AM-355-SCT850 Plate: MIL-HDBK-5J Design Allowables
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| Material class | Steel |
| Alloy / temper / form | AM-355 / SCT850 / Plate |
| Specifications | AMS 5549 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 2.6.2.0, Table 2.6.2.0(d) (pdf page 124 of the chapter file) |
| Dimension bands | 3 |
| Density | 0.282 lb/in3 |
Design Mechanical and Physical Properties (room temperature)
As printed in the handbook table. Bases: A and B are statistical minimums (99 % and 90 % probability at 95 % confidence), S the specification minimum. Grain directions: L longitudinal, LT long transverse, ST short transverse.
| Dimension band | 0.000–0.375 in | 0.375–1.000 in | 1– in | |
|---|---|---|---|---|
| Specification | AMS 5549 | AMS 5549 | AMS 5549 | |
| Basis | S | S | S | |
| Ftu, ksi | L | 188 | 188 | 188 |
| LT | 190 | 190 | 190 | |
| Fty, ksi | L | 162 | 162 | 162 |
| LT | 165 | 150 | 150 | |
| Fcy, ksi | L | 180 | 180 | 180 |
| LT | … | … | … | |
| Fsu, ksi | L | 124 | 124 | 124 |
| LT | 124 | 124 | 124 | |
| Fbru (e/D = 2.0), ksi | L | 383 | 383 | 383 |
| LT | 383 | 383 | 383 | |
| Fbry (e/D = 2.0), ksi | L | 278 | 278 | 278 |
| LT | 278 | 278 | 278 | |
| e, % | L | … | … | … |
| LT | 10 | 10 | 10 | |
| E, Msi | 29 | 29 | 29 | |
| Ec, Msi | 29 | 29 | 29 | |
| G, Msi | 11 | 11 | 11 | |
| ν | 0.32 | 0.32 | 0.32 | |
| ρ, lb/in3 | 0.282 | 0.282 | 0.282 | |
Effect of Temperature
Percent of the room-temperature value against temperature, digitized from the handbook figures (the shortest exposure of each figure, every 10 °F). Strength curves give the allowable at temperature; "after exposure" curves give the room-temperature property after a soak at that temperature.
Strength allowables at temperature, percent of room temperature
Moduli at temperature
| °F | F_su |
|---|---|
| 100 | 94.3 |
| 200 | 84.9 |
| 300 | 81.7 |
| 400 | 79.9 |
| 500 | 78.1 |
| 600 | 76.3 |
| 700 | 74.6 |
| 800 | 72.8 |
Factors in percent of the room-temperature allowable.
Other AM-355 Tables
- AM-355-SCT 1000 Plate (Table 2.6.2.0(d))
- AM-355-SCT1000 Bar and forging (Table 2.6.2.0(c))
- AM-355-SCT1000 Sheet and strip (Table 2.6.2.0(c))
- AM-355-SCT850 Bar and forging (Table 2.6.2.0(c))
- AM-355-SCT850 Sheet and strip (Table 2.6.2.0(c))
Source and Use
U.S. Department of Defense (2003). Metallic Materials and Elements for Aerospace Vehicle Structures. MIL-HDBK-5J, 31 January 2003 (public domain). The values are the handbook's design allowables as extracted from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ. No warranty is given.