Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old May 13th 20, 04:22 AM posted to rec.crafts.metalworking
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Default Case hardening question


I'm working on a Savage .17 HMR for a neighbor , and he's lost a part
.. The spring clip that retains the firing pin , extractor , and
"cartridge guide" has broken and the guide piece is lost - and I haven't
been able to source one to replace it . The spring is on order from
Numrich as soon as they can get their doors back open it should be on
the way . The guide is basically a mirror image of the extractor , and I
have one 90% complete , but I'm wondering if I need to case harden it .
I have the stuff , but have one question about post-hardening heat
treatment . Where this is a thin layer of hard over a soft core , I'm
wondering if I just need to heat , dip in the Kasenite , reheat to red
heat and quench , or do I need to temper it after hardening . Or even if
I need to harden it at all , It's not under a lot of stress , and the
only metal to metal contact will be with brass cases . This is a very
small part , about .060" thick by .140" wide and about an inch long .
--
Snag
Yes , I'm old
and crotchety - and armed .
Get outta my woods !

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Old May 13th 20, 05:18 AM posted to rec.crafts.metalworking
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Default Case hardening question

On Tue, 12 May 2020 22:22:59 -0500, Snag wrote:


I'm working on a Savage .17 HMR for a neighbor , and he's lost a part
. The spring clip that retains the firing pin , extractor , and
"cartridge guide" has broken and the guide piece is lost - and I haven't
been able to source one to replace it . The spring is on order from
Numrich as soon as they can get their doors back open it should be on
the way . The guide is basically a mirror image of the extractor , and I
have one 90% complete , but I'm wondering if I need to case harden it .
I have the stuff , but have one question about post-hardening heat
treatment . Where this is a thin layer of hard over a soft core , I'm
wondering if I just need to heat , dip in the Kasenite , reheat to red
heat and quench , or do I need to temper it after hardening . Or even if
I need to harden it at all , It's not under a lot of stress , and the
only metal to metal contact will be with brass cases . This is a very
small part , about .060" thick by .140" wide and about an inch long .


You probably did, but did you check with Brownells? They have some
Savage parts.

--
cheers,

John B.

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Old May 13th 20, 08:04 AM posted to rec.crafts.metalworking
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Default Case hardening question

On Wed, 13 May 2020 11:18:55 +0700, John B.
wrote:

On Tue, 12 May 2020 22:22:59 -0500, Snag wrote:


I'm working on a Savage .17 HMR for a neighbor , and he's lost a part
. The spring clip that retains the firing pin , extractor , and
"cartridge guide" has broken and the guide piece is lost - and I haven't
been able to source one to replace it . The spring is on order from
Numrich as soon as they can get their doors back open it should be on
the way . The guide is basically a mirror image of the extractor , and I
have one 90% complete , but I'm wondering if I need to case harden it .
I have the stuff , but have one question about post-hardening heat
treatment . Where this is a thin layer of hard over a soft core , I'm
wondering if I just need to heat , dip in the Kasenite , reheat to red
heat and quench , or do I need to temper it after hardening . Or even if
I need to harden it at all , It's not under a lot of stress , and the
only metal to metal contact will be with brass cases . This is a very
small part , about .060" thick by .140" wide and about an inch long .


You probably did, but did you check with Brownells? They have some
Savage parts.

I'f think case hardening would extend it's life. The soft core would
give it strength. Generally case harfened parts are used "as is" or
"as treated".
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Old May 13th 20, 01:12 PM posted to rec.crafts.metalworking
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Default Case hardening question

On 5/12/2020 11:18 PM, John B. wrote:
On Tue, 12 May 2020 22:22:59 -0500, Snag wrote:


I'm working on a Savage .17 HMR for a neighbor , and he's lost a part
. The spring clip that retains the firing pin , extractor , and
"cartridge guide" has broken and the guide piece is lost - and I haven't
been able to source one to replace it . The spring is on order from
Numrich as soon as they can get their doors back open it should be on
the way . The guide is basically a mirror image of the extractor , and I
have one 90% complete , but I'm wondering if I need to case harden it .
I have the stuff , but have one question about post-hardening heat
treatment . Where this is a thin layer of hard over a soft core , I'm
wondering if I just need to heat , dip in the Kasenite , reheat to red
heat and quench , or do I need to temper it after hardening . Or even if
I need to harden it at all , It's not under a lot of stress , and the
only metal to metal contact will be with brass cases . This is a very
small part , about .060" thick by .140" wide and about an inch long .


