One sample of bar stock from each heat shall be cut to a length of 6 in. (150 mm) and forged to a 5-in. by 2-in.-thick bar (125 mm by 50 mm). Samples shall be marked with longitudinal and transverse directions. Chemistry and physical properties in accordance with Table B1.1 shall be verified to ASTM A572/A572M Grade 50 (Grade 345) for both the longitudinal and transverse directions on each sample.
Magnetic particle testing shall be conducted on the initial 12 pieces from each run to verify tooling and forging procedures. Cracks shall not be permitted. If cracks are found, the tooling or forging procedure shall be modified, and an additional 12 initial pieces shall be tested. This process shall be repeated until 12 crack-free samples are obtained prior to production.
| Yield strength | 50 ksi (345 MPa) minimum |
| Tensile strength | 65 ksi (450 MPa) minimum |
| Elongation in 2 in. (50 mm) | 22% minimum |
| Reduction of area | 38% minimum |
| Charpy V-notch toughness | 20 ft-lb at 70° F (27 J at 21° C) |