The Maxim
From Alternative History
(POD) An error is made in a steel mill, two steam boiler orders are mixed up, one for the engineer Hiram Maxim, and the other for the ship wright Anthony Duram. Maxim recieves a faulty boiler which explodes killing him and destroying his workshop in 1865. The ship wright Anthony Duram is not killed and becomes amazed at the strength of the steel boiler, inspiring him to design a steel warship for the Royal Navy. In 1872 the Monroe Doctrine was overturned by President Ulyssess S. Grant, due to threats from European powers about trade.
(Note)
