Explore our top-performing range of industrial welding wire and electrodes, engineered to international standards.
Pioneering Excellence in Welding Solutions Since 2004
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.
Our capabilities stem from vertically integrated operations—from high-precision wire drawing and chemical composition adjustment to automatic packaging. By maintaining strict control over steel billet selection and heat treatment profiles, we ensure our ER316 TIG filler rods deliver a stable arc, minimal spatter, and pristine bead aesthetics under high-purity shielding gases.
Understanding chemical properties and structural advantages of molybdenum-stabilized stainless welding consumables.
ER316 and ER316L (Low Carbon) TIG filler rods are the cornerstone of high-performance piping and structural welding in aggressive chemical environments. The addition of Molybdenum (2.0-3.0%) increases the critical pitting temperature and prevents local crevice corrosion in chloride-rich solutions. Crucially, by limiting the carbon content to less than 0.03% (for the 'L' grades), Wulian Yuxin effectively suppresses chromium carbide precipitation along grain boundaries at temperatures ranging from 425°C to 815°C (also known as the sensitization range). This structural configuration guarantees that the welded joint retains its full corrosion resistance without requiring post-weld annealing treatment.
| Element | AWS A5.9 ER316L Requirement (%) | Yuxin Certified Batch Average (%) | Metallurgical Purpose |
|---|---|---|---|
| Carbon (C) | ≤ 0.030 | 0.018 | Prevents sensitization and intergranular cracking. |
| Chromium (Cr) | 18.0 - 20.0 | 19.10 | Ensures basic passive layer generation on weld surface. |
| Nickel (Ni) | 11.0 - 14.0 | 12.20 | Stabilizes austenitic structure and improves impact toughness. |
| Molybdenum (Mo) | 2.0 - 3.0 | 2.45 | Resists pitting and crevice corrosion in chloride media. |
| Manganese (Mn) | 1.0 - 2.5 | 1.75 | Deoxidizer, helps reduce hot cracking tendencies. |
| Silicon (Si) | 0.30 - 0.65 | 0.48 | Optimizes arc stability and molten metal fluidity. |
Our metallurgical team keeps the Delta Ferrite level (FN - Ferrite Number) of the weld deposits strictly within the 4 to 10 range. This balance is critical: enough ferrite is preserved to prevent hot micro-cracking (solidification cracking) during fast cooling, while keeping it low enough to prevent sigma phase embrittlement in high-temperature or cryogenic installations.
A continuous investment in manufacturing efficiency and technological integration enables us to support global infrastructure builders.
Our annual production capacity of 3,000 tons allows us to reliably serve clients across five continents, with particular strength in European and Southeast Asian markets. All products meet stringent international standards, including ISO9001 and CE certifications, and undergo rigorous quality control at every production stage. With automated draw lines and integrated straightening machinery, Yuxin provides a steady supply of filler materials to large-scale infrastructure projects worldwide.
Pioneering tomorrow's welding technologies to handle demanding chemical environments and cryogenic limits.
Our upcoming electrochemical cleaning line removes residual drawing lubricants completely, reducing porosity in high-purity argon-shielded welds by up to 95%.
Integrating optical diameter scanners and laser straightness monitors at our Wulian factory to ensure seamless feeding in mechanized and robotic orbital TIG setups.
Developing modified ER316L formulations containing nitrogen micro-additions to improve mechanical strength and toughness down to -196°C for LNG storage.
Reliable weldments constructed for long-term performance across demanding environments.
Operating environments rich in sodium chloride require robust alloys to resist pitting. Our ER316L filler metal provides long-term reliability for marine cooling water loops, desalination pipes, and boat fittings.
Sulfuric, phosphoric, and organic acid environments require stable weld compositions. Yuxin's strict controls keep carbon under 0.03%, helping prevent intergranular attack in thermal zones.
Cleanrooms and sterile process piping require flat, defect-free welds. The clean surfaces of our TIG rods prevent slag inclusion and simplify the polishing of interior pipe surfaces.
