Specification 1.One of the most often used chromium-molybdenum tool steels. 2.Contains a higher molybdenum content. 3.Better hot hardness and temper resistance. 4.High hot hardness and toughness. 5.Good resistance to softening, wear and thermal fatigue. Application 1.Applications such as gears. 2.Shear blades. 3.Mandrels punches and tooling dies. Chemical composition Name C Si Mn P S Cr Mo 1.2367 0.35-0.40 0.30-0.50 0.30-0.60 Max 0.035 Max 0.035 4.7-5.20 2.70-3.30 Similar grade Gb Aisi/astm Din Jis 4cr5mo2siv --- 1.2367 --- -