4130 alloy tube standard:astm a335 grade:P1, P2, P5, P9, P11, P12, P21, P22, P91, P92 4130 alloy tubeStandard: ASTM A335Steel Gr.: P1 ... , P91, P92Usage: High temperature service 1/ Product name ASTM A335 alloy steel pipe2/ Standard ASTM SA213, SA335, A369, A209, A250, G3462 ... QUALITY, COMPETIIVE PRICE, EXCELLENT SERVICE ARE YOUR BEST CHOICE 4130 alloy tube