Aluminium is an important material in a large cross section of industries. It is suitable for forming, welding and

machining, and provides the following advantages.

High specific strength

High corrosion fatigue resistance

Low specific gravity (2.70g/cm ) approximately one third of steel

Highly economic to recycle

Good electrical conductivity; about 60% that of copper but reduced by the presence of alloying elements

Non magnetic

Although available in a number of grades, Aluminium can be divided into two major categories of wrought alloys.

Work hardening alloys i.e. Non heat treatable, include commercially pure aluminium and the alloys including manganese

or magnesium. The degree of work hardening is expressed as a temper H. These alloys can be fully or partly softened

by annealing (at 350 - 400 c).

3

0

Work Hardening Alloys

0

New Symbol

O

F

H12

H14

H16

H18

H22

H24

H26

Description

Annealed, soft

As fabricated

Strain-hardened, quarter hard

Strain-hardened, half hard

Strain-hardened, three quarter hard

Strain-hardened, fully hard

Strain-hardened, partially annealed, quarter hard

Strain-hardened, partially annealed, half hard

Strain-hardened, partially annealed, three quarter hard

Old BS Symbol

O

M

H2

H4

H6

H8

H2

H4

H6

Heat Treatable Alloys

Heat treatable alloys or precipitation hardening alloys include copper, magnesium, zinc and silicon as important

constituents. For these alloys, the designation system uses the letter T following the grade.

T6 The designation applies to products which are not cold worked

after solution heat-treatment, or in which the effect of cold work in flattening or straightening may not be

recognised in mechanical property limits.

T7 . This designation applies to products which are

artificially aged after solution heat-treatment to carry beyond the point of maximum strength to provide

control of some significant characteristic other than mechanical properties.

T8 The designation applies to products which

are cold worked to improve strength, or in which the effect of cold work in flattening or straightening is

recognised in mechanical property limits.

T9 This designation applies to products

which are cold worked to improve strength.

Solution heat-treated and then artificially aged.

Solution heat-treatment and then artificially aged

Solution heat-treated, cold worked and then artificially aged.

Solution heat-treated, artificially aged and then cold worked.

T3

The designation applies to products which are cold worked to improve strength after solution heat-

treatment, or in which the effect of cold work in flattening or straightening is recognised in

mechanical property limits.

T4

Solution heat-treated, cold worked and naturally aged to a substantially stable condition.

Solution heat-treated and naturally aged to a substantially stable condition.

T651 (permanent set 0.5% to 3 %

for sheet, 1.5% to 3 % for plate, 1% to 3 % for rolled or cold-finished rod and bar) and then artificially

aged. The products receive no further straightening after stretching.

Solution heat-treated, stress relieved by stretching a controlled amount

Typical Characteristics and Suitability for Processing - Wrought Aluminium

European Specifications with British Standard Comparison

KEY:

E = Excellent V = Very Good G = Good F = Fair D = Dark colours only N = Not recommended

* = As actual figures depend on size and form of material, these typical figures should only be used to compare alloys.

