-strength low-alloy (HSLA) steels. Check out our main application categories below:
How Wulian Yuxin is adapting to green manufacturing, carbon-neutral steel, and robotically integrated GTAW processes.
As global factories pivot towards robotic automation, wire feeding consistency is key. We are redesigning wire surface finishes to ensure seamless mechanical feeding in automatic TIG orbital systems, minimizing down-time and nozzle wear.
To reduce the environmental footprint and fumes associated with copper vaporization during welding, our R&D team is developing a line of highly stable, copper-free mild steel TIG rods using specialized surface passivants.
Wulian Yuxin is introducing 100% recyclable, moisture-resistant packaging. This removes the reliance on non-biodegradable plastics while keeping the product completely rust-free during marine transit.
Answering the most critical technical and supply chain questions from engineers and procurement managers.
A: ER70S-6 contains higher levels of Manganese (1.40-1.85%) and Silicon (0.80-1.15%) than ER70S-2. These act as powerful deoxidizers, making ER70S-6 the preferred choice when welding over light rust, mill scale, or minor surface contaminants. ER70S-2 contains added titanium, zirconium, and aluminum, which makes it ideal for specialized applications but less forgiving on oxidized surfaces.
A: We utilize advanced chemical cleaning prior to electroplating. This process ensures high adhesion of the copper layer at the molecular level. Our strictly controlled plating thickness guarantees robust corrosion resistance without copper flaking, which can clog contact tips and contaminate the weld.
A: 100% Argon (Ar) is standard for GTAW processes on carbon/mild steels. For thick materials where higher thermal conductivity is needed, an Argon-Helium mix can be utilized to increase penetration depth and travel speeds.
A: Yes. All our products conform to CE standards under EN 13479, and our manufacturing facilities operate under ISO 9001:2015 certifications. Complete Mill Test Certificates (MTC) matching EN 10204 3.1 are provided with every batch to ensure traceability.
A: When stored in dry conditions with controlled humidity (less than 60% RH) and in its original sealed packaging, our copper-coated wire has a shelf life exceeding 24 months without any degradation of weld quality or surface oxidation.
A: Yes, as a leading factory, we support full OEM customization, including custom branding, packaging design, and wire lengths (e.g., standard 1000mm rods or customized sizes) to suit your regional market demands.
Providing high-precision wire and electrodes for MIG, TIG, and MMA applications globally.
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