Direct supply from Wulian Yuxin's advanced factory with strict dimensional and chemical tolerance controls.
Established in Wulian, Rizhao City, Shandong Province, Wulian Yuxin Hardware Equipment Co., Ltd. has grown from a locally excellent manufacturer to a globally recognized producer of premium welding consumables. With our own 15,000-square-meter production facility and advanced manufacturing equipment, we proudly maintain complete control over our production processes, ensuring consistent quality across our entire product range.
As a leading Chinese supplier of 309 TIG filler rods, we have integrated raw material acquisition, precise drawing lines, and specialized chemical analysis to meet the high demands of contemporary industrial projects. Our commitment extends from providing precise metallurgical compliance to establishing long-term customer partnerships built on trust and stability.
A comprehensive overview of high-alloy welding chemistry and dilution control principles.
The ER309 TIG filler rod is a high-alloy welding consumable formulated primarily to join stainless steels to mild or low-alloy steels. It contains a higher concentration of Chromium (Cr) and Nickel (Ni) compared to standard grade 308 rods. This chemical composition is designed to tolerate dilution from carbon steel substrates during the welding process without forming brittle martensitic phases.
By preventing the creation of martensite, ER309 rods lower the risk of hot cracking and underbead micro-cracks. The low-carbon variant, ER309L, limits carbon levels to 0.03% or lower. This prevents chromium carbide precipitation at the grain boundaries when exposed to high temperatures, thereby maintaining corrosion resistance in the heat-affected zone (HAZ).
| Grade (AWS A5.9) | C % | Cr % | Ni % | Mn % | Si % | P % | S % | Mo % |
|---|---|---|---|---|---|---|---|---|
| ER309 | 0.08 max | 23.0 - 25.0 | 12.0 - 14.0 | 1.0 - 2.5 | 0.30 - 0.65 | 0.03 max | 0.03 max | 0.75 max |
| ER309L | 0.03 max | 23.0 - 25.0 | 12.0 - 14.0 | 1.0 - 2.5 | 0.30 - 0.65 | 0.03 max | 0.03 max | 0.75 max |
| ER309LSi | 0.03 max | 23.0 - 25.0 | 12.0 - 14.0 | 1.0 - 2.5 | 0.65 - 1.00 | 0.03 max | 0.03 max | 0.75 max |
Discover how Wulian Yuxin optimizes operations to provide cost-effective, high-quality welding solutions globally.
We source steel wire rods from verified Chinese steel mills, ensuring consistent elemental properties and minimal batch-to-batch chemical variations.
Our workshop utilizes automated wire drawing and cleaning machines to ensure consistent diameter control and a surface finish free of lubricants or oxides.
Located in Shandong Province near Qingdao Port, Wulian Yuxin offers convenient access to sea freight routes for efficient global delivery.
Ensuring compliance, documentation, and customized packaging options for international buyers.
Global procurement requires careful attention to regional standards, packaging types, and quality certifications. At Wulian Yuxin, we support local distributors, engineering procurement contractors (EPCs), and manufacturing plants by adapting to localized compliance frameworks.
Each batch of our 309 TIG filler rods is delivered with EN 10204 3.1 Mill Test Certificates (MTC). This certificate documents the batch's chemical composition and mechanical properties, ensuring transparency and conformance to standards like ISO 9001 and CE.
To prevent physical damage and oxidation during transit, we offer customized packaging configurations:
Explore Wulian Yuxin's broad range of industrial welding consumables and application cases.
ER309/ER309L rods are widely utilized in heavy industries for critical joints and protective cladding.
Ideal for joining austenitic stainless steel (such as 304, 304L, 316, or 316L) to mild steel, carbon steel, or low-alloy steel. It helps prevent cracking caused by metallurgical mismatch.
Used to apply a corrosion-resistant barrier layer on carbon steel vessels, heat exchangers, and pipe systems prior to applying a final layer of ER308L or ER316L.
Used in high-temperature environments like furnace parts, kiln linings, and heat treatment baskets where high-temperature oxidation resistance is needed.
Real-world industrial installations and projects using Wulian Yuxin consumables.
Take a virtual tour of our 15,000-square-meter modern manufacturing base in Rizhao City.
Showcasing our industrial capabilities and building global relationships at leading international trade shows.
Analyzing technical progress and market demands in the global welding industry.
Modern manufacturing demands higher precision, driving the growth of automated TIG systems. This requires high-consistency filler rods with precise dimensional tolerances to prevent feeding jams in automatic feeders.
Regulatory frameworks are pushing for reduced emissions and recyclable packaging. Wulian Yuxin is investing in biodegradable storage tubes and low-fume wire formulations to help buyers meet ESG goals.
With the expansion of renewable energy and LNG transport networks, the demand for joining high-strength steels and dissimilar metals is growing. This increases the usage of high-alloy consumables like ER309L and nickel-based alloys.
Clear metallurgical answers to support informed purchasing decisions.
Select from our complete range of MIG, TIG, and electrode welding supplies.
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