0.2%

Proof

Stress*

N/mm2

Tensile

Strength*

N/mm2

Inert Gas

Shielded

Arc Oxy-Gas

Resistance

to

Atmospheric

AttackFormability Machinability

Suitability For

Resistance

Spot ,Sea ,etcBrazing Soldering Protective Colour

Joining Anodising

55

133

60

115

143

280

255

255

420

70

140

185

140

250

285

87

150

190

100

200

225

90

180

130

270

1B

1B

1C

1C

1C

FC1

FC1

H15

H15

N3

N3

N3

N8

N8

N8

N4

N4

N4

N51

N51

N51

H9

H9

H30

H30

75

146

80

125

160

340

340

410

470

112

155

195

312

335

375

180

220

250

250

275

295

155

210

225

310

V

V

V

V

V

P

P

P

P

V

V

V

V

F

F

V

V

V

V

G

G

V

G

V

G

E

F

E

V

F

F

F

G

F

E

V

F

G

F

F

V

G

G

V

G

G

V

G

GG

F

G

F

F

G

E

E

G

V

F

F

G

G

V

V

G

G

V

G

V

V

G

G

G

V

V

V

V

V

V

N

N

N

N

V

V

V

E

E

E

V

V

V

E

E

E

V

V

V

V

V

V

V

V

V

N

N

N

N

V

V

V

F

F

F

V

V

V

F

F

F

F

F

F

F

V

V

V

V

V

N

N

E

E

E

E

E

E

E

E

E

E

E

E

E

E

V

V

V

V

V

V

V

V

V

N

N

N

N

V

V

V

N

N

N

N

N

N

N

N

N

VV

G

G

V

V

V

V

V

N

N

N

N

V

V

V

N

N

N

N

N

N

N

N

N

G

G

G

G

E

E

V

V

V

F

F

F

F

G

G

G

V

V

V

V

V

V

V

V

V

V

V

G

G

E

E

V

V

V

F(D)

F(D)

F(D)

F(D)

