OK found it (or rather one of them,) directly from UNIVAIR here:
Our Taylorcraft front struts are approved and manufactured with .049” wall fronts and .035” rear struts of the proper original style streamlined cross section.
Again, our front and rear Taylorcraft are made from an original Taylorcraft streamlined tube cross section that Univair had to make tooling specifically for. We are not using an alternate cross section.
Airframes per Gary Snell:
The rear strut is made of normalized 4130 but the front strut is .035" 1010 mild steel, same that they use on the cubs.
From Lee at Airframes--Via Lance:
Rear strut matl is .049 4130 cromoly UNBREAKABLE
Front Strut Matl is the same that we build supercub front struts out of -600D
If and when I hear THE FACTORY has actually shipped someone a set of struts I will go to the trouble of listing what specs I can find on those.
Our Taylorcraft front struts are approved and manufactured with .049” wall fronts and .035” rear struts of the proper original style streamlined cross section.
Again, our front and rear Taylorcraft are made from an original Taylorcraft streamlined tube cross section that Univair had to make tooling specifically for. We are not using an alternate cross section.
Airframes per Gary Snell:
The rear strut is made of normalized 4130 but the front strut is .035" 1010 mild steel, same that they use on the cubs.
From Lee at Airframes--Via Lance:
Rear strut matl is .049 4130 cromoly UNBREAKABLE
Front Strut Matl is the same that we build supercub front struts out of -600D
If and when I hear THE FACTORY has actually shipped someone a set of struts I will go to the trouble of listing what specs I can find on those.