Car half-shafts are made of 40Cr steel:
1. 40Cr is a Chinese national standard steel grade, and 40Cr steel is one of the most widely used steels in the machinery manufacturing industry;
2. After quality treatment, it has good comprehensive mechanical properties, good low-temperature impact toughness, and low notch sensitivity;
3. The steel has good quenching performance. Water quenching can be adjusted to 28-60mm, and oil quenching can be adjusted to 15-40mm. In addition to treatment, this steel is also suitable for cyanide and high-frequency quenching;
4. It has good machinability. When the hardness is 174-229HB, the relative machinability is 60%. This steel is suitable for making medium-sized plastic molds.