G

G

G

V

V

V

V

V

V

V

V

V

V

V

G

G

1050A-0

1050A-H8

1200-0

1200-H4

1200-H8

2011-T3

2011-T6

2014A-T4

2014A-T6

3103-0

3103-H4

3103-H8

5083-0

5083-H2

5083-H4

5251-0

5251-H3

5251-H6

5454-0

5454-H2

5454-H4

6063-T4

6063-T6

6082-T4

6082-T6

Old BS

DesignationMaterial

Designation

EN 485 - 1

EN 485 - 2

EN 485 - 3

EN 485 - 4

EN 515

EN 573 - 3

EN 573 - 4

EN 755 - 1

EN 755 - 2

EN 755 - 3

EN 755 - 4

EN 755 - 5

EN 755 - 6

EN 755 - 7

EN 755 - 8

Pr* EN 755 - 9

Technical conditions for inspection and delivery

Mechanical properties

Tolerances on shape and dimensions for hot rolled products

Tolerances on shape and dimensions for cold rolled products

Temper designations

Chemical composition

Forms of products

Technical conditions for inspection and delivery

Mechanical properties

Round bars, tolerances on dimension and form

Square bars, tolerances on dimension and form

Rectangular bars, tolerances on dimension and form

Hexagonal bars, tolerances on dimension and form

Seamless tubes, tolerances on dimension and form

Porthole tubes, tolerances on dimension and form

Profile tolerances on dimensions and forms

British StandardContent

BS 1470:1987 BS 1474:1987

Pr* - Due for publication

EN Number

Plate, Sheet and Strip Chemical Composition and Mechanical Properties

Material Designation

Chemical Composition

Mechanical Properties

Temper

Elongation

On 50mm Material Thicker ThanTensile Strength

Thickness

Over

mmUp to & inc-

luding mmEuropean

Standard

Old BS

Standard

1050A

3103

5251

5454

6082

1B

N3

N4

N51

H30

F

O

H12

H14

H18

F

O

H12

H14

H16

H18

F

O

H22

H24

H28

F

O

H22

H24

O

T4

T6

T451

T651

3.0

0.2

0.2

0.2

0.2

3.0

0.2

0.2

0.2

0.2

0.2

3.0

0.2

3.0

6.0

25.0

6.0

25.0

90.0

115.0

25.0

6.0

6.0

12.5

3.0

25.0

6.0

3.0

3.0

3.0

3.0

25.0

3.0

25.0

25.0

90.0

25.0

90.0

115.0

150.0

-

60

130

175

215

-

80

180

200

-

120

115

255

240

115

115

240

240

230

220

-

160

200

225

255

-

215

250

270

-

200

200

295

295

200

200

295

295

285

275

-

200

240

275

285

-

285

305

325

155

-

-

-

-

-

-

-

-

-

-

3.0

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

25.0

6.0

6.0

12.5

3.0

25.0

6.0

6.0

12.5

6.0

3.0

-

-

-

-

-

-

-

-

-

-

-

-

55

80

100

135

-

90

120

140

160

175

-

95

115

135

-

-

22

44

3

-

25

6

5

3

-

30

8

6

4

-

32

9

6

4

-

32

9

8

-

-

20

5

3

2

2

-

18

4

3

2

-

23

6

4

3

3

-

18

5

4

3

-

24

7

5

4

4

-

18

6

5

3

-

24

9

6

4

4

-

20

8

5

4

-

25

9

7

4

-

-

20

8

5

4

-

12

4

3

-

14

5

4

-

16

7

5

-

18

8

6

-

14

-

-

16

15

-

8

-

-

-

-

-

-

-

16

15

-

8

-

-

-

-

-

-

-

16

15

-

8

-

-

-

-

-

-

-

15

15

-

8

-

-

-

-

-

-

-

-

-

15

-

8

-

-

-

-

-

-

-

130

145

175

195

-

0.5mmmin %

0.8mmmin %

1.3mmmin %

2.6mmmin %

3.0mmmin %

Si

Fe

Cu

Mn

Mg

0.50

0.70

0.10

0.9-1.5

0.30

Si

Fe

Cu

Mn

Mg

0.40

0.50

0.15

0.10-0.50

1.7-2.4

Si

Fe

Cu

Mn

Mg

0.25

0.40

0.10

0.50-1.0

2.4-3.0

Si

Fe

Cu

Mn

Mg

0.7-1.3

0.50

0.10

0.40-1.0

0.6-1.2

Si

Fe

Cu

Mn

Mg

0.25

0.40

0.05

0.05

0.05

Zn

Ti

Others

0.07

0.05

0.03

Cr

Zn

Others

0.10

0.20

0.015

5083 N8 F

O

H22

H24

3.0

0.2

0.2

0.2

25.0

80.0

6.0

6.0

-

125

235

270

-

275

310

345

-

350

375

405

-

12

5

4

-

14

6

5

-

16

8

6

-

16

10

8

-

16

8

6

Si

Fe

Cu

Mn

Mg

0.40

0.40

0.10

0.40-1.0

4.0-4.9

Cr

Zn

Ti

Others

0.05-0.25

0.25

0.15

0.15

Cr

Zn

Ti

Others

0.15

0.15

0.15

0.15

Cr

Zn

Ti

Others

0.05-0.2

0.25

0.20

0.15

Cr

Zn

Ti

Others

0.25

0.20

0.10

0.15

Properties in the F condition are given for information only.

Bars, Extruded Round Tube and Sections Chemical Composition and Mechanical Properties

Si

Fe

Cu

Mn

Mg

0.50-0.90

0.50

3.9-5.0

0.40-1.2

0.20-0.80

Cr

Ni

Zn

Ti

Others

0.10

0.10

0.25

0.15

0.15

T4

T6/T651

-

-

-

150

-

-

150

200

200

150

200

25

150

200

-

100

130

120

150

195

150

15

13

16

13

8

8

6

13

12

14

-

7

7

-

14

1213

11

-

20

75

150

-

20

75

150

20

75

150

200

20

75

150

200

230

250

250

230

370

435

420

390

370

390

390

370

435

480

465

435

11

11

9

8

7

7

7

7

10

-

-

-

6

-

-

-

-

-

-

-

-

-

-

-

H152014A

Material Designation

Chemical Composition

Mechanical Properties

Temper

ElongationTensile Strength

Thickness

Over

mmUp to & inc-

luding mmOn 50 mm min %

European

Standard

Old BS

Standard

0

F

0

F

T4

T5

T6

-

-

70

70

110

160

130

140

-

-

-

-

-

-

-

-150

150

125

130275

280-

-

Si

Fe

Cu

Mn

Mg

0.40

0.40

0.10

0.40-1.0

4.0-4.9

Cr

Zn

Ti

Others

0.05-0.25

0.25

0.15

0.15

Si

Fe

Cu

Mn

Mg

0.20-0.6

0.35

0.10

0.10

0.45-0.9

Cr

Zn

Ti

Others

0.10

0.10

0.10

0.15

5083

6063

N8

H9

0

F

T4

T5

T6

200

200

150

200

6

20

150

240

170

-

-

-

-

-

-

-

-

110

190

170

270

295

310

280

-

-

120

100

230

255

270

240

-

-

-

150

-

-

20

150

16

13

16

13

9

8

8

5

14

12

14

-

8

7

-

-

Si

Fe

Cu

Mn

Mg

0.7-1.3

0.50

0.10

0.40-1.0

0.6-1.2

Cr

Zn

Ti

Others

0.25

0.20

0.10

0.15

6082 H30