blast furnace tapping drill rod Excellent quality,competitve price with Promptly delivery! High furnace tapping drill rodExcellent quality,competitve price with best service.Product NameHigh furnace steel BrandXR(by our own factory)Material/Grade1)DIN CK45,JIS S45C,SAE1045,AISI1045;2)DIN CK20,JIS S20C,SAE1020,AISI1020,ASTM A106B,ASTM A53B,ST45,ST42.SizeOutdiameter:38mm(1.496"),40mm(1.575") ...