The production process of 15B36Cr steel for chain rail link is introduced. Through reasonable composition de-sign,smelting process control,rolling heating and cooling process control,15B36Cr steel for chain rail link issuccessfully trial produced. The product quality analysis shows that the chemical composition,inclusion,decarburized layer,macro-structure,end hardenability value and grain size meet the requirements of the customer agreement. Among them,non-me-tallic inclusions are ≤1.5,hardenability is 50～56 HRC at J1.5 mm,40～52 HRC at J12 mm,≥30 HRC at J15 mm,ten-sile strength is 980～1053 MPa,yield strength is 950～1030 MPa,and user feedback is good.
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