"Boron steel" refers to a type of steel that is strengthened with the element boron. This makes the steel very strong and durable, allowing it to be used in various applications, like automotive parts and construction materials. Full definition
The body structure features ultra high - strength boron steel in the B - pillar for added protection in a side impact and to improve roof strength. (topspeed.com)
Both the Focus hatchback and sedan boast extensive use of boron steel to increase vehicle stiffness and reduce weight. (automobilemag.com)
* Plus, all Ford vehicles use boron steel in their door intrusion beams, which helps protect occupants in side - impact collisions. (ford.com)