1.ASTM A213 seamless alloy steel tube 2.Standard:ASTM A213/ASME SA213 3.Grade:T2 T5 T11 ... 11-25mm; 2-4mm, OD: 10-65mm; 1-7mm3) Steel kind / steel grade: 15Cr, 20Cr, SCM 415H T5, T11, T22, ... T91 (P5, P11, P22, P91) Product name: ASTM A213 seamless alloy steel pipePlace of Origin: China Grade:T2 T5 T11 T12 ... .Protection: supply varnish coating, bevel end, plastic cap. ASTM A213 Alloy Seamless Steel Tube