The big question is whether the Trump administration will give favored trade partners like Canada an exemption from the tariffs.
Peterson Institute President Adam Posen tells CNBC that the Trump tariffs on steel and aluminum imports are "straight up stupid."
The global steel market is recovering, making the timing of the proposed U.S. tariffs is "sort of weird" if targeted at China, says Julien Hall of S&P Global Platts.
The impact of import tariffs on steel and aluminum would not hit China hard, and the response would likely be incremental, says Hans Hendrischke of the University of Sydney Business School.
The amount of steel that goes into a car is "a pretty small part of the total costs", says Janet Lewis of Macquarie Capital Securities.
The U.S. stance on Taiwan or other regional issues may add fuel to any wider trade spat between the U.S. and China, says Ken Peng of Citi Private Bank.
Jake Parker of the US-China Business Council says "a coalition of like-minded countries" is required to address the issue of steel overcapacity with China.
Proposed import tariffs by the U.S. on steel and aluminum could be met with curbs on U.S. exports of items like soybeans to China, says Haiyan Wang, a professor at INSEAD in Washington, D.C.
Andrew Freris of Ecognosis Advisory says past American presidents have attempted to impose import tariffs on steel to little effect.