... ,4Cr5MoSiV,high hardenability, high toughness, and fine-grained. Fine-grained high-quality hot alloy steel,4Cr5MoSiV,high hardenability, high toughness, ... characteristics The features of composition designhigh hardenability, high toughness, and fine-grained.The use of Electric ... ESRmake the production of die steel are in high purity and good performance.Anneal860-890 Hardness≤229HBWTemperature for ...