... ,St37-2,C45E,S355N,E235B,C45E4,E355DD.round barGRADE STANDARD GRADEGBJISASTMDINISOCARBONSTRUCTURALSTEELQ235SS4001020St37-2E235B20S20C1020C22EC20E425S25C1025C25EC25E435S35C1035C35EC35E445S45C1045C45EC45E450S50C1050C50EC50E450MnSWRCH50K1053CK50C50E455S55C1055C55EC55E460S60C1060C60EC60E4ALLOYSTRUCTURALSTEEL12CrNi3SNC815341515NiCr13 15CrMoSCM415411815CrMo513CrM04-520CrSCr420512020Cr420Cr420CrMnTo(Mo ...