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Alternative
Designations: AS 5251;
BS 5251; DIN AlMg2Mn0.3; NF A 5251.
Note: 5251
is normally produced to BS 1470 specifications, but other National
Standards may be met on request..
| Chemical
Composition: |
|
|
|
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|
|
|
|
Other
elements
|
|
|
|
Si
|
Fe
|
Cu
|
Mn
|
Mg
|
Cr
|
Zn
|
Ti
|
Each
|
Total
|
Al
|
|
(% max except
where
a range is given)
|
0.40
|
0.50
|
0.15
|
0.10-0.50
|
1.7-2.4
|
0.15
|
0.15
|
0.15
|
0.05
|
0.15
|
Rem
|
Characteristics:
| |
Corrosion Resistance |
:
|
: Excellent |
|
Anodising |
: |
: Very Good |
|
Formability |
: |
: Very Good(in soft
temper) |
|
Machinability |
: |
: Fair |
|
Weldability |
: |
: Very Good |
|
Brazeability |
: |
: Poor |
Typical Uses:
General sheetmetal work; small marine craft; seam welded irrigation
tubes; road signs; containers; miscellaneous road transport, industrial
and chemical storage applications.
Availability:
|
Cut-to-Length
Sheet
|
|
Temper
|
H22
|
H24
|
(EN H26)
|
H28
|
O
|
|
Thickness
|
0.5 - 3.2
|
0.5 - 3.2
|
0.5 - 3.2
|
0.5 - 2.8
|
1.2 - 3.2
|
|
Min. Width
|
750
|
750
|
750
|
750
|
900
|
|
Max. Width
|
1535
|
1535
|
1535
|
1535
|
1535
|
|
Min. Length
|
800
|
800
|
800
|
800
|
1000
|
|
Max. Length
|
6100
|
6100
|
6100
|
6100
|
6100
|
|
Coiled
Sheet
|
|
Temper
|
H22
|
H24
|
(EN H26)
|
H28
|
O
|
|
Thickness
|
0.3 - 3.2
|
0.3 - 3.2
|
0.3 - 3.2
|
0.3 - 2.8
|
0.3 - 3.2
|
|
Min. Width
|
750
|
750
|
750
|
750
|
900
|
|
Max. Width
|
1535
|
1535
|
1535
|
1535
|
1535
|
|
Slit
Coils Minimum Widths, mm
|
| |
Temper
|
|
|
H1X
|
|
| |
H2X
|
O
|
|
Thickness
(mm)
|
FX
|
W16
|
| Over |
Up To |
GX
|
H111
|
| 0.29 |
0.39 |
200 |
Not
Available |
|
0.39
|
0.46
|
200
|
450
|
|
0.46
|
0.50
|
200
|
300
|
|
0.50
|
0.60
|
90
|
200
|
|
0.60
|
0.70
|
90
|
150
|
|
0.70
|
0.80
|
90
|
100
|
|
0.80
|
1.25
|
60
|
100
|
|
1.25
|
1.80
|
100
|
100
|
|
1.80
|
2.50
|
150
|
130
|
|
Circles
|
|
Temper
|
H22
|
H24
|
(EN
H26)
|
H28
|
O
|
|
Thickness
|
0.9 - 3.2
|
0.9 - 3.2
|
0.9 - 3.2
|
0.9 - 2.8
|
0.9 - 3.2
|
|
Min. Dia.(B)
|
500 (150)
|
500 (150)
|
500 (150)
|
500 (150)
|
500 (150)
|
|
Max. Dia.(B)
|
1535 (660)
|
1535 (660)
|
1535 (660)
|
1535 (660)
|
1535 (660)
|
(B) : Blanked only.
Sizes not inside bracket refer to sheared circle sizes available
Mechanical Properties (To BS Standards):
|
|
|
|
Ultimate
Tensile
|
Yield
|
Elongation
%
|
Ult
Shear
|
|
Temper
|
Gauge Range, mm
|
Strength, MPa
|
Strength, MPa
|
in 50 mm
|
Str., MPa
|
|
|
Over
|
Up to
|
Minimum
|
Maximum
|
Minimum
|
Minimum
|
Typical
|
|
O
|
0.50
|
0.80
|
160
|
200
|
60
|
18
|
124
|
|
|
0.80
|
1.30
|
160
|
200
|
60
|
18
|
124
|
|
|
1.30
|
2.60
|
160
|
200
|
60
|
18
|
124
|
|
|
2.60
|
3.00
|
160
|
200
|
60
|
20
|
124
|
|
|
3.00
|
3.20
|
160
|
200
|
60
|
20
|
124
|
|
H22
|
0.50
|
0.80
|
200
|
240
|
130
|
4
|
|
|
|
0.80
|
1.30
|
200
|
240
|
130
|
5
|
|
|
|
1.30
|
2.60
|
200
|
240
|
130
|
6
|
|
|
|
2.60
|
3.00
|
200
|
240
|
130
|
8
|
|
|
|
3.00
|
3.20
|
200
|
240
|
130
|
8
|
|
|
H24
|
0.50
|
0.80
|
225
|
275
|
175
|
3
|
138
|
|
|
0.80
|
1.30
|
225
|
275
|
175
|
4
|
138
|
|
|
1.30
|
2.60
|
225
|
275
|
175
|
5
|
138
|
|
|
2.60
|
3.00
|
225
|
275
|
175
|
5
|
138
|
|
|
3.00
|
3.20
|
225
|
275
|
175
|
5
|
138
|
|
(EN H26)
|
0.30
|
0.50
|
230
|
270
|
170
|
3
|
|
|
|
0.50
|
1.50
|
230
|
270
|
170
|
4
|
|
|
|
1.50
|
3.00
|
230
|
270
|
170
|
5
|
|
|
|
3.00
|
3.20
|
230
|
270
|
170
|
7
|
|
|
H28
|
0.50
|
0.80
|
255
|
285
|
215
|
2
|
|
|
|
0.80
|
1.30
|
255
|
285
|
215
|
3
|
|
|
|
1.30
|
2.60
|
255
|
285
|
215
|
3
|
|
|
|
2.60
|
3.00
|
255
|
285
|
215
|
4
|
|
|
|
3.00
|
3.20
|
255
|
285
|
215
|
4
|
|
Modulus of Elasticity: 70,000
MPa
Bend Radii: Minimum
recommended internal bend radii for 90º cold bends at right angle
to the rolling direction.
|
Thickness
|
|
Temper
|
0.4mm
|
0.8mm
|
1.6mm
|
3.0mm
|
|
O
|
0 t
|
0 t
|
0 t |
0.5 t
|
|
H22
|
0 t
|
0 t
|
1 t |
1.5 t
|
|
H24
|
0 t
|
1 t
|
1.5 t |
2 t
|
|
H28
|
1 t
|
1.5 t
|
2.5 t |
3 t
|
t
= Thickness
Welding:
5251 is readily welded by the TIG and MIG processes, using 5356
filler alloy. Welding 5251 in the H22, H24, H26 or H28 tempers will
reduce the tensile and yield strengths in the heat-affected zone
to those of the annealed condition.
5251 may also be gas
welded or resistance welded but the resulting joints are not as
strong or as corrosion resistant as the inert gas welded joints.
Moreover, gas welding could result in excessive heat distortion
and, in thinner gauges, may burn through. It is essential that all
traces of flux used in welding or brazing are removed by scrubbing
with hot water upon completion.
Annealing: 350ºC
± 5ºC, until all parts have reached the annealing temperature.
Weight Calculation:
Weight per square metre in kilogrammes: 2.69 x thickness in mm.
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