In Reference to the thread Proof st

[reddy3]

In Reference to the thread Proof stress vs yield stress

I have the same issue"I see “proof stress 0.2% & 0.1%” in a MTR. What’s the relation between them and yield stress? Can I compare them with min Y stress in the Section II and pass the material?"

I read the messages in thread, one of the answer was 0.2% of proof strength is equal to 0.2% of Ys.
I didnt get this in my MTR it says "Rp0.2 (N/mm2) - 254
"Rp1.0 (N/mm2) - 295
The material spec is SA312 TP304L. As per code the min yield strength is 170Mpa(N/mm2). Could anyone help me out please. I couldn't understand this

 

[EdStainless]

In the US we take Yield strength as being the stress value at a 0.2% offset.
In Europe it is common to report at both 0.2% and other elongations.

Your Rp0.2 is the Yield Strength.
Your material exceeds the required minimum so it is fine.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

 

[metengr]

To answer your question, proof stress @ 0.2% is the yield strength in international system of units at 0.2% offset strain, or at 0.1% offset strain, if measured.