| Grade Marking | Specification | Material and Treatment | Nominal Size (In.) | Mechanical Properties | Hardness Rockwell | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Proof Load Min (ksi) |
Yield Strength Min (ksi) |
Tensile Strength Min (ksi) |
Elong % Min [9] | RA % Min [10] | Min | Max | ||||
 |
A490 Type 1 |
Medium Carbon Alloy Steel, Q & T |
1⁄2” – 11⁄2“ | 120 | 130 | 150 min 173 max |
14 | 40 | C33 | C38 |
 |
A354 Grade BD [6] |
Medium Carbon Alloy Steel, Q & T |
All Sizes | – | 130 | 150-173 | 14 | 40 | C33 | C38 |