F1554 Mechanical Properties
| Grade |
Marking |
Size inches |
Tensile, ksi |
Yield, ksi min |
Yield, MPa min |
Elong. % min |
RA % min |
| 36 |
 |
1⁄2 - 4 |
58 - 80 |
36 |
248 |
23 |
40 |
| 55 |
 |
1⁄2 - 2 |
75 - 95 |
55 |
380 |
21 |
30 |
| 21⁄4 - 21⁄2 |
75 - 95 |
55 |
380 |
21 |
30 |
| 23⁄4 - 3 |
75 - 95 |
55 |
380 |
21 |
30 |
| 31⁄4 - 4 |
75 - 95 |
55 |
380 |
21 |
30 |
| 105 |
 |
1⁄2 - 3 |
125 - 150 |
105 |
724 |
15 |
45 |
- Stamping of F1554 bolts with manufacturer's identification is a supplemental requirement (S2)
- Color coding is required unless the grade is stamped in accordance with supplemental requirement (S3).
- When Grade 36 is specified, a weldable Grade 55 may be furnished at the supplier's option.
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