347AP

<Features>
(a) Excellent polythionic acid SCC resistance without PWHT (post-weld heat treatment)
(b) Equivalent weldability to Type304 and superior one to Type347
(c) Equivalent high-temperature strength to type347

<Equivalent steel grade, chemical compositions>

• ASTM S34751, ASME Code Case 2196
• 18Cr-10Ni-0.3Nb