S235 Steel: Tension/Pressure & Bending Values

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The discussion centers on the interpretation of values associated with the S235 steel type, a low carbon structural steel defined by the European Standard EN 10025. The values provided, expressed in N/mm², indicate tension, pressure, and bending capacities, with ranges suggesting maximum design stresses or possibly fatigue-related parameters. The yield strength of S235 is approximately 235 MPa, with ultimate tensile strength (UTS) ranging from 340 to 470 MPa. The 'plus or minus' notation implies variability in these measurements, likely related to fatigue limits. The conversation seeks clarification on the format of the original data table and the significance of the ranges presented.
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In a table of different steel qualities the information about a perticular type of steel can be as follows:

Steel type:
S235

Tension/Pressure:
0\pm60
130\pm130

Bending:
0\pm190
150\pm150

My question is, what do these values tell me? The values are in N/mm^2
 
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While I'm not sure I understand what the numbers themselves represent, the approximate value of the quantities seems to be comparable to typical values for steel in MPa, which is the same as N/mm^2.

So, my guess is YES.
 
What is the format of the table form where these numbers originate?

S235 is a conventional low carbon structural steel (European Standard EN 10025)

Grades are:
S235
S235JR
S235J0
S235J2G3
S235J2G4

Yield strength should be about 235 MPa, UTS about 340-470 MPa.

The maximum numbers may be maximum design stresses, but it is hard to tell. The numbers are given as ranges.
 
I'd guess similarly to design stresses or then something more exotic, like allowable stress amplitudes in fatigue.
 
PerennialII said:
I'd guess similarly to design stresses or then something more exotic, like allowable stress amplitudes in fatigue.

Yeah, the 'plus or minus' seems to suggest fatigue related parameters.
 
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