Stainless Steel: ASTM A403 Wp 304/304L/304 H/316/ 316 L/321/310/347/904L etc.

Carbon Steel: ASTM A234 WPB/A420 WPL3/A420 WPL6/MSS-SP-75  WPHY42/46/52/56/ 60/65/70

Alloy Steel: ASTM A234 Wp1/WP5/ Wp9/ Wp11/Wp22/WP91 etc.