The issue of the upper temperature limit for S30408 strain-strengthened studs
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According to Table 18 in 150, the allowable stress after strain strengthening is given; a lower limit of 50 degrees or less is specified. Since low-temperature impact testing is required at -100 degrees, the upper limit should presumably be at least 50 degrees. Why is 20 degrees the maximum allowable temperature in SW6? ? ?
The allowable stress is equal to the failure stress of the material, as appropriately adjusted after taking various influencing factors into account (the yield limit or strength limit in static strength design, or the fatigue limit in fatigue strength design), divided by the safety factor.
Since an allowable stress of 50 degrees is given, it proves that there are established experimental data available. What you say is correct, but it’s a bit off from the question I asked
I have the same question. Moreover, regulatory requirements stipulate that for containers holding liquefied petroleum gas, as well as media with extreme or high toxicity levels or moderate toxicity with strong permeability, special-grade high-strength fasteners must be used. If S30408 is not strain-hardened, can it not be used?