Engineered to comply with stringent European, American, and Asian structural criteria.
For industrial structures exposed to aggressive environments, material selection is critical. Gas Tungsten Arc Welding (GTAW or TIG) utilizing AWS Class ER316 and ER316L welding wires provides excellent joint integrity. The primary advantage of these alloys lies in their specific composition, which includes 2% to 3% Molybdenum (Mo) alongside Chromium and Nickel.
Molybdenum increases resistance to localized corrosion, particularly pitting and crevice corrosion, in chloride-laden media. Lowering the carbon threshold in ER316L (limiting carbon to a maximum of 0.03%) prevents chromium carbide precipitation at grain boundaries during thermal exposure. This maintains corrosion resistance in post-weld configurations without requiring subsequent heat treatment.
Controlled Delta Ferrite levels are critical to preventing hot cracking during solidification. Leading Chinese manufacturers utilize precise laser-induced composition adjustments to balance elements and keep the Ferrite Number (FN) within the optimal range of 3 to 8, providing crack resistance during welding without compromising low-temperature impact properties.
| Alloy Grade | C (%) | Mn (%) | Si (%) | Cr (%) | Ni (%) | Mo (%) | Ferrite Number (FN) |
|---|---|---|---|---|---|---|---|
| ER316 | ≤ 0.080 | 1.0 - 2.50 | 0.30 - 0.65 | 18.0 - 20.0 | 11.0 - 14.0 | 2.00 - 3.00 | 2 - 6 |
| ER316L | ≤ 0.030 | 1.0 - 2.50 | 0.30 - 0.65 | 18.0 - 20.0 | 11.0 - 14.0 | 2.00 - 3.00 | 3 - 8 |
| ER316LSi | ≤ 0.030 | 1.0 - 2.50 | 0.65 - 1.00 | 18.0 - 20.0 | 11.0 - 14.0 | 2.00 - 3.00 | 4 - 8 |
ER316/ER316L TIG wires are designed for demanding processing applications and heavy engineering works.
Suitable for pipes conveying warm acidic solutions, sulphur compounds, and hot organic acids. It prevents stress-corrosion cracking at thermal interfaces, ensuring durable petrochemical installations.
Designed for boat accessories, structural elements of naval vessels, and offshore oil platforms. The high molybdenum concentration helps mitigate severe chloride-induced crevice degradation.
Welding food processors, industrial pasteurizing vessels, and pharmaceutical reactors. It produces smooth, non-porous welds that prevent microbial growth and withstand chemical cleaning (CIP).
Based in Wulian, Rizhao City, Shandong Province, Wulian Yuxin Hardware Equipment Co., Ltd. has developed from a domestic manufacturer into an international producer of welding consumables. Operating a 15,000-square-meter facility, we oversee the entire production chain to deliver consistent wire specifications.
Our technical setups feature state-of-the-art wire drawing systems, computer-guided straightening, cut-to-length lines, and real-time eddy current testing. With an annual capacity exceeding 3,000 tons of alloy consumables, we provide prompt fulfillment and supply chain consistency for distributors, industrial agents, and structural contractors worldwide.
Our workshop showcases automated metallurgy processing designed for low-tolerance manufacturing.
By sourcing raw wires from leading domestic refineries, Wulian Yuxin ensures metallurgical consistency. Operating in Shandong Province, near major maritime shipping terminals, we facilitate cost-effective shipping routes to Europe, Southeast Asia, South America, and Africa.
This localized supply chain integration protects international clients from raw material fluctuations and long turnaround times. Additionally, our flexible OEM capabilities allow us to adjust alloy formulations, stampings (e.g., customized AWS markings), and packaging designs to meet specific distributor branding and technical requirements.
Innovation aligns our production processes with global environmental standards and advanced welding systems.
Modern manufacturing requires high-precision consumables. Our development focuses on wire diameter consistency and straightness to support automated TIG cold wire feed processes, preventing feed failure and contact tip degradation.
Wulian Yuxin is refining draw-oil recipes to utilize biodegradable, solvent-free lubricants. This reduces volatile fumes during welding, improving work environments without affecting arc characteristics.
By implementing advanced vacuum induction melting (VIM) and refining processes, we aim to minimize trace elements like phosphorus, sulfur, and trace bismuth. This helps prevent hot cracking in critical joints.
Our production facilities maintain certifications and quality controls to satisfy international engineering audits.
Wulian Yuxin holds complete ISO 9001:2015 and CE quality marks. Our ER316L TIG wires comply with AWS A5.9, EN ISO 14343-A, and GB/T 17853 classifications, facilitating engineering approvals across international jurisdictions.
Every shipment is labeled with dedicated furnace run identifiers. Our testing laboratory issues Mill Test Certificates (MTC) containing detailed chemical assays and mechanical property test results for every production batch.
From incoming wire rod inspections to laser measurement, eddy-current testing, and trial welding evaluations, our quality control team ensures every rod meets dimensional and structural requirements.
Technical answers to common questions about welding alloy consumables.
Explore our application cases and custom welding configurations below.
Yuxin