What strength level (yield strength) do you think
a body panel for a modern family saloon car (e.g. roofs and side wings) should have?
Less than 150 MPa - I'm afraid that it is almost impossible to achieve strength levels of less than 100
MPa in a commercial strip steel. Pure iron has a strength level of ˜ 30 MPa and as soon as you
introduce grain boundaries, dislocations and any carbon the strength level increases. Try again. |
150 - 250 MPa - Correct, the basic strip grades used will have a strength level of about 160 MPa.
For a simple body panel in a modern family saloon car (i.e. roofs and wings) the typical
strength level will be about 200 MPa. |
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250 - 350 MPa - Some of the higher strength strip grades used in body panels that require additional strength
levels will fall into this category e.g. door panels.
These would then be a different grade of strip steel. Try again. |
|
350 - 500 MPa - This would only really include the top end of the strip steel strength levels
which would be used for more structural panels. This strength range is more typical of high strength
low alloy (HSLA) steels that would be used for plates and sections. Try again. |
|
500 - 700 MPa - This is now entering the high strength range of steels and is not appropriate for
an automotive strip steel. Try again. |
|
Greater than 700 MPa - I'm afraid that you are well off with this selection. Try again. |
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Click on your answer to check and make a note of the answer on your notepad. |
NOTEPAD
The 3 most important properties for an automotive body panel are:
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Corrosion Resistance
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Formability
-
Cost
Typical yield strength level for a family saloon car panel (roof or wing) is:
150 - 250 MPa (more accurately 200 MPa)
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