Low carbon steel (carbon content Wc < 0.25 percent), such as 08 steel, 10 steel, 15 steel, 20 steel, and 25 steel. If the parts require good plasticity, toughness, and good welding performance, such as building structures, containers, etc., should be selected low carbon steel.
Medium carbon steel (carbon content Wc = 0.25% to 0.60%), such as 30 steel, 35 steel, 40 steel, 45 steel, 50 steel, 55 steel, and 60 steel. If the parts that require strength, plasticity, and toughness are good, with comprehensive mechanical properties, such as shaft parts, should be used in carbon steel.
High carbon steel (carbon content Wc> 0.60%), such as 65 steel, 70 steel, 75 steel, 80 steel, 85 steel, T7 steel, T8 steel, T10 steel, and T12 steel. If the parts require high strength and hardness, good wear resistance, such as tools, etc., should be selected as high-carbon steel.
