What is AMS 5659 material?
AMS 5659 is a specification for 15-5 PH (precipitation-hardening) martensitic stainless steel, available in bar, wire, forgings, and rings. Compared to 17-4 PH stainless steel, it offers higher strength, excellent corrosion resistance, and superior transverse toughness, and is commonly used in aerospace and high-performance, high-temperature (up to 600°F) applications.
What is AMS 5659 15-5PH Round Bars?
AMS 5659 15-5PH round bars are a high-strength, precipitation-hardening martensitic stainless steel (UNS S15500) specification, commonly used in aerospace and high-performance engineering for components requiring excellent corrosion resistance, high tensile strength, and toughness. It offers better transverse ductility and toughness than 17-4 PH due to its refined, low-ferrite microstructure.
If you are looking for high-strength, corrosion-resistant stainless steel solutions for aerospace, precision engineering, or mechanical applications, we offer AMS 5659 15-5PH stainless steel round bars with consistent quality and reliable global delivery.
Our AMS 5659 15-5PH round bars are manufactured using processes such as vacuum induction melting, forging, precision rolling, solution annealing, and age hardening, ensuring a uniform microstructure, refined grain size, and controlled mechanical properties. Typical tensile strength ranges from 1100 to 1400 MPa, with elongation of approximately 10-15%, and hardness up to HRC 28-38, depending on heat treatment conditions. Product forms include hot-rolled or forged round bars, precision turned bars, and custom lengths, which can be tailored to meet stringent engineering and manufacturing specifications.
AMS 5659 15-5PH round bar specifications
| Diameter (mm) | Diameter (inch) | Standard Length (mm) | Surface Finish | Heat Treatment / Condition | Notes / Applications |
|---|---|---|---|---|---|
| 3 – 6 | 0.118 – 0.236 | 1,000 – 2,500 | Bright / Polished | Solution Treated / H900 / H1025 | Precision pins, small springs |
| 6 – 10 | 0.236 – 0.394 | 2,000 – 3,000 | Bright / Polished | Solution Treated / H900 / H1025 | Small shafts, fasteners |
| 10 – 20 | 0.394 – 0.787 | 2,000 – 3,000 | Bright / Polished | Solution Treated / H900 / H1025 | Springs, actuators, aerospace components |
| 20 – 50 | 0.787 – 1.968 | 3,000 – 4,000 | Bright / Polished | Solution Treated / H900 / H1025 | Structural shafts, high-load fasteners |
| 50 – 120 | 1.968 – 4.724 | 3,000 – 6,000 | Bright / Polished | Solution Treated / H900 / H1025 | Large industrial shafts, aerospace applications |
AMS 5659 15-5PH 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 | 3.50-5.50 | 2.50-4.50 | 0.45 | Bal | 0.50 |
AMS 5659 15-5PH 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 |
AMS 5659 15-5PH Heat treatment
| 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 |
We ensure product quality through comprehensive process control, including chemical composition verification, mechanical property testing, dimensional inspection, microstructure examination, and optional non-destructive testing (ultrasonic or magnetic particle testing). AMS 5659 material certification is provided for every batch, and third-party inspection is available upon request.
With established export experience in Europe, North America, and Asia, AMS 5659 15-5PH round bars are widely used in aerospace components, high-performance shafts, valve parts, precision instruments, chemical and petrochemical equipment, and automotive engineering – applications where strength, reliability, and corrosion resistance are critical.
