Carbon metal: ASTM/ASME A234 WPB,WPC Alloy steel: ASTM/ASME A234 WP 1-WP twelve-WP eleven-WP 22-WP 5-WP 91-WP 911 Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H Reduced-temperature steel: ASTM/ASME A402 WPL three-WPL 6 Large effectiveness: ASTM/ASME A860 WPHY 42-46-fifty... https://www.wilsonpipeline.com/product-category/stainlessduplex-steel-pipe.html