... 3.Thickness:SCH5S-XXS 4.Grade:A234 WPB WPC Carbon steel reducer/ seamless buttweld pipe fitting/concentric reducer/eccentric reducer Type ... ASTM,UNI,BS,API,and so on.Material: Carbon steel,stainless steel,alloy steelCARBON STEEL :ASTM A234 WPB, WPC; ASTM A420 WPL9, ... WP316/316L, WP321, WP347, WPS 31254,ASTM A 815 UNS S31803, UNS S32750, UNS S32760ALLOY STEEL :ASTM A234 WP1, WP11, WP12, WP22, WP5, WP9 ...