Mechanical Properties

The following limits are given according to EN 485-2 standard. Tensile testing performed according to EN 10002-1 standard.

When materials are specified for marine use, and when applicable, they are supplied according to ASTM B928, ASTM B209 standards or upon request to ABS, Bureau Veritas, Det Norske Veritas, Lloyd's Register, RINA and other rules.

Alloy Temper Thickness
mm
Rm
MPa
Rp0,2
MPa
Elongation, min.
%
Bend radius Hardness
HBW (1)
Over Up to Min. Max. Min. Max. A50 A 180° 90°
EN AW-
5083
O
H111
≥ 1,5 3,0 275 350 125   13   1,5 t 1,0 t 75
3,0 6,0 275 350 125   15     1,5 t 75
6,0 12,5 275 350 125   16     2,5 t 75
12,5 70,0 275 350 125     15     75
H112 ≥ 8,1 12,5 275   125   12       75
12,5 40,0 275   125     10     75
40,0 70,0 275   115     10     73
H116
H321
≥ 1,5 3,0 305   215   8   3,0 t 2,0 t 89
3,0 6,0 305   215   10     2,5 t 89
6,0 12,5 305   215   12     4,0 t 89
H128 >3 8 305 385 215   10     2,5 t 89
EN AW-
5086
O
H111
≥ 1,5 3,0 240 310 100   13   1,0 t 1,0 t 65
3,0 6,0 240 310 100   15   1,5 t 1,5 t 65
6,0 12,5 240 310 100   17     2,5 t 65
12,5 70,0 240 310 100     16     65
H112 ≥ 8,1 12,5 250   105   8       69
12,5 40,0 240   105     9     65
40,0 70,0 240   105     12     65
H113 ≥ 1,5 3,0 275   195   8   2,0 t 2,0 t 81
3,0 6,0 275   195   9     2,5 t 81
6,0 12,5 275   195   10     3,5 t 81
EN AW-
5154A
O
H111
≥ 1,5 3,0 215 275 85   15   1,0 t 1,0 t 58
3,0 6,0 215 275 85   17     1,5 t 58
6,0 12,5 215 275 85   18     2,5 t 58
12,5 50,0 215 275 85     16     58
EN AW-
5754
O
H111
≥ 1,5 3,0 190 240 80   16   1,0 t 1,0 t 52
3,0 6,0 190 240 80   18   1,0 t 1,0 t 52
6,0 12,5 190 240 80   18     2,0 t 52
12,5 70,0 190 240 80     17     52

(1) For information only

 

Chemical Composition

Alloy % Si Fe Cu Mn Mg Cr Zn Ti Others (%)
each total
5083 Min.
Max.
-
0.40
-
0.40
-
0.10
0.4
1.0
4.0
4.9
0.05
0.25
-
0.25
-
0.15
-
0.05
-
0.15
5086 Min.
Max.
-
0.40
-
0.50
-
0.10
0.2
0.7
3.5
4.5
0.05
0.25
-
0.25
-
0.15
-
0.05
-
0.15
5154A Min.
Max.
-
0.50
-
0.50
-
0.10
-
0.50
3.1
3.9
-
0.25
-
0.20
-
0.20
-
0.05
-
0.15
5754 Min.
Max.
-
0.40
-
0.40
-
0.10
-
0.50
2.6
3.6
-
0.30
-
0.20
-
0.15
-
0.05
-
0.15

Reference EN 573-3

 

Rolled Products

Alloy Characteristics Typical Uses Tempers
5083 Strongest alloy, with excellent resistance to
corrosion, highly suitable for welding.
Shipyard sheet and plate, naval and fast
ship hulls, yacht hulls, LNG storage tanks,
chemical equipment, welded superstructures
(high strength), pressure vessels.
0
H111
H112
H116
H321
5083
H128
Strong thermally stable alloy with highest resistance to corrosion. Shipyard sheet and plate, naval and fast
ship hulls, yacht hulls, LNG storage tanks,
chemical equipment, welded superstructures
(high strength), pressure vessels.
H128
5086 High strength with excellent resistance
to corrosion in marine environment. Good
workability and weldability.
Shipyard sheet and plate, shipping drums,
support structures, welded structures,
bulkheads, patrol and work boat hulls.
0
H111
H116
H321
5154A Very good corrosion resistance. Good
weldability and formability. Medium-high
strength (higher than 5754). High fatigue
strength. Good anodizing properties.
Welded structure, storage tanks, pressure
vessels, tanks, ship masts.
0
H111
5754 Superior corrosion resistance at elevated
temperatures, high strength, good
workability and weldability.
Applications with prolonged temperatures
higher than 66°C. Welded structures,
separators.
0
H111

 

Dimensions

The dimensional limits of the products which can be supplied depend upon alloys and tempers. In the following table the absolute limits are given for indication only.

