[TheForge] tool steel mark

[David E. Smucker]

Ron,  In my old day job we would just call these "chipping hammers", they 
where used a great deal for repair to the brick work in melting and holding 
furnaces.  In our case at the Davenport Works of Alcoa we used S5 for the 
tools and made them in house. (and resharpened them in house.)  This was 
because our corporate ferrous metallurgist liked S5 and we bought it by the 
ton for all of the plants on corporate purchase.  S5 is oil hardening and 
most folks use S7 for this application which is air hardening.  Sounds like 
air hardening works for you.
Some time in the mid 90's after I was out of the plant, the legal department 
decide that we should not make our own tools because of liability.  So they 
broke back the blacksmith in the plant to a machine shop helper and sent all 
of the work outside.  Good for someone on the outside but it cost more and 
they lost a good skill for a lot of other repair and straightening work. 
Just plan ass dumb.

Dave
----- Original Message ----- 
From: "Ron Swisher" <rwswisher at verizon.net>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Tuesday, April 26, 2005 8:58 PM
Subject: Re: [TheForge] tool steel mark


> Dave,  I've been treating it as air hardening steel.  Maybe hammer drill 
> is the wrong name.  I forged the blank into a shape that will be used for 
> chipping out old mortar between bricks.  I think this unit reciprocates 
> but do not think it rotates.  The guy restores old masonry.
>
>
> ----- Original Message ----- 
> From: "David E. Smucker" <davesmucker at hotmail.com>
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Tuesday, April 26, 2005 8:39 PM
> Subject: Re: [TheForge] tool steel mark
>
>
>> New to me, I have never see this, maybe an in house number.  By hammer 
>> drill do you mean a rotory hammer drill?  That being the case I would 
>> "guess" the steel is S1, S5, or S7.  S1 and S5 are oil hardening, S7 air 
>> hardening.  Cut a small sample and heat to a lemon yellow and let it air 
>> cool.  If it gets real hard then you most likely have a air hardening 
>> steel.  If not try this again but oil quench.  (S5 is not very common 
>> anymore, but a lot of S1 and S7 out there.)
>>
>> Good Luck,
>>
>> Dave
>
>
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