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15-7PH Stainless Steel Disk
Available Configurations
Properties common to all products in this list
Key Features
15-7PH Stainless Steel Disk (UNS S15700) is a precision-cut circular component in a semi-austenitic precipitation-hardening stainless steel that combines high tensile strength, excellent fatigue resistance, and good corrosion resistance in a ready-to-use geometry:
High Tensile Strength After Conditioning (exceeding 1500 MPa)
Following appropriate conditioning and aging treatments, 15-7PH Disk achieves tensile strengths exceeding 1500 MPa while retaining the corrosion resistance characteristic of the chromium-nickel-molybdenum alloy system.
Heat-Treatable for Tailored Mechanical Properties
The heat-treatable nature of 15-7PH allows mechanical properties to be tailored to specific load and fatigue requirements, making it possible to optimize strength and ductility for individual aerospace and precision instrumentation applications.
Excellent Fatigue Resistance
Excellent fatigue resistance suits 15-7PH Disk to spring and diaphragm elements in precision instrumentation and rotational parts in high-performance mechanical devices subjected to sustained cyclic loading.
Good Corrosion Resistance
Good corrosion resistance is maintained even after precipitation hardening, supporting reliable performance in aerospace actuator components and instrumentation exposed to moderately aggressive service environments.
Precision-Cut Ready-to-Use Geometry
Supplied as a precision-cut circular component, 15-7PH Disk provides dimensional consistency for direct integration into precision instrumentation, actuator assemblies, and mechanical devices without further machining.
Industrial Applications
15-7PH Stainless Steel Disk is used across aerospace, precision instrumentation, and high-performance mechanical sectors where high strength and fatigue resistance must be combined in a precision circular geometry:
- ✦ Aerospace Actuator Components
- Used in aerospace actuator components where tensile strength exceeding 1500 MPa after conditioning and aging, combined with excellent fatigue resistance, ensures reliable performance under the repeated cyclic loading characteristic of actuator mechanisms.
- ✦ Spring & Diaphragm Elements in Precision Instrumentation
- Formed into spring and diaphragm elements for precision instrumentation, where the heat-treatable nature of 15-7PH allows mechanical properties to be tailored to specific load and fatigue requirements of the instrument design.
- ✦ Rotational Parts in High-Performance Mechanical Devices
- Machined into rotational parts for high-performance mechanical devices, where high tensile strength and fatigue resistance support reliable operation under the combined mechanical and cyclic loads typical of rotating assemblies.
- ✦ Precipitation-Hardening & Fatigue Research
- Serves as standardised test specimens for precipitation-hardening kinetics, fatigue crack initiation studies, and stress-corrosion cracking evaluation in high-strength stainless alloy systems, where the precision disk geometry supports reproducible experimental conditions.
Material Properties
| Element | Value |
|---|---|
| Elongation at break( % ) | <30 |
| Tensile strength( MPa ) | 1020 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 80 |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.81 |
| Element | Value |
|---|---|
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 14.4@20-90°C |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Diameter | ±0.5mm |