Metals & alloys · Ferrous alloys
HY-80 naval high-yield steel
A weldable Ni–Cr–Mo high-yield steel developed for submarine hulls and naval structures requiring toughness and strength under hydrostatic and dynamic loading.
Browse this family
More
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 | 0.18 | 0.15 | ||
| Ni | 2 | 3.25 | 2.5 | |
| 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 | ≥552 | MPa | 80 ksi class |
| Tensile strength | ~655–793 | MPa | Representative; verify product form and condition |
| Charpy toughness | specified | low-temperature qualification | |
| Weldability | qualified | hydrogen/preheat control | |
| 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
- Naval structures
- High-toughness weldments
Selection considerations
- Use the current governing standard and supplier certification for design or procurement.
Open in an analysis tool
04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| MIL-S | 16216 / legacy HY-80 specifications | verify procurement basis |
| Industry | HY-80 |
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.