Metals & alloys · Ferrous alloys
HY-100 naval high-yield steel
A higher-strength member of the HY naval steel family used for submarine and naval structures requiring 100 ksi-class yield strength with controlled weldability and toughness.
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01
Overview
- Material class
- Metals & alloys
- Category
- Ferrous alloys
- Family
- Naval High-Strength Steel
- Product forms
- Not specified
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| C | 0.2 | 0.16 | ||
| Ni | 2.25 | 3.5 | 2.8 | |
| Cr | 1 | 1.8 | 1.4 | |
| Mo | 0.2 | 0.6 | 0.4 | |
| Mn | 0.1 | 0.4 | 0.25 | |
| Fe | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 7.85 | g/cm³ | Representative; verify product form and condition |
| Yield strength | ≥690 | MPa | 100 ksi class |
| Tensile strength | ~760–900 | MPa | Representative; verify product form and condition |
| Fracture toughness | qualified | thickness/temperature dependent | |
| Weldability | strictly controlled | preheat/filler/heat input | |
| Service role | pressure hull / naval structure | specification dependent |
Conditions
Representative supplied condition
Condition not fully specified in the source record.
03
Processing and use
Processing
- Product form, thermal history and manufacturing route materially affect performance.
Applications
- Submarine pressure hulls
- High-strength naval structures
Selection considerations
- Use the current governing standard and supplier certification for design or procurement.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| Military/naval | HY-100 | current procurement specification required |
05
Sources and context
Sources
- US Navy HY-series steel public technical literatureExisting reference
- ASM International and public alloy designation referencesIdentity reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Availability and lead time depend on grade, product form, certification and regional supply chain.
Segregated recovery and closed-loop recycling improve material efficiency where practical.