Iron Bone and Thin: The Five-High Mystery of China's Carbon Steel Thin Plates and the Way to Break Through the Wall

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Carbon steel plates

A cold-rolled carbon steel plate with a thickness of only 0.1 millimeters meanders along the intelligent production line of carbon steel, and the carbon steel plate eventually becomes the "steel coat" of the car body. This metal as thin as a sheet of paper bears the thickness and hardness of China's manufacturing industry, and also reflects the deep pain in the industrial transformation.

Depth of Thought: The Truth of the Carbon Steel Plate Industry under the Five-dimensional Lens

High Awareness: The Industrial Chain Game Behind Thickness

The carbon steel thin plate industry chain presents a "pressure on both ends" pattern: the upstream iron ore import dependence exceeds 80%, and the Australian and Pakistani giants control the pricing power. Downstream automotive and home appliance giants are squeezing their profit margins through centralized purchasing. Leading enterprises like Baosteel and Ansteel may seem prosperous on the surface, but in reality, their profit per ton of cold-rolled steel plates is only 200 to 300 yuan, making them mere "contract manufacturers" for international miners and terminal giants. When 60% to 70% of the cost of a steel plate is subject to fluctuations in overseas iron ore prices, the so-called "steel power" is nothing but a sandcastle.

High Perspective: The Steel Game in Geopolitics

Developed countries are reshaping the rules of the game through "green barriers". The EU's Carbon Border Adjustment Mechanism (CBAM) imposes a carbon tax of 50 euros per ton of steel, equivalent to 30% of the profits of Chinese steel mills. However, domestic enterprises are still obsessed with the capacity competition: in 2023, the overcapacity rate of cold-rolled carbon steel plates reached 25%. Behind the roar of Baosteel's 2800mm hot-rolling mill, the industry collectively fell into a death cycle of "expansion - overcapacity - loss".

High integration: The race against time for technological breakthroughs

● Material Gene Revolution: The 0.1mm ultra-thin plate developed by Baosteel has a strength of up to 1500MPa, which is 20% lighter than traditional products, yet it supports the lightweight revolution of new energy vehicles. The thickness accuracy of a steel plate reaches ±0.01mm, which is equivalent to 1/5 of a human hair. This is the reconstruction of the manufacturing industry with micron-level precision.

 ●The circular economy has broken through: The proportion of scrap steel in steelmaking has soared from 10% to 30%, reducing CO₂ emissions by 1.6 tons per ton. When Ansteel's laser welding technology increased material utilization by 15%, the steel giant began to learn to "calculate carefully".

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