Actually, the S&W Scandium Airweights, and all of the S&W scandium pistols, are aluminum alloy with a pinch of scandium in it. They aren't made of scandium. Here's a link to the patent that S&W held. (holds?)bearfacedkiller wrote: ↑Thu May 21, 2020 9:57 amYup, sure is. Model 360. All the 300 series guns are scandium airweights. The barrel and cylinder are stainless I believe.
https://patents.google.com/patent/US6711819B2/en
Alloys used in firearms are just like alloys in knife blades. In blades, add a or take out touch of this element or that element and you can increase toughness, hardness, edge retention, sharpen-ability, edge smoothness, grind-ability etc.
When you fire a firearm the metal takes a pounding. It stretches, twists, distorts, etc. Steel firearms do this, and aluminum being softer, distorts easier. Over time the metal wants to stay stretched, twisted, or distorted to the point of cracking and breaking. Scandium makes the metal return to its original machined dimensions longer.
On a slightly different topic, I spoke to a gunsmith years ago about tuning up a Colt Detective Special for me. There weren't a lot of Colt revolver gunsmiths out there then, fewer, if any now. He said he didn't work on Colt's anymore because they're a pain in the butt. He said the first thing a gunsmith would do to tune up a worn Colt was to give the back of the grip frame a good whack with a plastic hammer. He said Colts that were shot a lot hand frames that would bend upward, from recoil, at the top of the grip. Whacking the grip frame a couple of times would bring it back to "factory spec." Because Colt internal parts were hand-fitted there were 18 (?) internal parts that you now had to check to make sure the timing was right. If you touched up one part you had to touch up some of the others to get them to play nice. When one part got worn it would throw the timing out, and the bent frame only made things worse.
So, Darby's 360 would last much longer than my 442 Airweight, (no scandium,) even with a steady diet of just .38 +P's.