I tested the LRD-3 Aluminum air tank and it burst at 828 psi (57.1 bar).
Dry Mass: 2.34 kg (5.16 lbm)
OD: 7.271″ (18.47 cm)
Wall thickness: 0.097″ (2.46 mm)
Ultimate strength: 30,204 psi (208.2 MPa)
This ultimate strength is about 10% higher than what I computed for the 5 gallon tank, but still well below the 42 ksi UTS I’ve seen published for 5086-H116. I posted the entirety of the burst test video (burst occurs 2:09) so you can see the tank balloon as it is pressurized. The catalog diameter of the tank is 7″, but I measured a 7.271″ OD after the test; I neglected to measure the tank OD before the test. In retrospect, it worked in my favor that the UTS was lower than expected because my tester and pressure transducer are only good to 1000 psi.