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> Calculating Yield Strength
Guest_David Karran_*
post Sep 18 2002, 08:39 PM

How to calculate yield stength of material i.e 80k/95k from test piece results after running PQR?
Dr Weld
post Oct 2 2002, 10:56 PM
Joined: 23-Sep 02

First of all, you only get a yield point with ferritic material (and less common metals that behave similarly to ferritic steel). Stainless, nickel and aluminium alloys don't show yield and you have to calculate a proof strength.

For Yield Strength, your test house should have measured the dimensions of the tespiece so you can work out the cross sectional area. They should also have made a trace of load and extension during the tensile test. This plot will rise on a straight line then will show a sudden drop before climbing once more on a curve. The point of sudden drop is the yield point. Note the load at which this occurs, divide by the cross-sectional area in mm2 and you get the Yield Strength.
post Jan 26 2009, 09:46 PM
Joined: 26-Jan 09

Could anyone help???

Is yield strength the same as yield stress?? Also, how to calculate Yield load.

Yield stress units MPa how to convert to Yield load units KN???

Thanks unsure.gif
Poacher Turned G...
post Jan 27 2009, 08:18 AM
Joined: 15-Nov 05


In a nutshell yes.

1 Mpa is equal to 1 n/mm2 (squared) therefore to convert Mpa multimly by 1000
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