ss or cm ?

M

mike in co

Guest
i getting my ducks in a row for 300 win mag 1000yd rifle. krieger, but ss or cm? i know that ss is used for its better machining properties, but the cm is tuffer... my thinking is better throat life...shooting 210s at 2800-3000 fps..

and profile ?? ...17 , 14 or ?? 28 to 30 inches( just stop at 28 , or pay for the 30 ?)

thanks
mike in co
 
since you have chosen krieger, shoot them an email and ask them. from everything ive read and who'm ive talked too, most barrel manufacturers give SS the edge in barrel life.
 
Hmmmmmmmmmmm... I am under the impression stainless resists throat erosion better than chrome moly... ???
 
Dennis,
I think you're right. CM is harder, and tough, but if you take a cutting torch to a piece of stainless it's harder to get it to start cutting than it is CM. I figured that to mean stainless was more erosion/fire resistant. "Course I could be wrong.
 
Kent

The 416R that most Rifle barrels are manufactured from is quite a bit easier to machine than 4140, (chrome moly). As a Machinist, I do not quite understand what you mean by Stainless Steel being more difficult to get a tool cutting........jackie
 
Jackie I think Kent was saying SS is harder to cut with a cutting torch (not a tool bit) than CM. Therefor the throat might last longer with SS.

Hal
 
What kind of cutting torch are you using while trying to torch cut stainless steel???
 
RStiefel said:
What kind of cutting torch are you using while trying to torch cut stainless steel???
Click to expand...

Plasma and arc air.:D


I have read several different barrel makers claim that SS has a slight edge over CM for throat erosion. I think you can read the same on Lilja's web site?

I've never been able to gas cut SS, but then I gave up and went to and air arc, and later a plasma cutter, when they got cheaper.
 
Well Big Al

you need to come into the modern world. The word "torch" was used. And yes you can torch cut Stainless Steel. It's done with powder. I fabricate and install custom turbo piping 3-4 times each week. I cut most of it with a wet saw, but some with the powder. With an air arc, you aren't cutting stainless, you are melting it. Same holds when trying to cut stainless with oxygen and acetylene. You will do nothing more than melt it.
 
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RStiefel said:
you need to come into the modern world. The word "torch" was used. And yes you can torch cut Stainless Steel. It's done with powder. I fabricate and install custom turbo piping 3-4 times each week. I cut most of it with a wet saw, but some with the powder. With an air arc, you aren't cutting stainless, you are melting it. Same holds when trying to cut stainless with oxygen and acetylene. You will do nothing more than melt it.
Click to expand...

actually they all...just melt the metal...

mike in co.
 
guys,
this is why i ask these questions, and why i ask them here,
ss it is and thanks.

mike in co
 
RStiefel said:
you need to come into the modern world. The word "torch" was used. And yes you can torch cut Stainless Steel. It's done with powder. I fabricate and install custom turbo piping 3-4 times each week. I cut most of it with a wet saw, but some with the powder. With an air arc, you aren't cutting stainless, you are melting it. Same holds when trying to cut stainless with oxygen and acetylene. You will do nothing more than melt it.
Click to expand...

Actually you aren't melting when cutting with a torch. That is why most stainless will not cut with an O/A torch. What you are doing is heating the steel to the point when raw oxygen hits it that it will start a rapid chemical reaction (oxidizing aka rusting). Stainless, aluminum, etc will not readily rust so you can't cut it with a torch. At one time I remembered the Chemical equations to show such.

However, I have always read and been told that SS holds up better than CM.
 
Rapid oxidation is the words used in the Welding Technologies Handbook and the process is as you describe.

Gee dragging up memories from 40 years ago class room study, I can hear the brain straining. Sounds like I need some brain lube. Hard to do when you gave up booze.
 
Gentleman, I apologize. I should have stated oxy/acteylene torch. I didn't mean to cause such a fuss. For the record, I like stainless and the way it machines.
 
mike in co said:
i getting my ducks in a row for 300 win mag 1000yd rifle. krieger, but ss or cm? i know that ss is used for its better machining properties, but the cm is tuffer... my thinking is better throat life...shooting 210s at 2800-3000 fps..

and profile ?? ...17 , 14 or ?? 28 to 30 inches( just stop at 28 , or pay for the 30 ?)

thanks
mike in co
Click to expand...
Your question is asking for machining quality comparison. 4140 is 65%, 416 ss is 90% (consider leaded cold rolled steel as 100%). As to overall utility as a rifle barrel, no argument, 416ss.

Pay attention Owens!!
 
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Yes sir Mr. Sharrett. I apologize for the confusion.

What I was trying to say in a roundabout country boy way is this:
It you take a piece of stainless and a piece of CM and hold an oxy/acetylen torch to them both which will start cutting first. I'd guess it to be the CM. To a dumbass lke me, that tells me the CM will erode faster in a rifle throat. After all, the burning propellent gases are gasses, or are they? I thought so Seems kind of logical. Then someone throws in plasma cutter, and EDM, laser, star trec particle beam cutter or whatever!! It's a show.

I give up, I just don't know any more......again I apologize to all.
 
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Kent Owens said:
Yes sir Mr. Sharrett. I apologize for the confusion.

.
Click to expand...

Hey Kent we can't all be perfect!!

I was up to Kettelfoot earlier. Would you believe there were rimfire shooters at the 60 bench range in the snow. We could turn that thing around and make a cheekin house out of it!!!!
 
Kent Owens said:
Yes sir Mr. Sharrett. I apologize for the confusion.

What I was trying to say in a roundabout country boy way is this:
I give up, I just don't know any more......again I apologize to all.
Click to expand...


Pal, you don't need to apologize to this brainless ape. Machining comparison between different steels has absolutely nothing to do with properly machined and finished final product.Rad
 
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