Standard API | ASTM | BS | DIN | DNV | GB | ISO | JIS | KS | LR | NF | Others ASTM Standard Number A 268 (Seamless and Welded Ferritic Stainless Steel Tubing For General Service) Grade TP405 TP410 TP429 TP430 TP443 TP446-1 TP446-2 S40800 TP409 S41500 TP439 TP430Ti TPXM-27 XM-33 18Cr-2Mo 29-4 29-4-2 26-3-3 25-4-4 S44735 [ All grade ]