Carbon metal: ASTM/ASME A234 WPB,WPC Alloy metal: ASTM/ASME A234 WP one-WP twelve-WP 11-WP 22-WP 5-WP ninety one-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 Substantial general performance: ASTM/ASME A86... https://www.wilsonpipeline.com/product-category/stainlessduplex-steel-pipe.html