SA-182 F316L and F316
SA-182 F316L and F316
(OP)
Can anyone explain why the allowable stresses for F316 are higher than F316L in SA-182? It appears that above 850'F, 316L is not suitable wheras 316 has allowable stress up to 1500'F.Other than the low carbon content in the L grade, I see no difference in the composition.





RE: SA-182 F316L and F316
for comparison look at the numbers for 316H.
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Plymouth Tube
RE: SA-182 F316L and F316
That is the dual certified 316/316L.
One reason that today's L grade will make straight grade mechanical properties is because of a little bit of N in the alloy.
While the nitrogen is a good strengthener at low temp it does not raise creep strength as much as C would.
This is why you are only allowed to use H grades (with min C) in creep limited applications.
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Plymouth Tube
RE: SA-182 F316L and F316
Example -
G12 At temperatures above 1000°F, these stress values apply only when the carbon is 0.04% or higher on heat analysis.
RE: SA-182 F316L and F316