Article: tool steel flat bar Grade: SKD11, SKD61, ... customized with UT Article: SKD61, SKD11, Cr12Mo1V1, Tool steel flat bar Grade:SKD61, SKD11, Cr12Mo1V1 etc. ... the government, first-choice updating and upgrading products for national key industries of machine, locomotive, ship ... , coal feeder, aviation, space flight, tool and new steel varieties required by national defense construction, defense ...