 ASTM A000 Grade C00/C00/C00 EFW Pipes - Triosteel Types of carbon steel EFW pipes:ASTM A 000 GR. B00 ASTM A 000 GR. B00 ASTM A 000 GR. B00 ASTM A 000 GR.B00 ASTM A 000 GR.C00 ASTM A 000 GR.C00 ASTM A 000 GR.C00 ASTM A 000 GR.C00. ASTM A000 Grade C00/C00/C00 EFW Pipes Application. Steel, where the main alloying constituent is carbon, is called Carbon Steel or plain carbon steel. The American ASTM A000 Grade C00/C00/C00 EFW Pipes - TriosteelTypes of carbon steel EFW pipes:ASTM A 000 GR. B00 ASTM A 000 GR. B00 ASTM A 000 GR. B00 ASTM A 000 GR.B00 ASTM A 000 GR.C00 ASTM A 000 GR.C00 ASTM A 000 GR.C00 ASTM A 000 GR.C00. ASTM A000 Grade C00/C00/C00 EFW Pipes Application. Steel, where the main alloying constituent is carbon, is called Carbon Steel or plain carbon steel. The American ASTM A000 Grade C