... tool steel flat bar Grade: SKD11, SKD61, etc. as customized Size: 20-800mm Length: 1~6m as customized with UT Article: SKD61, ... SKD11, Cr12Mo1V1, Tool steel flat bar Grade:SKD61, SKD11, Cr12Mo1V1 etc. as customizedSize: ... coal feeder, aviation, space flight, tool and new steel varieties required by national defense construction, defense production and national ...