Timken is still in business, and I think they might be a part of Latrobe.
Timken makes several different alloys for different purposes, mostly bearings for car engines and other applications. They also make steel tubing.
Timken steel is also used for some of the inside parts of car engines.
I don't know if Timken only made the steel and other companies made the bearings from Timken steel, or if Timken did it all.
They also have made, and might still make them, barrels for the large military guns, or at least make the steel used in the barrels.
I don't know the alloy used in the gun barrels, but IIRC, and it has been a long time ago, it was determined that this paticular alloy was not suitable for small arms barrels and barrel manufacturers stopped using it.
Or maybe it was no better than anything else, but cost more, but I can remember reading about it no longer being used for gun barrels.