Liquefied natural gas (LNG) tanks operate at sub-zero temperatures. Carefully adjusted ferrite values ensure our ER316 welds resist brittle fracture under high pressures at cryogenic levels.
How Wulian Yuxin merges technical precision with capacity stability to protect global procurement timelines.
Operating a 15,000-square-meter facility in Shandong Province, Wulian Yuxin Hardware Equipment Co., Ltd. has integrated automation into critical phases of our manufacturing lines. Raw wire rod coils are drawn on automated machines that continuously measure diameter tolerances, achieving stability down to ±0.02 mm. Following clean annealing, our computer-controlled cutting and stamping stations automatically engrave each individual rod on both ends with "316L", ensuring material traceability for critical jobs.
In addition, our automated packaging systems place finished rods in hermetically sealed plastic containers to prevent moisture and contamination during transit. This integrated setup keeps our operational overhead low, allowing us to supply large distributors with high-quality consumables that meet international standards.
Ensuring full compliance with international standards and direct supply reliability.
Wulian Yuxin supports distributors, engineering firms, and fabricators across diverse jurisdictions. Every shipment is accompanied by a Mill Test Certificate (MTC) to EN 10204 3.1, providing chemistry and physical test data. We maintain full compliance with European CE regulations under EN 13479 and American Welding Society AWS A5.9 protocols. Our logistic networks cover major ports including Qingdao, enabling efficient transport routes to Europe, Southeast Asia, South America, and Africa.
Today, our products are trusted by industrial clients in over 20 countries worldwide. From major construction projects in Germany to manufacturing plants in Vietnam, our welding solutions form invisible bonds that hold critical infrastructure together. Our export markets include:
Important factors for purchasing managers and quality inspectors selecting TIG filler metal suppliers.
Wavy wire disrupts feeding in automated systems. Ensure filler rods are straight, allowing the welder to maintain a precise arc position without manual adjustments.
Remaining drawing soaps contain carbon and sulfur. Ensure suppliers use solvent washing and ultrasonic cleaning lines to verify oil-free wire surfaces.
Avoid mixing alloys on the shop floor. Premium rods are stamped at both ends with their grade classification (e.g., ER316L) to prevent mixing during fabrication.
Answers to common technical questions about 316/316L TIG welding applications.
The primary difference lies in the Carbon content: ER316 specifies a maximum Carbon content of 0.08%, whereas ER316L restricts the Carbon content to 0.03% or lower. This low-carbon chemistry reduces the risk of chromium carbide precipitation (sensitization) during welding. Consequently, ER316L is preferred for applications operating in highly corrosive media where post-weld heat treatment is not practical.
Delta Ferrite is critical for preventing hot cracking in the weld pool during solidification. Fully austenitic structures are highly sensitive to cracking. By adjusting the composition to yield a Ferrite Number (FN) between 4 and 10, we ensure clean weld runs. For cryogenic applications, keeping the ferrite number controlled prevents embrittlement at extremely low temperatures.
High-purity (99.99%) Argon gas is the standard choice. For thick sections, adding 1% to 2% Hydrogen can improve molten puddle fluidity and speed up welding. However, hydrogen mixes should be avoided on high-strength steels to prevent cracking. Helium/Argon mixes can also be used when deep penetration is required.
Yes, ER316L is commonly used to join 304 to 316 stainless steels. The resulting weld joint provides properties that meet the service limits of the 304 base metal. However, if you are joining stainless steels to carbon steel, ER309L is typically recommended to accommodate carbon dilution without cracking.
Our TIG filler rods are packed in rigid, plastic tubes that exclude humidity and dust. Each tube is labeled with its batch number and chemistry. Outer packaging uses strong cardboard boxes on pallets to ensure safe arrival through international shipping channels.
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See our welding consumables in various construction and assembly operations.
A comprehensive list of products for structural and high-corrosion welding applications.
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