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Against the backdrop of the booming global new energy industry and the increasingly sophisticated lithium battery manufacturing in 2026, 304 stainless steel plates have emerged as the most widely used basic material in lithium battery production lines, thanks to their four core advantages: non-magnetism, corrosion resistance, high cleanliness and cost-effectiveness. They represent the optimal solution balancing process requirements and cost control. 1. Non-magnetism: A Core Safety Barrier The production of lithium batteries strictly prevents metal foreign matters. Magnetic components tend to adsorb iron powder particles, which may cause cell short circuits and thermal runaway. As an austenitic material, 304 stainless steel features extremely low magnetic permeability in the solution-annealed state, exhibiting non-magnetic or weak magnetic properties that avoid the risk of foreign matter adsorption. Its performance meets the micron-level foreign matter control standards of the lithium battery industry. Although its corrosion resistance is inferior to that of 316L, there is no need for additional investment in non-extreme environments. 2. Cost: A Key Consideration for Large-scale Mass Production The lithium battery industry entered the era of meager profits and large-scale manufacturing in 2026, with the investment scale of production line equipment being enormous. 304 stainless steel does not contain molybdenum and is 30% to 50% cheaper than 316L. For non-strong corrosion contact components such as dry room walls and frames, 304 stainless steel is fully applicable, which can significantly reduce equipment investment. According to estimates, a reasonable combination of 304 and 316L in a 10GWh production line can save tens of millions of yuan in material costs. 3. Cleanliness and Processability: Adapting to Harsh Production Environments Lithium battery production must be carried out in low-dew-point dry rooms and cleanrooms. 304 stainless steel has a smooth surface that can be polished to high precision, is not prone to dust accumulation and is easy to clean. Meanwhile, it boasts excellent cold working formability, which is not easy to crack during bending, welding and other processes. The weld seams can restore corrosion resistance after pickling and passivation, meeting the assembly requirements of high-precision equipment such as coaters and calenders. 4. Refined Application Classification The application of 304 stainless steel has clear boundaries: 316L is required for core strong corrosion areas (liquid injectors, electrolyte storage tanks, etc.); the slurry contact area can adopt 304 base material coated with ceramics or Teflon; environmental components such as dry room wall panels and turnover carts are the main application scenarios of 304 stainless steel, with a service life of more than 10 years. In conclusion, 304 stainless steel is not the material with the best performance, but it offers the highest cost-effectiveness under the specific working conditions of lithium battery production lines. Even with the iteration of solid-state battery technology, its mature supply chain and stable performance will continue to serve as the basic material of the new energy industry for a long time. It is worth mentioning that choosing HUA STEEL can provide you with high-quality stainless steel raw materials suitable for lithium battery production lines. The 304 stainless steel plates supplied by HUA STEEL strictly comply with domestic and foreign standards such as GB/T 3280-2015 and ASTM A240, control impurities through AOD refining process, can achieve high-precision surface polishing, have precise thickness tolerance, and are equipped with a complete testing system, providing original material reports to ensure that the products meet the strict requirements of non-magnetism and high cleanliness in the lithium battery industry. Relying on a mature supply chain and flexible production capacity, HUA STEEL can provide customized supply solutions according to the large-scale production needs of enterprises, helping lithium battery enterprises control costs while ensuring the safe and stable operation of production lines, and providing reliable material support for the development of the new energy industry.