ALCOA NAUTIC AL PLATE.pdf

7/24/2019 ALCOA NAUTIC AL PLATE.pdf

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S E T T I N G A N E W M A R I N E S T A N D A R D


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I n d u s t r i e s

Performance is as important in the yard as it is on the water. You wanthigh performance, user-friendly materials that give you the freedom toexpress your vision. Structural efciency. Unimpeachable quality. Andgenuine versatility.

Thats why so many of todays best performing vessels, large andsmall, are constructed from Alcoa aluminium. Ever since we developedstrain-hardened 5xxx series alloys to provide the exceptional strength,workability and corrosion resistance that marine applications require,aluminium has been the material of choice for forward-lookingdesigners wherever durability, economy of operation and construction,responsiveness or sheer speed are priorities.

Setting a new marine standard

Photograph courtesy of Damen Shipyards Group, Netherlands, 2008

Photograph courtesy of Mondo Marine, Italy, 2008


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H128. Combining improved corrosionresistance with high yield strengthAlcoas new temper for marine sheet is specically designed toprovide both commercial and naval shipbuilders with improvedcorrosion resistance. H128 meets an accelerated corrosion testspecied by the US Navy to provide resistance to sensitisation andcontribute to ships meeting their planned service life.

The excellent corrosion resistance of Nautic-AL alloys is one oftheir most important characteristics. Welds of these products arenormally as corrosion resistant as the parent alloy. Under certainconditions, however, such as exposure to high temperatures,marine alloys may become susceptible to inter-granular andexfoliation corrosion.

Regular, prolonged, periods of deck temperatures above 70 C havebeen recorded on Naval ships and corrosion, in combination withthe stress endured during the long service life of a vessel, can leadto cracks in both painted and unpainted ship hulls. This inevitably

leads to higher maintenance costs or substantial repair costs toremedy water intrusion.

Nautic-Al H128 provides superior thermal stability and highercorrosion resistance, reducing risk and lowering maintenance andrepair costs. Additionally, building with H128 offers the possibility ofcost saving through less painting costs and simplied warranty plans.

Another Alcoa rstAlcoa was rst to develop this new temper through a two-yeardevelopment programme between the Alcoa Technical Center inPittsburgh (USA) and the manufacturing facilities in Fusina (Italy)and Davenport (USA), and led it for registration at the USAluminium Association, along with a revision to ASTMB928 toinclude H128 and its testing requirements.

S E T T I N G A N E W M A R I N E S T A N D A R D


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50835456

5454-H32

5086

5083 H128

0 1 2 3 4 5

Y i e l d S t

r e n g

t h

Corrosion Resistance

Nautic-Al H128 High Yield Strength andCorrosion Resistance

w w w . a l c o a . c o m / n a u t i c a l

With a specic weight about one third that of steel, analuminium hull and superstructure typically weighs less

than half as much as a steel one of equivalent strength.This lightness translates into greater capacity, speed or fueleconomy and range as well as conferring inherently superiormanoeuvrability. The advantage is even greater in vessels ofless than 30 metres (where hull weight is more critical)because of minimum plate thickness.

StrongerAn aluminium hull will survive signicantly higher ultimateloads than a comparable GRP (glass reinforced plastic) hull,and since aluminium is less brittle there is less risk of hullpenetration. Additionally small holes do not enlarge with

external pressure as is the case with GRP. Aluminium has fargreater structural efciency (stiffness-to-density ratio) thansteel and with magnesium as the major alloying element, thefatigue strength of 5xxx series products is among the highestof all aluminium alloys.

TougherWith a microstructure designed for

excellent corrosion resistance in theharshest marine environment,aluminium sheets are the perfectchoice and can have a positive impacton long-term maintenance. They aresuitable for a wide range of surfacetreatments. All Nautic-Al productsmeet or exceed the ASTM B928 standard for high magnesiumaluminium-alloy sheet and plate for marine service andtherefore meet the corrosion requirements of both the ASTMG66 (ASSET) and ASTM G67 (NAMLT) tests.

EasierAluminium is of course as easy to work as it is versatile easyto cut, bend, cold form and engineer with standard tools. Alcoa5xxx alloys are quick to weld using GMA-W or GTA-Wprocesses; not only does aluminium resist distortion duringwelding better than steel, but the welds themselves are highlyductile for subsequent cold forming. Taken together, thesefactors deliver considerable cost advantages for the constructor.

