... machine. 1. Description: Roller and mould, welded pipe roller, stainless steel pipe mould for round/square/shaped tube.2. Pipe mould ... raw material. We choose hign-quality tool steel Cr12mov as raw materials, mouild steel Cr12mov material set high wear resistance, toughness ... mechanical pattern, on the corner, concave angle phenomena, and to form tolerance of roundness in les than 0.05mm, square tube ...