steel is very easy to work and weld predictably and to a standard that is more than sufficent for a wheel TBH.
if they were alloys i woudl be a lot more suspictious as there are a lot of really really sh!t aluminium alloys that come out of china, usally of a completly random composition made of recast sh!t. ally is a lot less forgiveing and recast amalgum alloys can have serious contamination issues and sketchy propoties resulting in metalfatiuge setting in rapidly