Annealed 4140

[stevec]

Great! 4140 that isn't, plus it's bent. Maybe a metal supplier WOULD be more trust worthy than a "sell-all" outlet like Enco.
Sometimes I'm glad access to Harbor Fright and Enco etc. is difficult
for us Canajuns.

[EdK]

(01-16-2013, 08:13 AM)stevec Wrote: Great! 4140 that isn't, plus it's bent. Maybe a metal supplier WOULD be more trust worthy than a "sell-all" outlet like Enco.
Sometimes I'm glad access to Harbor Fright and Enco etc. is difficult
for us Canajuns.

I don't normally purchase raw stock from Enco but did this time just to get my total up so I could get the free shipping. Sometimes free isn't free after all.

Ed

[Mayhem]

I must admit that it does look like the finish I get with 1018. I get a much nicer finish with 1040, even at my (slow) top speed, so I too am guessing that someone screwed up with your order.

It is a shame you cannot get a cheap and simple kit to test metal composition. I could probably take some shavings to our lab and tell them a patient ingested it but I would probably only get away with that once!

[EdK]

(01-16-2013, 09:55 AM)Mayhem Wrote: I must admit that it does look like the finish I get with 1018.

My thoughts exactly. That's why I think it's hot rolled, low carbon steel like A-36.

Ed

[Mayhem]

(01-14-2013, 03:46 PM)PixMan Wrote: Expert schmexpert. I hardly know more than the next guy about anything, I just had read a lot on magazine articles while on the throne. ;)

You must be super regular Ken! Perhaps a few less visits to the Mexican restaurant in Spencer. Mind you, the food was very good.

[bobm4360]

Ed:
If you need the strength of 4140, use "normalized" stock from a reputable supplier. It's harder than annealed, and turns better. Our shop used to buy 4140 "Pre-Hard", about RC35, and it turned nicely on a 12x36 grizzly with carbide, wet or dry. Just my $.02(that's tuppence for you guys that play with crickets!)

Regards,
Bob

[EdK]

(01-18-2013, 12:26 AM)bobm4360 Wrote: Ed:
If you need the strength of 4140, use "normalized" stock from a reputable supplier. It's harder than annealed, and turns better. Our shop used to buy 4140 "Pre-Hard", about RC35, and it turned nicely on a 12x36 grizzly with carbide, wet or dry. Just my $.02(that's tuppence for you guys that play with crickets!)

Regards,
Bob

Bob,

I don't NEED the strength of 4140 for the project I'm working on. I just chose to use it because I'd heard that it machines nicely and I've never machined any before so wanted the experience.

So there's annealed, normalized and pre-hard 4140? I've never seen normalized for sale at any of the online metal suppliers but I'll take another look. Thanks for the information Bob.

Ed

[f350ca]

Just ordered some 2 1/2 annealed to build a shaft on a log skidder. Will get a photo of the finish for you.

[EdK]

(01-18-2013, 08:42 PM)f350ca Wrote: Just ordered some 2 1/2 annealed to build a shaft on a log skidder. Will get a photo of the finish for you.

Greg,

That would be wonderful. Thanks man!

Ed

[PixMan]

I'd be happy to run some tests for photos and videos, but all I have is 1" square shank negative rake tooling, so you guys probably wouldn't get much benefit from that.

No 4140 rounds here either, just some 1117 and my 4140 is all square block drops from Burgon Tool Steel Co.