... as customized with UT Article: SKD61, SKD11, Cr12Mo1V1, Tool steel flat bar Grade:SKD61, SKD11, Cr12Mo1V1 etc. ... power, automobile, coal feeder, aviation, space flight, tool and new steel varieties required by national defense construction, ... annealheatinghigh-speed forging, refining forgingannel, retarded cooling, air coolingquenching and tempering treatmentfinishing operationtestfinished products