easy slag removal, smooth bead, excellent appearance.
Excellent performance, stable arc, and high efficiency
Specializing in the research, development and production of consumables for automatic submerged arc welding flux.
With strong alloying ability and flexible design, this flux allows alloy powders, ferroalloys, stabilizers, and other additives to be readily incorporated for precise control over weld composition and mechanical properties. It delivers excellent low-temperature impact toughness for high-strength and low-temperature steels, while its low to ultra-low hydrogen content ensures good cold cracking resistance.
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High particle strength, low dust. The dense, hard, glassy structure resists breakage during welding, recycling, and handling, producing minimal fines. Dense slag and thermal expansion differences help the slag crust lift and peel off in large pieces after cooling, making slag removal easy for automated welding lines.
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Excellent protection and quality. During welding, the welding wire and flux work together to form a layer of slag above the arc zone, effectively isolating the air, preventing oxidation and gas inclusions, and achieving high-quality welds. Submerged arc welding also enables high-speed, continuous welding for long straight seams and automated production.
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Continuous wire feeding delivers ultra-high welding efficiency and eliminates frequent electrode changes. Stable feeding gives much higher deposition efficiency than manual stick welding, making it ideal for automated and robotic welding. Shielding gas options such as pure Ar, Ar+CO2, or pure CO2 help optimize droplet transfer and welding performance for thin, medium, and thick plates.
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Exceptional weld quality under inert gas shielding. The wire composition suffers minimal burn-off, effectively blocking air to produce clean, dense welds for reactive metals like aluminum, magnesium, and titanium. The process is clean and aesthetic, with extremely stable welding, virtually no spatter, and smooth weld beads that reduce post-weld grinding or cleaning.
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From raw materials to finished products, every step is strictly controlled to ensure consistent quality.
A high-precision automated batching system ensures exact proportioning of mineral raw materials and alloy powders. All materials undergo crushing and screening to achieve uniform particle size and consistent composition, laying a solid foundation for high-quality flux.
Dry powders are first forced-mixed to achieve preliminary uniform distribution. A highly reactive inorganic binder is then introduced for wet mixing, forming a plastic, homogeneous blend that ensures micro-level consistency and enhances metallurgical stability.
The homogenized wet mixture is processed through specialized granulation equipment, where controlled tumbling produces spherical or near-spherical wet granules. Precise particle size and regular morphology ensure uniform sintering and superior flowability.
Wet granules are first naturally cured at ambient temperature, then conveyed into a multi-layer mesh belt dryer for gradual moisture removal under low-temperature conditions. This gentle, precisely controlled process prevents cracking and ensures low moisture absorption.
Dried granules enter a high-temperature sintering furnace to complete the solid-phase sintering reaction within a precisely controlled temperature zone. Stable mineral phase structures form inside the granules, significantly enhancing hardness and compressive strength.
Strict sampling is conducted every two hours throughout production. Key parameters—particle size, compressive strength, chemical composition, moisture, and flowability—are systematically tested. Real-time data analysis and process traceability ensure every batch meets specifications.
With over 27 years of expertise in submerged arc welding consumables.
Ph.D. and master's degree holders leading continuous innovation.
ISO 9001, ISO 14001, ISO 45001, CCS, and CE certified, with rigorous quality control.
Complete range of sintered flux, fused flux, and welding wires.
OEM/ODM services tailored to your specifications.
Widely used in steel structures, shipbuilding, boilers, bridges.
Factory-direct pricing without middleman markup.
Quick quotation and sample delivery within days.
From initial inquiry to after-sales service
Gongyi Yulin Welding Materials Co., Ltd. was established in 2003 in Gongyi City, Henan Province. We specialize in R&D and production of submerged arc welding materials, including welding wires and fluxes, and are recognized as a provincial and municipal high-tech enterprise.
Our factory covers over 120 mu with 110 employees and a strong R&D team. We operate advanced production lines with full in-house welding, chemical, and testing laboratories. Our quality system is certified to ISO9001, ISO14001, ISO45001, CCS, and CE standards.
Our "Yulin" brand offers a complete range of sintered fluxes, fused fluxes, and submerged arc welding wires. Our products are widely used in steel structures, spiral and straight-seam pipes, power station boilers, pressure vessels, chemical machinery, shipbuilding, locomotives, railway bridges, and roll surfacing. Our products are highly regarded both domestically and internationally.
We are committed to quality, innovation, and customer satisfaction. New and existing customers are always welcome to visit our factory.
A manufacturing base built for stable SAW flux and wire supply, supported by certified quality systems, in-house laboratories, and experienced technical teams.
Wanghe Village, Dayugou Town, Gongyi City, Zhengzhou City, Henan Province, China
ylflux@163.com
+86 133 3385 7613
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