Yield Strength and Tensile Strength

Kempe's Engineers' Yearbook, any edition, gives tensile properties of various materials.

1 mpa = ksi

1MPa = 1N/mm2

please excuse my misprint in my last response.

1mpa = 0.1446 Ksi. yield is extension due to load and tensile strength is failure due to load.

1 MPa is equal to 1 Newton per sq-mm

tensile strength is equal to force per unit area

it is the force required to break the specimen

The yield strength or yield point of a material is defined as the stress at which the material begins to deform physically.

on the stress/strain curve for the material you can see the point at which the deformation starts taking place ,the load corresponding to that point will give you the yield strength and the load at which the specimen fails/breaks that will give the tensile strength

The yield strength or yield point of a material is defined as the stress at which the material begins to deform physically.

Don't you mean 'at which the material begins to deform plastically'? Prior to reaching the yield point, the material deforms elastically, i.e. stress is proportional to strain. Beyond the yield point, the stress/strain curve is no longer linear.

I think you meant it goes beyond elastic deformation and begins plastic deformation.

Could use mild steel S 355 J0 according to BS EN 10025 (also see BS 5950)

Yield strength: 355 MPa

Ultimate tensile strength: 440MPa.

What use do you intend?

Given mechanical properties can be complied not just by a structural carbon steel, but other steel types and even non ferrous metal alloys.

Mechanical properties are used to comply with design loads but chemical composition (material type) must be selected according to design environment.

Please, supply a bit more information

Kind regards