... ring 1,material:alloy steel,carbon steel, stainless steel 2,professional UT 3,all kind of types Forged Flange ... :15#,20#,25#,30#.35#,40#,45#,46#, alloy steel,carbon steel, stainless steel etc or according to customers' different requirements. 3,Dimension Standard: ... . 6, Small Orders Accepted 7, Professional engineers 8, Prompt Delivery (alloy steel,carbon steel ,stainess steel)forged flange ring