15-5pH uamea uamea na mamanuina ina ia sili atu le malosi nai lo le 17-4 PH.O le u'amea 15-5 e martensitic i le fausaga i le tulaga fa'afefeteina ma e fa'amalosia atili e le fa'amama maualalo o le vevela o le vevela lea e fa'afefe ai se kopa o lo'o i ai le vaega i totonu o le u'amea.15-5 o loʻo taʻua foi o le XM-12 i nisi faʻamatalaga
| C | Cr | Ni | Si | Mn | P | S | Cu | Nb |
| ≤0.07 | 14.0-15.5 | 3.5-5.5 | ≤1.0 | ≤1.0 | ≤0.04 | ≤0.03 | 2.5-4.5 | 0.15-0.45 |
| Malosi | Fa'asalaina eletise | Mamafa fa'apitoa gafatia | Coefficient fa'alauteleina vevela |
| 7.8 | 0.98 | 460 | 10.8 |
| Tulaga | бb/N/mm2 | б0.2/N/mm2 | δ5/% | ψ | HRC | |
| Timuga | 480℃ tuai | 1310 | 1180 | 10 | 35 | ≥40 |
| 550℃ matua | 1070 | 1000 | 12 | 45 | ≥35 | |
| 580℃ matua | 1000 | 865 | 13 | 45 | ≥31 | |
| 620℃ tuai | 930 | 725 | 16 | 50 | ≥28 | |
AMS 5659, AMS 5862, ASTM-A564 (XM-12), BMS 7-240 (Boeing),W.Numera/EN 1.4545
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