Metals & alloys · Ferrous alloys
AerMet 100 ultra-high-strength steel
A secondary-hardening steel designed for exceptional fracture toughness at very high strength, used in landing gear, armour and demanding aerospace hardware.
More
01
Overview
- Material class
- Metals & alloys
- Category
- Ferrous alloys
- Family
- Ultra-High-Strength Steel
- Product forms
- Sheet/plate, Bar/rod
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| C | 0.21 | 0.25 | 0.23 | |
| Ni | 11 | 12 | 11.5 | |
| Co | 13 | 14 | 13.4 | |
| Cr | 3 | 3.5 | 3.1 | |
| Mo | 1.1 | 1.3 | 1.2 | |
| Fe | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 7.89 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 195 | GPa | Representative; verify product form and condition |
| Yield strength | ~1720 | MPa | aged |
| Tensile strength | ~1930 | MPa | aged |
| Fracture toughness | ~110–125 | MPa√m | representative |
| Hardness | 53–55 | HRC | aged |
Conditions
Representative supplied condition
Condition not fully specified in the source record.
03
Processing and use
Processing
- Double vacuum melting and strict inclusion control are commonly specified.
- Heat treatment includes austenitizing, cryogenic treatment and ageing.
Applications
- Aircraft landing gear
- Arresting hooks
- Armour components
- High-duty shafts
Selection considerations
- Use design allowables tied to melt route and product form.
- Cadmium alternatives and hydrogen control matter during plating and overhaul.
Open in an analysis tool
04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| UNS | K92580 | |
| AMS | 6532 | |
| Carpenter | AerMet 100 | trade designation |
05
Sources and context
Sources
- Carpenter AerMet 100 data sheetExisting reference
- NASA materials selection resourcesApplication reference
- NASA aerospace materials characteristics overviewApplication reference
- U.S. Department of Energy lightweight materials programApplication reference
- U.S. Department of Energy critical materials programStrategic reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Limited qualified producers and long aerospace qualification cycles.
High-value closed-loop scrap and component life extension are important due to cobalt and nickel intensity.
Strategic context
Combines ultra-high strength with fracture toughness for safety-critical aerospace structures.
Critical inputs: Nickel, Cobalt, Molybdenum
Basis: EU Critical Raw Materials Act (2024); USGS 2025 Critical Minerals List