Total capabilityThe undisputed world leader in aluminium production andtechnology, Alcoa gives you the benet of complete technicaldesign, engineering and production support. All the marinealuminium products in the comprehensive Nautic-Al rangeare tested to the highest international standards. And asyou would expect of a company voted one of the mostsustainable corporations on the planet by the WorldEconomic Forum every year since the ranking began,Alcoa products are easy to recycle - almost 70% of thealuminium ever produced is still in use.

Naval AluminiumThink Light


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

Mechanical Properties

Alloy TemperThickness

mmRm

MpaRp0,2Mpa

Elongation, min.% Bend radius Hardness

HBW(1)Over Up to Min. Max. Min. Max. A50 A 180 90

EN AW-5083

OH111

1,5 3,0 275 350 125 13 1,5 t 1,0 t 753,0 6,3 275 350 125 15 1,5 t 756,3 12,5 270 345 115 16 2,5 t 75

12,5 50,0 270 345 115 15 7550,0 80,0 270 345 115 14 73

H112 8,1 12,5 275 125 12 7512,5 40,0 275 125 10 7540,0 80,0 270 115 10 73

H116H321

1,5 3,0 305 215 8 3,0 t 2,0 t 893,0 6,0 305 215 10 2,5 t 896,0 12,5 305 215 12 4,0 t 89

12,5 40,0 305 215 10 8940,0 60,0 285 200 10 89

H128 > 3,0 8 305 385 215 10 2,5 t 89

EN AW-5086

OH111

1,5 3,0 240 310 100 13 1,0 t 1,0 t 653,0 6,0 240 310 100 15 1,5 t 1,5 t 656,0 12,5 240 310 100 17 2,5 t 65

12,5 80,0 240 310 100 16 65

H112 8,1 12,5 250 105 8 6912,5 40,0 240 105 9 6540,0 80,0 240 100 12 65

H116H321

1,5 3,0 275 195 8 2,0 t 2,0 t 813,0 6,0 275 195 9 2,5 t 816,0 12,5 275 195 10 3,5 t 81

12,5 50,0 275 195 9 81

EN AW-5456

O

> 1,5 6.3 290 365 130 205 16 2,5 t 80

6.3 80,0 285 360 125 205 16 14 80

H116

> 1,6 12,5 315 230 10 4,0 t 9012,5 30,0 315 230 10 9030,0 40,0 305 215 10 9040,0 60,0 285 200 10 85

H321

> 2,5 4,0 330 405 235 10 4,0 t 904,0 12,5 315 405 230 12 90

12,5 40,0 305 385 215 10 8540,0 60,0 285 370 200 10 85

EN AW-5154A

OH111

1,5 3,0 215 275 85 15 1,0 t 1,0 t 583,0 6,0 215 275 85 17 1,5 t 586,0 12,5 215 275 85 18 2,5 t 58

12,5 50,0 215 275 85 16 58

EN AW-5754

OH111

1,5 3,0 190 240 80 16 1,0 t 1,0 t 523,0 6,0 190 240 80 18 1,0 t 1,0 t 526,0 12,5 190 240 80 18 2,0 t 52

12,5 80,0 190 240 80 17 52

H32 1,5 3,0 220 270 130 10 2,0 t 1,5 t 633,0 6,0 220 270 130 11 1,5 t 636,0 12,5 220 270 130 10 2,5 t 63

H34 1,5 3,0 240 280 160 7 2,5 t 2,0 t 703,0 6,0 240 280 160 8 2,5 t 706,0 12,5 240 280 160 10 3,0 t 70

EN AW-

5052

H32 1,5 3,0 210 260 130 7 1,5 t 1,5 t 613,0 6,0 210 260 130 10 1,5 t 616,0 12,5 210 260 130 12 2,5 t 61

H34 1,5 3,0 230 280 150 6 2,0 t 2,0 t 673,0 6,0 230 280 150 7 2,5 t 676,0 12,5 230 280 150 9 3,0 t 67

(1) For information only


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

indication only.

