S90 ultra high strength steel
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    1. #1
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      S90 ultra high strength steel




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    3. #2
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      And the new xc90 for comparison




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    4. #3
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      S90 ultra high strength steel

      Initial observation is that the new S90 has more boron/ultra high strength steel than the new xc90. Look underneath the driver seat and you will see a red cross bar (boron) in the floor of the S90, but this is orange (extra high strenth steel) in the XC90. This upgrade to boron in the S90 (if the depiction is accurate) may further improve side impact crash test performance/safety. Otherwise we are talking about essentially the same structure.


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    6. #4
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      But wait... There's more !

      Looks like the C pillar's roof cross bar in the new S90 is red (boron) too !

      Good to see these noteworthy improvements as both could really help with the serious injuries (and death) suffered in T bone crashes.


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    7. #5
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      Quote Originally Posted by Stevey View Post
      Initial observation is that the new S90 has more boron/ultra high strength steel than the new xc90.
      No. The S90 has 35% by weight while the XC90 has 40%.

    8. #6
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      Yes, S90 is 35%

      http://www.autoblog.gr/wp-content/up...-FACTSHEET.pdf





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    9. #7
      Member JOHN T SHEA's Avatar
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      Like all things, Boron steel is good in its place, which is not everywhere. It is stiff but also brittle, so a higher percentage does not necessarily translate into greater safety. A car made completely of boron steel would probably be too stiff and crack-prone to use.

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