As Dean said, a recent discussion
http://parkerguns.org/forums/showthread.php?t=32925
For the long version
https://docs.google.com/document/d/1...EK8OtPYVA/edit
Pre - WWI Parker “Titanic” barrel (courtesy of Dave Suponski) - AISI 1030 with low concentrations of nickel and chromium.
Pre - WWI Parker “Trojan” barrel (courtesy of Dave Suponski) - AISI 1035.
Pre - WWI Parker “Vulcan” (courtesy of Ron Graham) - AISI 1015.
Post-WWI Parker “Vulcan” barrel (courtesy of Dave Suponski) was AISI 1030.
“Parker Steel” was non-standard Acid Bessemer Resulphurized Rephosphorized AISI 1109 low carbon Steel.
None of those barrels were tensile tested.
The industrial standard for 1030 is 68,000 - 78,000 psi; but I recently tested an
Acier Cockerill 1030 that was 90,000 psi
https://www.doublegunshop.com/forums...&Number=599972
So cut me a chunk of Whitworth or Acme steel and I'll have it tested