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

Product nameThickness (mm) Width (mm) Length (mm)

Min Max Min Max Min MaxCold rolled sheets 3,0 8,0 980 2500 1000 15000Hot rolled plates 8,0 60,0 900 2020 1000 12000

Reference EN 573-3

Chemical Composition

Rolled Products

Dimensions

Alloy % Si Fe Cu Mn Mg Cr Zn TiOthers (%)

each total

5083 Min.Max.-

0.40-

0.40-

0.100.401.00

4.004.90

0.050.25

-0.25

-0.15

-0.05

-0.15

5086Min.Max.

-0.40

-0.50

-0.10

0.200.70

3.504.50

0.050.25

-0.25

-0.15

-0.05

-0.15

5456 Min.Max.-

0.25-

0.40-

0.100.501.00

4.705.50

0.050.20

-0.25

-0.20

-0.05

-0.15

5154A Min.Max.-

0.50-

0.50-

0.10-

0.503.103.90

-0.25

-0.20

-0.20

-0.05

-0.15

5754 Min.Max.-

0.40-

0.40-

0.10-

0.502.603.60

-0.30

-0.20

-0.15

-0.05

-0.15

5052 Min.Max.-

0.25-

0.40-

0.10-

0.102.202.80

0.150.35

-0.10

--

-0.05

-0.15

Alloy Characteristics Typical Uses Tempers

5083 Strongest alloy, with excellent resistance tocorrosion, highly suitable for welding.

Shipyard sheet and plate, naval and fastship hulls, yacht hulls, LNG storage tanks,

chemical equipment, welded superstructures(high strength), pressure vessels.

0H111H112H116H321

5083H128

Strong thermally stable alloywith highest resistance to corrosion.

Shipyard sheet and plate, naval and fastship hulls, yacht hulls, LNG storage tanks,

chemical equipment, welded superstructures(high strength), pressure vessels.

H128

5086High strength with excellent resistance

to corrosion in marine environment. Goodworkability and weldability.

Shipyard sheet and plate, shipping drums,support structures, welded structures,bulkheads, patrol and work boat hulls.

0H111H116H321

5154A

Very good corrosion resistance. Goodweldability and formability. Medium-highstrength (higher than 5754). High fatigue

strength. Good anodizing properties.

Welded structure, storage tanks, pressurevessels, tanks, ship masts.

0H111

5456 Superior alloy, with excellent resistance tocorrosion, highly suitable for welding.

Shipyard sheet and plate, naval and fast shiphulls, yacht hulls, welded superstructures

(highest strength).

0H116H321

57545052

Superior corrosion resistance at elevatedtemperatures, high strengths, good

workability and weldability.

Applications with prolonged temperatureshigher than 66 C. Welded structures,

separators.

0H111H32H34


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

Alloy Temper Thickness(mm)Rm

(MPa)Rp,02(MPa)

5083

0

All 275 125

H111H112H116H321H128

5086

0

All 240 100H111H112H116H321

54560

All 285 125H116H321

5154A0

All 215 85H111

5754

0

All 190 80H111H32H34

5052 0 All 165 65H111

Alloy 5083 5086 5456 5154A 5754 5052

Density 2.66 x 103 kg/m3 2.67 x 103 kg/m3 2.66 x 103 kg/m3 2.68 x 103 kg/m3 2.68 x 103 kg/m3 2.68 x 103 kg/m3

Average Coefcient ofThermal Expansion

(20100 C)

23.8 x 10-6 per C 23.8 x 10-6 per C 23.9 x 10-6 per C 23.8 x 10-6 per C 23.7 x 10-6 per C 23.8 x 10-6 per C

Approximate Melting Range 580640 C 585640 C 570640 C 595645 C 595645 C 605650 C

Thermal Conductivity 117 W/m C(at 25 C)126 W/m C

(at 25 C)117 W/m C(at 25 C)

129 W/m C(at 25 C)

132 W/m C(at 25 C)

138 W/m C(at 25 C)

Modulus of Elasticity 71 Gpa 71 Gpa 71 Gpa 70.5 Gpa 70.5 Gpa 70.5 Gpa

Poissons ratio 0.33 0.33 0.33 0.33 0.33 0.33

Electrolytic SolutionPotential -0.91 V* -0.88 V* -0.87 V* -0.86 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.

* Butt joint welding. 5356 or 5183 ller.

Typical Physical Properties

Typical Technological Properties


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ALCOA NAUTIC AL PLATE.pdf