where to get 41xx bar stock

**dnepro-mike** · 06-17-2012, 05:46 PM

Originally Posted by KMS

How fast do you need it?

And how long do you need it to be?

not fast, by the end of the year maybe.
the length is 350mm

I don't know what kind of receiver you are building, or how complicated it is, but what kind of machining capabilities do you have? If you have access to a full machine shop and can use carbide tools then you can get a piece of pre-hardened 4140. If you are doing it without a milling machine and good tooling than you best get an annealed piece of 4140 that may or may not need to be heat treated when you are done. I say 4140 because it is an all around good quality steel that is readily available and can be heat treated if necessary.

there is considerable amount of machining so i'd rather go with annealed. also i'm planning to use mix of HHS and carbide.

I have BF20 class hobby mill that i'm planning on using.

**Rob Boudrie** · 06-17-2012, 05:48 PM

I say 4140 because it is an all around good quality steel that is readily available and can be heat treated if necessary.

How would you say it compares to 4340?

**mike93lx** · 06-17-2012, 07:25 PM

try onlinemetals.com

**Fixxah** · 06-17-2012, 07:38 PM

Turner Steel in Bridgewater.

**Boris** · 06-17-2012, 08:03 PM

Originally Posted by Fixxah

Turner Steel in Bridgewater.

they only deal in mild steel products, good selection, but it's all mild shit. I asked.

It's pretty friggin hard to find anything that's not mild steel. I called many companies around Boston, many don't even stock steel they sell. I was looking for non-mild-steel sheet metal and it's an impossible find.

You may be better making contact and ordering from China. I kid not. US does not produce steel anymore.

**flintoid** · 06-18-2012, 12:53 PM

Originally Posted by Rob Boudrie

How would you say it compares to 4340?

not as good, but cheaper. 4340 can be heat treated at higher temperatures successfully. And after heat treat, it is a tougher steel that has a higher fracture resistance. As a direct result of this mechanical characteristic, it has a better hardness at lower temperatures than 4140.

It's more expensive, though. Saying that a firearm receiver needs 4340 over 4140 would be a stretch... unless you're shooting space aliens on Mars in sub zero temperatures all day long while holding stresses associated with a .308 locking bolt.

**EC1** · 06-18-2012, 01:23 PM

You Might try Castle metals in Worcester, MA.
http://www.castlemetals.com/contactUS.aspx

**Rob Boudrie** · 06-18-2012, 06:45 PM

Saying that a firearm receiver needs 4340 over 4140 would be a stretch... unless you're shooting space aliens on Mars in sub zero temperatures all day long while holding stresses associated with a .308 locking bolt.

Or running a 1911 factory where the philosophy is basically "no compromise" and "if you have to ask the price, you probably can't afford it". I know a few folks on NES have guns from this place.

**KMS** · 06-18-2012, 06:58 PM

I can get just about anything,but I have the ability to have it delivered,I had a customer that wanted 8 inches of Brass 2" roundstock to turn on a lathe...I had to buy 12 inches from the supplier and now have a 3" paperweight as I didn't want to charge the guy for it and he wanted it exactly 8 inches.

**beaker** · 06-18-2012, 09:14 PM

4340 has a little more carbon and molybdenum. 4140 will be a little easier to machine, 4340 can be through hardened. I doubt you would see much of a difference but 4340 could certainly also be used for a receiver.

Originally Posted by Rob Boudrie

How would you say it compares to 4340?

where to get 41xx bar stock

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