inb4 China ends up making a huge profit due to the tariffs. ;P
That's not really how it works. This is a short-term spike in prices, which can be put down to market instability.
Once things settle down, this will be bad for Chinese steel exports. e.g. the tariff will make it more expensive to sell steel to the USA, driving down the volume of exports there, and that will mean that additional steel will be dumped into every other market, e.g. the price of steel in USA will rise, but the profits will be more than eaten away by the additional taxes, and there will be increased competition for other markets, driving profits down. This won't help US steel exports either, since they're still competing with the Chinese, except now the Chinese will be diverting more steel away from the USA to other markets.
The whole point of tariffs is that it drives up the local price of the commodity, meaning local producers become more "competitive". But of course, prices going up has another name: inflation.
The irony here is that Venezuela opened a floating currency exchange back on Jan 25th, to replace the government-controlled system, and on that very day inflation
stopped, and now the value of the Venezuelan currency has stabilized, and is gradually increasing in value. It would be
really ironic if Trump completely fucked the USA's economy by bringing in the very type of "socialist" protectionist policies that fucked up the economy in Venezuela, and that Venezuela's Maduro government is now backing away from.