D3 Alloy Steel Round Bar 1, Round/Plate/Square bar in ful size 2, Hardness: HRC=60, HBS<=370 3, ... 2008 certificated D3 Alloy Steel Round Bar1, Round/Plate/Square bar in ful size2, Hardness: HRC=60, HBS<=370 3, ISO ... MachineInspection EquipmentsDirect-reading SpectrometerSclerometerSupersonic Crack Detector D3 Alloy Steel Round Bar