... of the commonlyused seamless elbow forming technology are hot pushing, stamping, extrusion etc.According to the different ... the bend, flange elbow, reducer elbow, tooth bend, stamping elbow inside andoutside screw, pushing elbow, socket elbow ,butt ... -Caps,Material of main partMaterial: carbon steel, stainless steel,alloy steel, Aluminum alloy and so on.carbon steel 's Material Grades: A403,WP304, ...