5083 aluminum plate is an alloy made of magnesium and trace amounts of manganese and chromium. It is highly resistant to corrosion by seawater and industrial chemicals. 5083 alloy plate retains extraordinary strength after welding. It has the highest strength among non-heat-treatable alloys, but it is not recommended to be used at temperatures above 65 degrees Celsius.
Chemical Composition Specification
(Single values are maxima unless otherwise noted)
| Alloy | Fe | Cu | Mn | Mg | Cr | Si | Zn | Ti | Others (Each) | Others (Total) |
|---|---|---|---|---|---|---|---|---|---|---|
| 5083 | 0.40 | 0.40 | 0.10 | 4.0–4.9 / 0.40–1.0 | 0.05–0.25 | 0.25 | 0.15 | 0.05 | 0.05 | 0.15 |
Mechanical Properties Specification
(Single values are minima unless otherwise noted)
| Alloy–Temper | Specification | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50 mm) | Notes |
|---|---|---|---|---|---|
| 5083-O | ASTM B209M | 270–345 | 115–200 | 16 | |
| 5083-H32 | ASTM B209M | 305–385 | ≥215 | 12 | Also B928M |
| 5083-H116 | ASTM B928M | 305–385(1) | ≥215(1) | 10(2) | (1), (2) |
| 5083-H321 | ASTM B928M | 305–385(1) | ≥215(1) | 10–12(2) | (1), (2) |
Notes:
1.For H116 and H321 tempers, values are reduced for plate thicknesses over 40 mm:
Minimum tensile strength: 285 MPa
Minimum yield strength: 200 MPa
2.Elongation values for H116 and H321 vary slightly depending on gauge. Measurement gauge length also varies. Refer to ASTM B928M for detailed gauge-dependent values.
3.Properties for O and H32 tempers also vary slightly depending on sheet or plate thickness.
Typical Physical Properties of 5083 Aluminum Alloy
| Property | Value | Unit |
|---|---|---|
| Density | 2660 | kg/m³ |
| Elastic Modulus | 71 | GPa |
| Electrical Conductivity | 23.8 | MS/m at 20°C |
| Electrical Resistivity | 0.042 | µΩ·m (calculated) |
| Thermal Conductivity (equal vol) | 117 | W/m·K |
| Thermal Conductivity (equal mass) | 2660 | W/m·K (approximate) |
| Mean Coefficient of Thermal Expansion (20–100°C) | 17 | µm/m·°C |
International Grade Specification Comparison for 5083
| Alloy | ISO Name | UNS No. | DIN | BS (UK) | Common Name |
|---|---|---|---|---|---|
| 5083 | AlMg4.5Mn | A95083 | 3.3547 | N8 | AlMg4.5Mn |
Note: These comparisons are approximate only. Always consult original specifications if exact equivalents are required.
Possible Alternative Alloys to 5083
| Alternative Alloy | Reason for Selection Over 5083 |
|---|---|
| 3003 | For applications requiring a brighter appearance (e.g. tread plates); much lower strength. |
| 5005 | Suitable when a bright decorative anodizing finish is needed and lower strength is acceptable. |
| 5052 | Commonly used for tread plate applications; good corrosion resistance, slightly lower strength than 5083. |
Recommended Minimum Bend Radii for 5083 Aluminum Alloy
(Bending perpendicular to the rolling direction. Sheet or plate thickness = "t")
| Temper | 0.4 mm | 0.8 mm | 1.6 mm | 3.2 mm | 4.8 mm | 6.0 mm | 10 mm | 12 mm |
|---|---|---|---|---|---|---|---|---|
| O | 1t | 1t | 1t | 1t | 1t | 1t | 1t | 1t |
| H321 | 2t | 2t | 2t | 2t | 2t | 12t | ½t | ½t |
Note:
These values are recommended but not guaranteed.
Actual minimum bend radius will depend on:
Type of bending equipment
Tooling geometry and condition
Surface condition of the material
References
ASTM B209M-10 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
ASTM B928M-09 - Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service and Similar Environments
Bushfield, H. - Marine Aluminum Plate – ASTM Standard Specification B928 and the Events Leading to Its Adoption
Aluminum Association - Aluminum Standards and Data – 2009 Metric SI
WTIA Technical Note 2 - Successful Welding of Aluminium
