hot work tool steel/round bar Forging material Annealing,Hardness:180~255HBS,EAF or ESR black surface,milled peeled surface HOT WORK TOOL STEEL /ROUND BARH13/DIN1.2344 hot work mould steel feature:1)Comparable steel:H13(USA,ASTM);DHA1(Datong,Japan);4Cr5MoSiV1(China);1.2344(Germany DIN);SKD61(Japan,JIS)2) Chemical composition:C Si MnCr P SMoV0.30~0.400.80~1.200.20~0.404.75~5.50≤0.025≤0.0251.25~1. ...