Molybdenum mandrels Additional composition: Ti:(1.0~2.0)， Zr:(0.1~0.5)， C: (0.1~0.5) and other trace element. Chemical composition: This product is made of molybdenum powder FMo-1 with the addition of trace element. The surface have no defects, such as superfusion, blister, divided layer, crackle,etc. Density：>=9.3g/cm3 Main applications: Mainly used for piercing steel tubes, such as stainless steel tubes, high-temperature alloy steel and seamless steel tube, etc. Luoyang keyou nonferrous metal Material Co.,LTD. According to the standard of GB4366-84.