explorin2
On a side note, I mentioned that SS (stainless steel) in generally better at lower temperatures. This is a vague statement and needs to be treated as such. Alot of cryogenic vessels/piping are made from stainless steel. For example: In the pressure equipment world, the word impacts (toughness) comes up alot. Mild steel is generally in the range -20 to -50C, depending on grade, range for good impacts, below this one can run into problems. The common grades of stainless - like 316/304 generally impact down the -280 C temp range without issue. When you go below those temps, the most serious problem is cracking ... and I mean bad cracking .. things literally fall apart... when under pressure or load.
Hope this helps you out
Stainless gun barell steel is 416S for Sulfur. The sulfur is added to make it chip and is therefore more machineable. The SS you are talking about, I believe has no sulfer added and is tougher at lower temps and stains less readily than 416S. It would also chew up a barell makers equipment faster than he could scream "there's no money in this business!" I wonder what type of SS is used on the actions of the various makers. Ruger claims their SS bolts are tougher than non SS, so must be non Sulfur steel?[/QUOTE]
On the 416SS, makes sense... and thanks for the info, greatly appreciated. I've been around and shot firearms since I was quite young but have only recently taken a real interest, and just purchased my first one.
I am used to working with weldable grades, the austenitic and duplex grades, and got a bit tunnel visioned on them. Didn't even think to consider the martensitic grades, as is 416SS, which after some digging I can now see would be the ideal due to their machinability and hardenability through heat treatments.
AND IT MOST LIKEY HAS VERY LOW IMPACT TEMERATURE .. I would guess nothing more than -20. I'm glad you point this out.
On the Ruger topic, I'm thinking by toughness you mean hardness / wear resistance? In my area of work toughness is generally used to describe a materials ability to impact.
I can't even begin to guess what Ruger uses for material. My uneducated responce would be a martensitic grade SS with sulphur, and the secret to their "claim" maybe in the heat treatment. Such as quench and temper or nitriting, To remove the sulphur could have an impact on cost in achieving high tolerances.
Regarding SS vs non SS for "toughness as you put it" is getting pretty deep into heat treatments and I have no real knowledge of the two. I'm thinking it would be on the one who wants to spend the most though... in this day and age they can do some amazing things.
Again thanks for your comment .... I learned something today ... and pulled my head out of my ass.