AISI 1045 is AISI 1045, with specific criteria, which is not "all over the map"
https://www.azom.com/article.aspx?ArticleID=6130"
similar to 1045" and "
non-standard 1045" means they don't fit the criteria for 1045...and are therefore not 1045. Not a hard concept William.
"Knowing the tensile strength of a particular Hunter Arms L.C. Smith OO Grade barrel isn't going to tell us much that we don't already know."
I believe establishing that the 1898 Armor specimen had a tensile strength of 101,000 psi is knowledge worth having, and reflects the large batch of tubes used in that time period.
The 1908 Armor specimen was a different (non-standard) 1018 steel. It is not unreasonable to assume that Hunter Arms, related to the Panic of 1907, after which they were forced to lower the prices of their guns significantly (the No. 00 went from $37 to $25), went with a lower quality ie cheaper barrel steel. Interesting to speculate, and again information with value.
Unfortunately, I don't have a 1920s Field grade Armor barrel study for comparison. Brophy's book has a 1929 engineering drawing specifying “Steel App. 40 Carbon” for the barrel; maybe the same non-standard AISI 1040 from
Laurent Lochet-Habran also used by Crescent. Ithaca also used Cockerill steel tubes from LLH.
It is also of value knowing Crescent apparently stopped using the previously documented decarbonized steel barrels and went with higher quality Belgian sourced carbon steel tubes (like the other U.S. makers) in the better economic times of the 20s. That alone does not make a Crescent a quality double.
Interesting isn't it? To me anyway, and it's my money.
BTW: I'm having trouble following you William. You are having trouble stringing sentences together that communicate a clear thought. Maybe try to establish ONE point/idea per post? And without misrepresenting/ twisting/removing the context of something I have posted.
I never said "that one or two samples of gun barrel steel tested by your local Metallurgy facility will tell us the story of all the barrels of that particular gun, produced over many years." I said, and believe, that a Hunter Arms Armor barrel analysis from a 1898 specimen would reflect the composition of other Armor Steel barrels for that time period. As shown above, things change over time however. We still would not know the composition of a 1898 Hunter Arms Crown or Nitro steel barrel.
Thanks.
