Tensile and/or Shear Strength of AISI 12L15 Steel?

jlwhite

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Apr 30, 2001, 6:42:43 PM4/30/01

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Hello.

Can anybody tell me what the tensile and/or shear strength of AISI 12L15
carbon steel is? I can find data on AISI 1215, but not 12L15. My
understanding is that the "L" indicates that Lead is added to the
composition? What is the purpose of this addition, and what impact does it
generally have on the strength of a metal?

Any help would be much appreciated.

Thanks,
J. White

Bob K 207

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May 1, 2001, 1:21:57 AM5/1/01

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>Subject: Tensile and/or Shear Strength of AISI 12L15 Steel?
>From: "jlwhite

>
>Can anybody tell me what the tensile and/or shear strength of AISI 12L15
>carbon steel is? I can find data on AISI 1215, but not 12L15.

www.matls.com

> My understanding is that the "L" indicates that Lead is added to the
>composition?

Yes lead has been added.

> What is the purpose of this addition,

greatly improves machinability

> and what impact does it
>generally have on the strength of a metal?

if my memory is still good, strength imapct is minor

bogmaster

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May 1, 2001, 4:55:31 AM5/1/01

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The addition of lead makes it weaker and I believe less resistant to
fatigue failure. The magezine, "Home Shop Machinist" had a picture of
a very ruptured rifle barrel made from 41L40 instead of 4140 which
demonstrated this last point nicely.

Howard Bailey

BigBear

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May 1, 2001, 3:38:46 PM5/1/01

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Should have little or no effect on mechanical properties. The lead improves
machinability.

"jlwhite" <jlw...@hiwaay.net.nospam> wrote in message
news:terqial...@corp.supernews.com...

MaximGots

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May 1, 2001, 10:22:45 PM5/1/01

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ASM Metals Handbook v.1
p310 example about machining AISI12L13
(steel is resulfurized and rephosphorized in addition to be leaded) 12L13
has better machinability - no more information. Sorry.

"jlwhite" <jlw...@hiwaay.net.nospam> wrote in message
news:terqial...@corp.supernews.com...

Doug Milliken

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May 4, 2001, 12:11:55 PM5/4/01

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Years ago I looked into leaded steel for a project. From memory, it is
"cold short", which means that it is prone to brittle fracture.

Iirc (this was a long time ago), it is not a good material for structural
parts. Perfectly good for lightly stressed (screw-machined?) parts,
where the excellent machinability is a big advantage.

Ed McBride

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Oct 24, 2001, 11:53:58 AM10/24/01

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jlwhite <jlw...@hiwaay.net.nospam> wrote in message
news:terqial...@corp.supernews.com...

> Hello.
>
> Can anybody tell me what the tensile and/or shear strength of AISI 12L15
> carbon steel is?

Have you tried www.matls.com ?

Edward D. Vojcak

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Oct 24, 2001, 10:18:24 PM10/24/01

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> >
> > Can anybody tell me what the tensile and/or shear strength of AISI 12L15
> > carbon steel is?
>

1" cold finished 12L14 (or 12L15) TS = 69 ksi, YS = 60 ksi,
Shear Strength = 30 ksi (properties vary up to ą10% for chemistry and
bar size)

The 1200 series of steels are re-sulfurized and re-phosphorized and
are not typically made to mechanical properties requirements. To
develope mechanical properties best to carburized and heat treat -
realize though that the transverse fracture toughness would not be as
good as for say for carburizing and heat treating a straight low
carbon steels like 1010 or 1018.

Ed Vojcak PE