This specification covers several grades of carbon and alloy steel seamless mechanical tubing.This specification covers both seamless hot-finished mechanical tubing and seamless cold-finished mechanical tubing in sizes up to and including 12 3⁄4 in. (323.8 mm) outside diameter for round tubes with wall thicknesses as required.The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square, rectangular, and special sections.
| Material | Grades |
|---|---|
| Standard Low-Carbon Steels | MT 1010 |
| MT 1015 | |
| MT X 1015 | |
| MT 1020 | |
| MT X 1020 | |
| Other Carbon and Alloy Steels | 1008 |
| 1010 | |
| 1012 | |
| 1015 | |
| 1016 | |
| 1017 | |
| 1018 | |
| 1019 | |
| 1020 | |
| 1021 | |
| 1022 | |
| 1025 | |
| 1026 | |
| 1030 | |
| 1035 | |
| 1040 | |
| 1045 | |
| 1050 | |
| 1518 | |
| 1524 | |
| 1541 | |
| Resulfurized or Rephosphorized, or Both, Carbon Steels | 1118 |
| 11L18 | |
| 1132 | |
| 1137 | |
| 1141 | |
| 1144 | |
| 1213 | |
| 12L14 | |
| 1215 |