... connection with pipes 2.Different wall thickness,SCH5S-160 3.pushing, pressing, forging 4.low price,small volume ElbowPurpose ... /purpose can be divided into: the groove elbow, card sleeve elbow,double bearing the bend, flange elbow, reducer elbow, ... welded -Caps,Material of main partMaterial: carbon steel, stainless steel,alloy steel, Aluminum alloy and so on.carbon steel 's Material Grades: A403,WP304, ...