... /2"--48" Material: carbon steel , stainless steel , alloy steel ASTM A234 WP22 Seamless Alloy Steel ElbowGood quality, good creditColor and ... DIN2616 DIN2617 JISB2311 JISB2312 JISB2313materialCarbon steel(ASTM A234WPB,,A234WPC,A420WPL6.,ect)Stainless steel(ASTM A403 WP304,304L,316,316L,321., ... ect)Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,ect)qualificationISO9001 ...