US import costs of steel and aluminium, used in everything from baseball bats to cars and aircraft parts, are expected to rise by more than $100bn after Donald Trump raised tariffs on the metals to 50 per cent this week.

U.S. President Donald Trump hiked nearly all of his tariffs on steel and aluminum imports to a punishing 50% on Wednesday in a move that’s set to hammer businesses from automakers to home builders, and likely push up prices for consumers even further.