On 23 March 2018, US tariffs of 25% on steel imports
and 10% on aluminium imports took effect.
Reasons
Domestic steel & aluminium production
is essential for national security applications.
Imports in such quantities as are presently found adversely
impact the economic welfare of the U. S. steel & aluminium industry.
Effects
What if the Section 232 Tariffs are abolished?
Reverting back to the situation before Section 232.
EU may (but probably not) soon withdraw the Safeguard measure.
The advantage would clearly be on the EU side.
A quota system
Reasons
As US limited the import, EU has to respond to this change, decreasing their import as well, or their net export will be lowered, causing a decrease in domestic AD.
Effects of quota
Increase in quality supplied, decrease in quantity demanded and decrease in imports.
Domestic consumers are worse off.
Domestic producers are better off.
Domestic employment increases.
Domestic income distribution worsens.
Increased inefficiency in production.
If canceled
US is highly possible to keep Section 232, limiting import. This way, EU worse off in net export.
Conclusions
No real solutions have yet been proposed and it will be very difficult to find them.