ELBOW size:1/2"-80" material: carbon standards:ASTM,JIS,DIN,GB 1. Name: Carbon seamless elbow2. Standards: AMSE,JIS,DIN,GB124593. Size ... : 1/2''- 80''4. Material: carbon steel:20#,A3,Q235 A,20G,16Mn,ASTM A105,etc ... to customers' requirement13. The large order quatity,the lower price. carbon seamless elbow