1. Introduce
– Martensitic precipitation hardening stainless steel containing about 15% Cr and 5% Ni
– Strengthened by the precipitation of about 3% Cu on the martensitic base
– Developed to improve strength, it is a high strength steel with a tensile strength of Min. 1310 and yield strength of Min. 1170 when heat treated at a precipitation hardening temperature of 482℃
– A modified version of 17-4PH that provides better toughness, ductility and forgeability compared to 17-4PH
– Excellent intergranular corrosion resistance after exposure to temperatures in the chromium carbide precipitation range of 427 to 816°C
– Resists oxidation up to 816°C and has better creep and stress fracture properties than SUS 304 and 304L
– Alloy developed for improved creep resistance and greater strength at temperatures above 537°C
– UNS S15500
* UNS
- Abbreviation for the Unified Numbering System for Metals and Alloys
- Unified unique numbering system for metals and alloys
- A representative number compatible with metals and alloys defined in several material-related codes, including ASTM, AISI, ASME, AWS, etc.
* S : Heat and corrosion resistant (stainless) steel
2. Property
– Strength, hardness, corrosion resistance, toughness, machinability, creep resistance, good welding and formability
| Element | Impact |
|---|---|
| Ni, Cr | Provides corrosion resistance |
| Cu | Provides excellent strength by precipitation hardening |
[15-5PH Chemical Composition (%)]
| C | Mn | P | S |
|---|---|---|---|
| Max. 0.07 | Max. 1.00 | Max. 0.040 | Max. 0.030 |
| Si | Cr | Ni | Cu |
|---|---|---|---|
| Max. 1.00 | 14.0~15.5 | 3.5~5.5 | 2.5~4.5 |
[15-5PH Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| Min. 1310 | Min. 1170 | Min. 8 |
[15-5PH Physical Properties]
| Density (g/㎤) | Melting Range (℃) | Specific Heat (0-100℃), J/kg*℃ |
|---|---|---|
| 7.8 | 1404~1440 | 460 |
3. Standard & Specification
– Specification : UNS S15500
| ASTM | A564, A705 |
| Product Form | AMS | ASTM |
|---|---|---|
| Bar, Rod, Forgings | 5659 | – |
| Plate, Sheet | 5862 | – |
| Wire | 5826 | – |
| Powder | – | A564 |
4. Available Form
– Bar, Rod
– Pipe, Tube
– Wire, Coil, Strip
– Sheet, Plate
– Powder
5. Application & Product
– Aerospace, Power Generation
| Applicaiton | Product |
|---|---|
| Aerospace | Engine parts, Structural parts, Landing gear |
| Power Generation | Gas turbine engine parts, Valves, Shafts |
(1) Engine parts / (2) Valves / (3) Shafts
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