Direct from our state-of-the-art Chinese manufacturing plant. Engineered for high performance, strength, and strict standard compliance.
Why modern industrial processes rely on high-silicon alloy formulations for stainless steel fabrication.
Standard ER308L welding wire has long been the baseline for welding standard 304 and 304L stainless steels. However, automated manufacturing and strict cosmetic standards have driven the demand for ER308LSi. The inclusion of elevated silicon levels (0.65% to 1.00%) substantially decreases the surface tension of the molten weld pool.
This decreased surface tension yields significant mechanical and aesthetic advantages:
| Alloy Specification | C % | Cr % | Ni % | Mo % | Mn % | Si % (Silicon Advantage) |
|---|---|---|---|---|---|---|
| AWS A5.9 ER308L (Standard) | ≤ 0.03 | 19.5 – 22.0 | 9.0 – 11.0 | ≤ 0.75 | 1.0 – 2.5 | 0.30 – 0.65 |
| AWS A5.9 ER308LSi (High Fluidity) | ≤ 0.03 | 19.5 – 22.0 | 9.0 – 11.0 | ≤ 0.75 | 1.0 – 2.5 | 0.65 – 1.00 |
Pioneering Excellence in Welding Solutions Since 2004
Established in Wulian, Rizhao City, Shandong Province, Wulian Yuxin Hardware Equipment Co., Ltd. has grown from a regional manufacturer to a globally recognized producer of premium welding consumables. Operating out of our 15,000-square-meter modern production facility, we maintain absolute control over the entire raw material processing and wire drawing cycle. This ensures high dimensional precision, perfect cast, and helix parameters.
With an annual output exceeding 3,000 tons, we supply distributors, shipyards, structure builders, and vehicle manufacturers across Europe, Southeast Asia, Africa, and South America.
How China-manufactured ER308LSi filler rods support major infrastructure projects worldwide.
Low-temperature storage tanks and process pipelines require absolute joints to resist cryogenic cracking. Our ER308LSi rods undergo strict testing for delta ferrite content to provide crack resistance down to -196°C.
With thin sheets of 304 stainless steel welded at high speeds, modern exhaust manufacturers utilize robotic TIG/MIG welding. The enhanced wetness of ER308LSi minimizes defects on thin-walled components.
Sanitary standards demand crevice-free joints to avoid bacteria cultivation. The smooth weld profile of ER308LSi minimizes clean-up grinding, keeping processing units sanitary and compliant.
Aligning Chinese manufacturing precision with global safety, testing, and distribution regulations.
For wholesale buyers and industrial plants, compliance is non-negotiable. At Wulian Yuxin, our quality control conforms to international frameworks. Every batch of ER308LSi filler rods is shipped with full mill test certification (MTR) according to EN 10204 3.1, tracing the melt back to its raw material wire rod stock.
Our compliance parameters cover:
How Wulian Yuxin approaches wire chemistry design, eco-conscious packaging, and automated drawing tech.
We are upgrading our high-speed continuous drawing blocks to include digital wire diameter monitoring. This ensures less than ±0.01mm variance in ER308LSi rods, optimizing feeding for robotic systems.
Our lab is testing trace additions of elements (e.g., Titanium, Niobium) to further refine grain structures, improving joint toughness at low temperatures and resistance to warm sulfuric environments.
To reduce plastic waste globally, Wulian Yuxin is introducing cardboard-only spools and biodegradable protective wraps for all bulk international TIG and MIG wire shipments.
Take a virtual tour of our 15,000㎡ plant where high-precision drawing, polishing, and packaging occur.
Expert answers to common engineering questions regarding the application, mechanical properties, and metallurgy of ER308LSi rods.
The primary advantage is the elevated silicon content (0.65% to 1.00% in ER308LSi compared to 0.30% to 0.65% in standard ER308L). The extra silicon acts as a deoxidizer, increasing the fluidity of the molten weld pool. This improves the wetting action along the weld edges, leading to flatter beads with minimal tie-in issues. This makes it ideal for robotic, automated, and high-speed MIG/TIG applications.
Yes. ER308LSi is specifically formulated to weld 18Cr-8Ni stainless steels, including type 301, 302, 304, 304L, 308, and 308L. The low carbon content (less than 0.03%) prevents carbide precipitation at the grain boundaries, which prevents intergranular corrosion during operation.
For Gas Metal Arc Welding (MIG), we recommend using a mixture of Argon and 1-2% Oxygen or Argon mixed with 2-5% CO2. This mix optimizes arc stability while keeping oxidation low. For Gas Tungsten Arc Welding (TIG), pure 100% Argon is standard to ensure clean coverage and avoid contamination.
Wulian Yuxin controls the chemical composition of ER308LSi to achieve a Ferrite Number (FN) typically between 4 and 10 (based on the WRC-1992 diagram). This amount of delta ferrite is crucial because it dissolves impurities like sulfur and phosphorus, preventing hot cracking or microfissuring during cooling, while maintaining low-temperature impact strength.
No, the increased silicon content within the AWS/ISO specification limit (up to 1.00%) does not lower corrosion resistance. The low carbon content is the primary factor in resisting sensitization and intergranular corrosion in chemical and marine environments.
Our facility holds ISO9001:2015 certification, and our products carry CE marking. We provide Mill Test Certificates (MTRs) to EN 10204 3.1 with chemical analysis and mechanical testing reports for every production run.
Yes. The austenitic structure of ER308LSi weld metal retains good impact toughness at extremely low temperatures, making it suitable for LNG installations and cryogenic liquid pipelines. For extreme temperatures, verify the weld's ferrite level to ensure it meets requirements.
For TIG filler rods, we offer 5kg or 10kg plastic tubes. For MIG solid wires, we provide standard plastic spools (D200, D300) containing 5kg or 15kg of precision-layer wound wire. We also support bulk supply options, such as 250kg pay-off drums for high-duty automated production lines.
Every batch is wrapped in moisture-resistant plastic film, packed with industrial desiccant packets, and sealed in thick cardboard boxes. These boxes are palletized, shrink-wrapped, and strapped to withstand humidity and salt exposure during sea transport.
Our standard production lead time is 20 to 30 days after order confirmation and deposit receipt. This depends on our order book and volume requirements. We also keep safety stocks of popular wire sizes to enable faster shipping.
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Contact Wulian Yuxin's engineering sales team today. We provide free material consultations, customized spool packaging, and volume wholesale pricing.
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