aluminium in commercial vehicles - European Aluminium Association

EUROPEAN ALUMINIUM ASSOCIATION ALUMINIUM IN COMMERCIAL VEHICLES CHAPTER V 51
7.1. Elevated
temperature
The loss in strength at higher
than ambient temperatures is
negligible for temperatures up
to 100°C (short time exposure)
or 80°C (long time exposure).
7.2. Low and very low
temperatures
Contrarily to most other engineering
metals, the mechanical
properties improve at low temperatures
and especially the
elongation, which makes aluminium
an ideal metal for severe
winter conditions and even
cryogenic applications (see
Figure V.1)
Further examples can be found in
standard EN 12392 “Aluminium
and aluminium alloys - Wrought
products - Special requirements
for products intended for the production
of pressure equipment”.
When subjected to even higher
temperatures, then the loss in
mechanical properties is moderate
for non-heat treatable alloys
in the O/H111 temper and for
heat treatable alloys in the
T1/T4 temper.
CHANGE OF MECHANICAL CHARACTERITICS
AS A FUNCTION OF TEMPERATURE FOR
ALLOY 5086 O
R m - R p 0,2
MPa
500
400
300
200
100
‰
The loss in mechanical properties
at temperatures above
100°C is very pronounced for
non heat treatable alloys in the
H12, H16 temper as well as for
heat treatable alloys in the
T5/T6 temper.
FIGURE V.1
R m
A%
R p0,2
‰
50
40
30
20
10
0
-196 ° + 20 ° + 200 °
Temperature °C
A%