On Sun, 23 Jun 2019 09:29:05 +0700, John B.
wrote:

The steel bends or elongates prior to complete
failure while the carbon just breaks.

Veering sharply off-topic, that reminds me of the plastic clothespin
that snapped and cut my hand. A wooden clothespin will also be
destroyed by exposure to sunlight, but when it fails, it just sighs
and gives up.

I haven't seen plastic clothespins in the stores recently.

I've got a mouthful of plastic that got stronger when exposed to
ultraviolet. I don't expect to test its resistance to sunlight -- I'm
not *that* happy a cyclist!

--
Joy Beeson
joy beeson at comcast dot net
http://wlweather.net/PAGEJOY/