You probably did, but did you check with Brownells? They have some
Savage parts.

--
cheers,

John B.


Yup , and their selection of Savage parts does not include this one .
--
Snag
Yes , I'm old
and crotchety - and armed .
Get outta my woods !
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Old May 13th 20, 01:14 PM posted to rec.crafts.metalworking
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Default Case hardening question

On 5/13/2020 2:04 AM, Clare Snyder wrote:
On Wed, 13 May 2020 11:18:55 +0700, John B.
wrote:

On Tue, 12 May 2020 22:22:59 -0500, Snag wrote:


I'm working on a Savage .17 HMR for a neighbor , and he's lost a part
. The spring clip that retains the firing pin , extractor , and
"cartridge guide" has broken and the guide piece is lost - and I haven't
been able to source one to replace it . The spring is on order from
Numrich as soon as they can get their doors back open it should be on
the way . The guide is basically a mirror image of the extractor , and I
have one 90% complete , but I'm wondering if I need to case harden it .
I have the stuff , but have one question about post-hardening heat
treatment . Where this is a thin layer of hard over a soft core , I'm
wondering if I just need to heat , dip in the Kasenite , reheat to red
heat and quench , or do I need to temper it after hardening . Or even if
I need to harden it at all , It's not under a lot of stress , and the
only metal to metal contact will be with brass cases . This is a very
small part , about .060" thick by .140" wide and about an inch long .


You probably did, but did you check with Brownells? They have some
Savage parts.

I'f think case hardening would extend it's life. The soft core would
give it strength. Generally case harfened parts are used "as is" or
"as treated".


That's what I thought , but it never hurts to check with folks that
heave more experience with this sort of thing .
--
Snag
Yes , I'm old
and crotchety - and armed .
Get outta my woods !


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Old May 13th 20, 03:21 PM posted to rec.crafts.metalworking
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Default Case hardening question


On 5/12/2020 8:22 PM, Snag wrote:

I'm working on a Savage .17 HMR for a neighbor , and he's lost a

part . The spring clip that retains the firing pin , extractor , and
"cartridge guide" has broken and the guide piece is lost - and I haven't
been able to source one to replace it . The spring is on order from
Numrich as soon as they can get their doors back open it should be on
the way . The guide is basically a mirror image of the extractor , and I
have one 90% complete , but I'm wondering if I need to case harden it .
I have the stuff , but have one question about post-hardening heat
treatment . Where this is a thin layer of hard over a soft core , I'm
wondering if I just need to heat , dip in the Kasenite , reheat to red
heat and quench , or do I need to temper it after hardening . Or even if
I need to harden it at all , It's not under a lot of stress , and the
only metal to metal contact will be with brass cases . This is a very
small part , about .060" thick by .140" wide and about an inch long .


I would make parts like that out of spring steel. I've got a small
sheet I bought from McMaster 15years ago that is hardly smaller than
when I bought it that has made a bunch of parts over the years.


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Old May 15th 20, 02:07 AM posted to rec.crafts.metalworking
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Default Case hardening question

Am Mittwoch, 13. Mai 2020 16:21:45 UTC+2 schrieb Bob La Londe:

I would make parts like that out of spring steel. I've got a small
sheet I bought from McMaster 15years ago that is hardly smaller than
when I bought it that has made a bunch of parts over the years.


How thick is that spring steel from McMaster, and how do you cut it to size?

Thanks!

Chris



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