[ Ref. 240105 MMDigest, Flat Steel Bar Stock For Player Pianos ]

Bill Klinger noted [240107 MMD], "This material used to be listed in
McMaster-Carr as 'flattened wire'. Apparently it was made by flattening
round stock in a rolling mill, which gave it the rounded edges."

Robbie added, "Also known as flattened tape, it is used as a material
for the manufacture of springs, saws, bushings of motorbike chains,
etc."

That would make it into the white "cold rolled steel" which it
work-hardened to produce a higher yield point. This is in contrast to
the "black" hot-rolled steel which you find in your hardware department
and which bends easily, due to being annealed in the process.

Thanks for the information, guys. I wasn't aware that it was sold as
a raw material since it isn't in stores.

Wallace Venable