What do the tension, pressure and bending values mean for S235 steel?

[TSN79]

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 $$N/mm^2$$

 

[Gokul43201]

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.

 

[Astronuc]

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.

 

[PerennialII]

I'd guess similarly to design stresses or then something more exotic, like allowable stress amplitudes in fatigue.

 

[Gokul43201]

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.