Medium carbon steel gun nail is mainly composed of medium carbon steel and belongs to high strength medium carbon quenched and tempered steel. It has certain plasticity, toughness and strength, good machinability and good comprehensive mechanical properties after quenching and tempering.
 Normal: 425K, 428K, 432K, 438K
 Medium carbon steel: 410K, 413K, 416K, 419K, 438K
 High carbon steel: 410K, 413K, 416K