Metals & alloys · Aluminium alloys
5083-H116/H321 marine aluminium
A non-heat-treatable Al–Mg–Mn alloy selected for welded marine structures, cryogenic vessels and transport equipment requiring strength and seawater corrosion resistance.
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01
Overview
- Material class
- Metals & alloys
- Category
- Aluminium alloys
- Family
- 5xxx Aluminium Alloy
- Product forms
- Sheet/plate, Bar/rod, Casting
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Mg | 4 | 4.9 | 4.5 | |
| Mn | 0.4 | 1 | 0.7 | |
| Cr | 0.05 | 0.25 | 0.15 | |
| Fe | 0.4 | 0.2 | ||
| Si | 0.4 | 0.2 | ||
| Al | Balance |
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Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 2.66 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 71 | GPa | Representative; verify product form and condition |
| Yield strength | ~215 | MPa | H116 plate |
| Tensile strength | ~305 | MPa | H116 plate |
| Elongation | 10–16 | % | Representative; verify product form and condition |
| Weldability | excellent | qualified procedure |
Conditions
H116
Marine-service strain-hardened condition.
H321
Stabilized strain-hardened marine condition.
03
Processing and use
Processing
- Product form, thermal history and manufacturing route materially affect performance.
Applications
- Ship structures
- LNG tanks
- Rail and road transport
Selection considerations
- Avoid prolonged exposure in sensitization-prone temperature ranges.
- Marine temper and corrosion testing matter for plate procurement.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| AA | 5083-H116/H321 | |
| UNS | A95083 | |
| ASTM | B928 | marine plate |
05
Sources and context
Sources
- ASTM B928 marine aluminium plateExisting reference
- The Aluminum Association 5xxx alloy guidanceExisting 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.