Oil tempered wire is a cold drawn, heat treated wire. The process of tempering increases the strength and hardness of the wire without making the wire more brittle. Tempering makes oil tempered wire perfect for springs and wire forms.
The springs used in car seats are often oil tempered wire springs. When oil tempered springs are covered with cloth cushioning, it provides plenty of comfort and support. The springs are often coated to avoid noise. This is especially important for infant car seats.
Another use of oil tempered wire in the automotive industry is in the filtration system for air bags. This filtration system is used to filter out dust and smoke in the air bag as well as smother flames during combustion. Oil tempered wire is perfect for this because it can handle the stress and heat pressure.