Yield Strength and Other Near-Elastic Properties - Materion
https://materion.com/-/media/files/alloy/newsletters/technical-tidbits/issue-no-47---yield-strength-and-other-near-elastic-properties.pdf
The 0.2% offset yield strength (0.2% OYS, 0.2% proof stress, R P0.2, R P0,2) is defined as the amount of stress that will result in a plastic strain of 0.2%. This is illustrated by the blue line in Figure 1 below. This is the yield strength that is most often quoted by material suppliers and used by design engineers. If a
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