Special steel classification

China and Japan, the European Union's definition of special steel is relatively close, the special steel is divided into three categories of high-quality carbon steel, alloy steel, high alloy steel (alloying elements greater than 10%), of which alloy steel and high alloy steel account for special steel output 70%. The main steel grades are special carbon structural steel, carbon tool steel, carbon spring steel, alloy spring steel, alloy structural steel, ball bearing steel, alloy tool steel, high alloy tool steel, high speed tool steel, stainless steel, heat resistant steel. , as well as high-temperature alloys, precision alloys, electrothermal alloys, etc.

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