quote:

Originally posted by Eagle One:
Several manufacturers are using BAR nomenclature. Here are some units and conversions:

1 BAR = 100,000 N/m^2 = 100,000 Pascals (Pa).

Since F=ma, and Newton (N) is a unit of force, we get, in the metric system N = kgm/s^2.

kilogram (kg) is a unit of mass.

Now, 1 BAR = 14.5038 psi and 1 psi = 0.06894747 BAR.

Correctly, 2200 BAR = 31,908.4 psi.

I teach thermodynamics and checked for HST pressure. Not defined in any of my thermo or mechanical engineering books. But, H is enthalpy, S is entropy, and T is temperature.

Finally, a steady diet of 32,000 psi. Only 92 psi more than approx 31,908.4 psi. All manufacturers build in a factor of safety (FS) in their product. You'll never find out what it is unless you can get to the closely held proof data. All that said, what is your confidence in Baikal? Let's say for arguments sake, their FS is 1.25 which gives us a yield or failure value of 39,85.5 psi. When designing buildings in my structural engineering mode, I aim for a FS not less than 1.5...go figure.

I have talked with people who shoot Sabatti .45-70 DRs and they are using Garrett 420 grain bullets at 35,000 psi with, as they claim, no damage..so far.

Opinion only and not to be construed as professional advice...32,000 psi seems OK.

Eagle One, MSE, PE
Professor of Chemistry, Physics, Thermodynamics, Mathematics