Newfie, I doubt that much US steel production is left. Not all of it was lost to unfair trade practices, however. I remember when we drove cross-country with my daughter looking for her undergraduate college. One of the places we stopped at was Duquesne university, a private Catholic school in Pittsburgh, Pennsylvania.
Pittsburgh, Pennsylvania WAS ONCE a steel town, just about the premier steel town in the USA, ever since the US automobile industry grew along the Great Lakes, along with the pig iron/steel industry and the coal/coke production that supported it. To understand what is left, you must distinguish the pig iron production from iron ore and coal/coke (which is GONE completely in the USA) from the multitude of raw steel fabrications and specialized stainless alloy production (SOME of which remains). Today we export iron and steel scrap to China, India, and Korea. Today we buy finished cars, ships and appliances from these countries. Here is when this happened:
...which means that most such jobs were exported during the working careers of those who are still alive and still voting. In fact in Pittsburgh, you can still see the skeletons of the massive steel mills in the city and along the river:
...while throughout the US MidWest, you can see the bones of the former automobile industry, also lost. Here in Silicon Valley, I remember the GE plant in San Jose, the last GE plant that made small appliances such as toasters and hand irons, closed in the 1980s when they moved those jobs to Mexico, part of Ross Perot's infamous NAFTA "sucking sound".
...which is today a shopping mall called "The Plant", with a Best Buy and a Home Depot and other icons of today's US retail, selling imported goods and materials from China/India/Korea/Mexico/etc.
Without belaboring the point too much, these jobs were lost from the US and from Europe's EU for
two reasons:
1) The lower cost of human labor in the Far East and other Second World nations.
2) The tightening environmental regulations from the USA and Europe, which made such domestic production of both "Heavy Industry" (iron/steel/automobiles/etc.) and "Light Industry" (the fabrication of appliances and electronics and petrochemical plastics into finished goods) uncompetitive in the USA.
These facts are known to the US Middle Class to whoom it happened, because it happend in the last 40 years. This is why Donald Trump is in office today. It is also why China, India, and to a lesser extent Korea and Mexico and South American nations are hellholes of pollution.
Because the USA and Europe exported that pollution along with Middle Class jobs. That is why those places are so unhealthful and why the Olympic athletes to both Beijing (2008) and Rio (2012) were laid low by respiratory distress.
I'm saying we had both benefits and harm from losing the jobs and the great shrinking Middle Class in the USA and Europe. I was in one sense incredibly lucky to see this happen, while remaining employed in Low/Middle Management. But I also saw perhaps an estimated 100 blue collar jobs lost while people like me kept our white collar positions and the nature of Silicon Valley changed greatly. This is no longer the same sort of place I relocated to in the 1980s. Nor is most of Europe or the USA, nor are China/India/Korea/South America.