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Luders band

Luders band

Luders band

(OP)
We are testing large number of tensile specimen from a weld region.

Some specimen show luders band phenomena during tensile tests in this case what value for yield strength: upper, lower or the conventional 0.2% should be taken and why?

I was recommended to take the upper, but then in a series of tests, few specimens show an almost horizontal line for yield strength and in this case determining the upper yield strength is very difficult and I would prefer a standard 0.2% for all, will I be wrong in doing so?

I thank you in advance for replies,

Smiles,
Kanwer

RE: Luders band

You are correct to ask for the .2% offset yield strength to be used. It was developed exactly for the type of situation you are encountering.

RE: Luders band

(OP)
@swall...

Thanks for your reply, i too think it should be 0.2% for all..

Best Wishes
Kanwer

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