[TheForge] tool steel mark

[David E. Smucker]

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
----- Original Message ----- 
From: "Ron Swisher" <rwswisher at verizon.net>
To: <theforge at mailman.qth.net>
Sent: Tuesday, April 26, 2005 8:19 PM
Subject: [TheForge] tool steel mark


I found the mark DA46 on a tool steel hammer drill "blank".  Anyone know if 
this refers to type of steel?  I can not find anything on A46.  I do not 
think it is an error for A36.
Thanks, Ron
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