15-5PH
Alloy 15-5 is a precipitation hardening alloy known for its high strength and hardness, combined with moderate corrosion resistance. It is a modified version of the older 17-4 alloy, specifically designed to offer improved toughness, particularly in the through-thickness (short transverse) direction. This makes Alloy 15-5 ideal for applications that demand high transverse strength and toughness, including engine parts, aircraft components, nuclear reactor components, and more.
Chemical Composition Limits
| Weight% | C | Si | Mn | P+S max | Cr | Ni | Cu | Cb | Fe | Mo |
| AMS 5659 15-5 | 0.07 | 1.0 | 1.0 | 0.03P 0.015S | 14.0-15.50 | 3.50-4.50 | 2.50-4.50 | 0.45 | Bal | 0.50 |
Mechanical Properties
| Material | Condition | Ultimate Tensile Strength (ksi) | 0.2 % Yield Strength (ksi) | Elongation % in 2D | % Reduction of Area | Rockwell C Hardness |
| Alloy 15-5 PH Bar AMS 5659 | Cond A | – | – | – | – | 363 HB max |
| Alloy 15-5 PH Bar AMS 5659 | H900 | 190 | 170 | 10 | 35 | 388-444 |
| Alloy 15-5 PH Bar AMS 5659 | H925 | 170 | 155 | 10 | 38 | 375-429 |
| Alloy 15-5 PH Bar AMS 5659 | H1025 | 155 | 145 | 12 | 45 | 331-401 |
| Alloy 15-5 PH Bar AMS 5659 | H1075 | 145 | 125 | 13 | 45 | 311-375 |
| Alloy 15-5 PH Bar AMS 5659 | H1100 | 140 | 115 | 14 | 45 | 302-363 |
| Alloy 15-5 PH Bar AMS 5659 | H1150 | 135 | 105 | 16 | 50 | 277-352 |
| Material | Condition | Ultimate Tensile Strength (ksi) | 0.2 % Yield Strength (ksi) | Elongation % in 2D | % Reduction of Area | Rockwell C Hardness |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | Cond A | – | – | – | – | 38 max |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | H900 | 190 | 170 | 5 | – | 40-47 |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | H925 | 170 | 155 | 5 | – | 38-45 |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | H1025 | 155 | 145 | 5 | – | 35-42 |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | H1075 | 145 | 125 | 5 | – | 33-39 |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | H1100 | 140 | 115 | 5 | – | 32-38 |
| Alloy 15-5 PH Sheet/Plate AMS 5862 | H1150 | 135 | 105 | 8 | – | 28-37 |