Product name Thickness (mm) Width (mm) Length (mm)
Min Max Min Max Min Max
Cold rolled sheets 3,0 8,0 980 2500 800 15000
Hot rolled plates 8,0 60,0 900 2020 1000 12000

 

Dimensional Tolerances

The allowed dimensional tolerances are in compliance with the limits provided by the applicable required standards (i.e., EN 485-3, EN 485-4, ANSI H35.2). Other sizes, thickness and tighter tolerances on request.

 

Typical Physical Properties

Alloy 5083 5086 5154A 5754
Density 2.66 x 103 kg/m3 2.67 x 103 kg/m3 2.68 x 103 kg/m3 2.68 x 103 kg/m3
Average Coefficient of Thermal Expansion
(20÷100 ºC)
23.8 x 10-6per ºC 23.8 x 10-6per ºC 23.8 x 10-6per ºC 23.7 x 10-6per ºC
Approximate Melting Range 580÷640 ºC 585÷640 ºC 595÷645 ºC 595÷645 ºC
Thermal Conductivity 117 W/m ºC
(at 25 ºC)
126 W/m ºC
(at 25 ºC)
129 W/m ºC
(at 25 ºC)
132 W/m ºC
(at 25 ºC)
Modulus of Elasticity 71 GPa 71 GPa 70.5 GPa 70.5 GPa
Poisson’s ratio 0.33 0.33 0.33 0.33
Electrolytic Solution Potential -0.91 V* -0.88 V* -0.86 V* -0.86 V*

* Versus 0.1 N calomel electrode in an aqueous solution containing 53 g NaCl plus 3 g H2O per litre.

 

Typical Tecnological Properties

Welding capability

Alcoa Nautic-Al marine aluminium can be welded by TIG, MIG, Electron Beam or Spot welding. The mechanical properties in the heat-affected zone after welding* for marine sheet and plate alloys are summarized below:

Alloy Temper Thickness
mm
Rm
MPa
Rp0,2
MPa
5083 O All ≥ 275 ≥ 125
H111
H112
H116
H321
H128
5086 O All ≥ 240 ≥ 100
H111
H112
H116
H321
5154A O All ≥ 215 ≥ 85
H111
5754 O All ≥ 190 ≥ 80
H111

* Butt joint welding. 5356 or 5183 filler.

 

Certifications

Certification body Alloy Class
designation
Temper Max approved
Thickness (*)
Material specification Certification procedure Inspection document
American Bureau
of Shipping
ABS
5083 0 60 mm ABS Rules ABS Quality
Assurance Program
According to
EN10204 3.2
+
ABS Cover
H112
H116
H321
H111 60 mm EN 485-2 Witness test
5086 0 50 mm ABS Rules ABS Quality
Assurance Program
H112
H116
H321
H111 EN 485-2 Witness test
Bureau Veritas
BV
5083 0 60 mm BV Rules BV Mode I According to
EN10204 3.2
+
BV Cover
H111
H112
H116
H321
Det Norske
Veritas DNV
NV-5052 H32 10 mm DNV Rules DNV Manufacturer
Survey Arrangement
According to
EN10204 3.2
H34
NV-5754 0 50 mm
H111
H32 10 mm
H34
NV-5754A 0 10 mm
H111
NV-5083 0 60 mm
H111
H112
H116
H321
NV-5086 0 50 mm
H116
Lloyds Register
LR
5083 0 60 mm LR Rules Material Quality
Scheme
According to
EN10204 3.2
H111
H112
H321 40 mm
H116
H128 8 mm ASTM B928
Registro Italiano
Navale RINA
5083 0 40 mm RINA Rules Alternative Testing
Scheme (COLALT)
According to
EN10204 3.2
H111
H321 60 mm
H116
Germanischer
Lloyd GL
GL AW-5083 0 60 mm GL Rules Witness test According to
EN10204 3.2
H111
H112
H116
H321
Korean Register
KR
5083P 0 60 mm KR Rules Witness test KR Certificate
H112
H116
H321
5086P H116 50mm
Nippon Kaiji
Kyokai NKK
5083P 0 60 mm NKK Rules NKK Approval According to
EN10204 3.2
+
NKK Certificate
H112
H116
H321 EN 485-2
5083 H111 EN 485-2 (≤ 40 mm)
H111 EN 485-2 (≤ 40 mm)

(*) Minimum thickness 3 mm