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aluminum allowable fatigue stress - semi range?

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jeffking

jeffking

Marine/Ocean
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Hello,

The CSA code S157 for welded aluminum has a fatigue range chart with values for "semi-range". Is the semi-range chart the same as a standard AWS chart for fatigue range, or is the CSA semi-range only half range. For example category F, ten million cycles, has a value of 5mPa (725 psi). Is this half of the stress range or the full stress range?

thanks, Jeff
 
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