|
 |
|
 |
| Notices |
Welcome to the new PGCA Forum! As well, since it
is new - please read the following:
This is a new forum - so you must REGISTER to this Forum before posting;
If you are not a PGCA Member, we do not allow posts selling, offering or brokering firearms and/or parts; and
You MUST REGISTER your REAL FIRST and LAST NAME as your login name.
To register:
Click here..................
If you are registered to the forum and keep getting logged
out: Please
Click Here...
Welcome & enjoy!
To read the Posts, Messages & Threads in the PGCA Forum, you must be REGISTERED and LOGGED INTO your account! To Register, as a New User please see the Registration Link Above. If you are registered, but not Logged In, please Log in with your account Username and Password found on this page to the top right.
Hi Unregistered,
On July 29th, this site will be moving..! No, really - it's "moving" to another physical location - including servers, gateways, routers - everything - including my coffee cup...
So, from the date of July 29th through July 30 or 31 (shooting for these dates, but - as always, I'm at the mercy of my ISP who has to install the lines to the new location - and we actually get them running ;) ). But - this site, cloud servers and main web will be OFF LINE.
Now, please save these dates!! Please - don't be "that guy" who emails me on the 30th to tell me you "can't open the Parker Website". I'll already know it is offline - and also know that you are "that guy"...
I'll take this notice up and down over the next week or so - and leave it up during the final few days before shutting it off on the 29th..
John D.
|
 |
06-18-2014, 05:27 PM
|
#1
|
Member
|
|
|
Member Info
|
Join Date: Sep 2011
Posts: 6,947
Thanks: 3,587
Thanked 14,448 Times in 3,764 Posts
|
|
Quote:
Originally Posted by Mark Conrad
So an extra set of barrels for an A1S was $250 and an extra set for a VH was $25. And, they were the same barrels less the engraving. Wow, you can see where the profit was.
|
Mark, the highest grade Dave had available for analysis was Titanic, so I wouldn't make the assumption Acme and Peerless were necessarily the same specification.
|
|
|
|
 |
|
 |
06-18-2014, 05:55 PM
|
#2
|
Member
|
|
|
Member Info
|
Join Date: Sep 2011
Posts: 6,947
Thanks: 3,587
Thanked 14,448 Times in 3,764 Posts
|
|
I'd like to add a thought that has been bothering me since Dave first called me to discuss the results he had gotten back.
It wouldn't be necessarily correct to make the assumption, based upon the chemistry alone, that the lower grade barrel steels were essentially the same, or fell within the same specification.
Part of the process in making steel is achieving the chemical analysis of the melt, while still in the furnace, so that it meets that portion of a specification. Another equally important portion of the manufacturers ability to meet a specification is to also heat treat the material so that it meets the physical requirements. These requirements, at a minimum, include Yield Strength, UTS (Ultimate Tensile Strength) Elongation, and Reduction of Area. These requirements are determined by heat treating with the product, a test bar from the same melt, then machining the test bar to the requirements of one of the several profiles used in Tensile Testing Machines. Varying the temperatures of heat treatment, and the method of cooling from those temps, can make one material, whose chemistry meets a plain scoop of vanilla, to a butterscotch sundae, with whipped cream, nuts and a cherry.
Our larger melt furnaces had capacities of 40,000 lbs. When the furnaces were tapped, into a ladle (hung from a 50 ton overhead crane) garden variety castings were regularly poured from the same heat as propulsion turbine cases for GE Steam Turbine. one casting may have a selling price of $2.50/lb, and another, $10, or more. There is a lot that goes into the processing of steel beyond simply meeting a chemical analysis.
Its unfortunate Dave didn't have samples of a sufficient size to also do physical testing.
|
|
|
|
The Following User Says Thank You to edgarspencer For Your Post:
|
|
|