Specification 1.Alloy tool steel which offers good machineability. 2.Excellent polished finish. 3.Supplied in the hardened and tempered condition ready for maching. 4.In this condition it gives excellent wear resistance. Application 1.Plastic mould. 2.Casting dies and injection mould. 3.Shafts. Chemical composition Name C Si Mn P S Cr Mo P20 0.28-0.40 0.20-0.80 0.60-1.00 Â?¤0.030 Â?¤0.030 1.40-2.00 0.30-0.55 Similar grade Gb Aisi/astm Din Jis 4cr2mnmo P20 1.2311 Pds-3