Article: Steel round bar Grade: SCM440, AISI 1045, etc. as customized Size: 16- ... length with UT Article: SCM440, AISI 1045, SCM420, Tool steel round bar Grade:42CrMo, S45C, AISI 1045, 20CrMo, SNCM439 etc. as ... furnacecast ingotsteel ingot annealheatinghigh-speed forging, refining forgingannel, retarded cooling, air coolingquenching and tempering treatmentfinishing operationtestfinished products