| Specification | AMS 4118 and AMS-QQ-A-225/5 |
| Form | Bar and rod; rolled, drawn, or cold-finished |
| Temper | T4, T451, T42a |
| Cross-Sectional Area, in.2 | ≤50 |
| Thickness or Diameter, in. | ≤8.000 |
| Basis | S |
| Mechanical Properties: | |
| Ftu, ksi: | |
| L | 55 |
| LT | … |
| Fty, ksi: | |
| L | 32 |
| LT | … |
| Fcy, ksi: | |
| L | 32b |
| LT | … |
| Fsu, ksi | 33 |
| Fbru, ksi: | |
| (e/D = 1.5) | 83 |
| (e/D = 2.0) | 105 |
| Fbry, ksi: | |
| (e/D = 1.5) | 45 |
| (e/D = 2.0) | 51 |
| e, percent (S-basis): | |
| L | 12 |
| E, 103 ksi | 10.4 |
| Ec, 103 ksi | 10.6 |
| G, 103 ksi | 3.95 |
| μ | 0.33 |
| Physical Properties: | |
| ω, lb/in.3 | 0.101 |
| C, Btu/(lb)(°F) | 0.23 (at 212°F) |
| K, Btu/[(hr)(ft2)(°F)/ft] | 78 (at 77°F) |
| α, 10-6 in./in./°F | See Figure 3.2.2.0 |
- a Design allowables were based upon data obtained from testing T4 material and from testing samples of bar and rod, supplied in the O or F temper, which were heat treated to T42 temper to demonstrate response to heat treatment by suppliers.
- b For the stress-relieved temper T451, the value may be somewhat lower.