[TheForge] Cheese is cold-short!

Sat Mar 2 13:37:42 EST 2019

Several rifle barrel makers had failures especially in cold with sulphuric steels.  The leaded steel have also been used by rifle makers and failed.  For blackpowder they are ok.  Recently someone here in Dallas dumped a hundred 2” by 10’ 41L50 bars for $10 a stick.  I ended up with a couple, but no more because of the issues.  The “L” means leaded and you will find shops that run screw machines and big Warner Swassey turret lathes have truckloads if it.  There are spec sheets out there for almost all steels that will tell you what the iron is alloyed with and what the properties are.

Charles

Sent from my iPad

> On Mar 2, 2019, at 12:14 PM, Ron Childers <ron at munlaw.net> wrote:
> 
> German tanks broke in WWII because of the sulfur content in the steel exposed to sub-freezing temperatures in Russia
> 
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Dave Smucker
> Sent: Saturday, March 02, 2019 11:59 AM
> To: Blacksmithing List Sponsored by ABANA <theforge at mailman.qth.net>
> Subject: Re: [TheForge] Cheese is cold-short!
> 
> Even with chip breakers these steels with sulfur and also lead really improve high speed machining.  For many products this is very big cost saving.  These steels don't forge well, nor do they weld (arc) well either.  Locally we can get free drops from a company making items for Snap On but it not worth working with even if it is free.  Most of these steels I have seen are sold as bar stock for use in high speed machine centers or screw machine lathes.
> 
> Dave Smucker
> Brasstown, NC
> 
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net <theforge-bounces at mailman.qth.net> On Behalf Of Bruce .
> Sent: Saturday, March 2, 2019 11:39 AM
> To: newenglandforge at aol.com; Blacksmithing List Sponsored by ABANA <theforge at mailman.qth.net>
> Subject: Re: [TheForge] Cheese is cold-short!
> 
> Ya learn something every day.  Basically they're introducing a defect in the steel so the chips break off more easily!? Seems to me there'd be better ways.  I thought that was what chip breakers (on lathe tools) were for.
> Bruce
> NJ
> 
>> On Sat, Mar 2, 2019 at 7:59 AM Michael via TheForge < theforge at mailman.qth.net> wrote:
>> 
>> Sulfur is most often an intentional addition to steel(s), and not a 
>> friend of blacksmiths.  Sulfur, which you can think of as dirt, is 
>> added to help when "machining" steel, as it helps the chips breakup 
>> and not leave that long stringy chip.  Mike SchermerhornBoston
>> 
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