Reply With QuoteI would think all modern SS barrels are 416R to deal with cold weather...
I did a search and the most current comments I found were from 2016. Things may have changed since then. Thanks.
I would think all modern SS barrels are 416R to deal with cold weather...
It would be cool to sample a piece with a PMI gun to see what it really is. Anyone have a sample after a barrel trim.
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Since 416R tends to be a premium SS and most manufacturers who are suppling it, make lots of noise about using it. It is a great selling feature.
I doubt Savage is using 416R because none of their ads say a word about what SS they are using.
If they were using 416R, they would be bragging about it too.
I suspect their SS is 4140 or 4150, not 416R.
If they are using 416R, I would fire everyone in their advertising department for not using it as a selling feature.
Actually, 4150 was the 'go to' SS before 416R became popular, so I don't think having a 4150 barrel would be all that of a detriment.
Lots of ARs had 4150 SS barrels.
I went ahead and sent a query to Savage . They said 416. Didn`t specify 416 R.
4140 and 4150 are chrome/moly carbon steel alloys, not stainless. 416R is barrel-specific stainless and is the only suitable stainless alloy for barrel making.Originally Posted by CFJunkie
I was gonna say the same thing. CFjunkie... sorry, but hickorx2 is correct. Who told you 4140/4150 was Stainless? It's Chrome-moly(4140), and a Chrome-moly with a touch of Vanadium in 4150. Yes, 4150 is poar for AR15 barrels...as is 416R STAINLESS, like the barrel I'm currently using.
Dave and hickerx2
I stand corrected and appreciate the information. I also didn't realize the nuance of Chrom-moly and Chrome-moly vanadium.
It explains why in calculating exit time for a barrel, the reflection velocity of 4150 is listed at 19,969 fps and 416R is listed at 20,014 fps.
Never could understand why the velocity was a bit slower for 4140 and 4150 when the materials handbook says generic SS has a velocity of 20,000 fps.
Now I know.
By the way, if you are calculating exit time, the standard .3% carbon steel Savage barrels have a reflection velocity or 19,107 fps.
4140 is the old standby for barrel steel. It’s been used for many, many decades! 4150 was picked up after the BOOM of AR enthusiasts came on the scene. I was among the first; building AR’s right after the Clinton AWB expired in 2004. There were only a few AR barrel makers then... and the barrels were all 4140, either Chrome lined or not. As the years went on, the amount of Barrel makers BLEW UP! A result of course, of the masses of people flocking to build an AR. It was around 2008...2009, I started noticing more 4150-V on the scene. And of course Nitriding & Nitrocarburizing became the thing. I honestly believe from the researching over the years, it was a cost factor for the switch to 4150.
I just know that when my father-in-law priced some 4140 to make a receiver (he was a master machinist) he decided it would be not much more expensive to just buy an action. :)
He likely had to purchase at least a yard of material. It's similar for my custom Knifemaking. I make all my knives from VERY high priced, SUPER Steel. Crucible CPM3V & CPM20CV. These are CPM steels(Crucible Particulate Metal, also called Powder Steels). They are super high alloy/high speed steels that make 4140, and 416R look like Bisquick Batter, LOL! But it's the same when I'm grabbed my steel. Couple places I can get maybe a Foot or so, but most places it's sold by the yard.(36"-38"). And for what it is, yeah...4140 is actually pretty expensive. I was looking for some awhile ago for a project. But just ended up doing 1018 Cold Roll.
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