## Calculating Shear Strength of a Material?

## Calculating Shear Strength of a Material?

(OP)

How do you calculate for the Ultimate Shear Strength of a Material?

I have a SS416 heat treated at 800 (From Machinery Handbook) and now has:

Yeild Strength: 150000psi

Ultimate Tensile Strength: 195000psi

Hardness: C41, 390Bhn

One book says:

Ult. Shear Strength = 0.57 x Material Yield Strength

Machinery's Handbook says:

Ult.Shear Strength = 0.50 x Ult. Tensile Strength

They are both close in terms of results but which one if at all?!

I have a SS416 heat treated at 800 (From Machinery Handbook) and now has:

Yeild Strength: 150000psi

Ultimate Tensile Strength: 195000psi

Hardness: C41, 390Bhn

One book says:

Ult. Shear Strength = 0.57 x Material Yield Strength

Machinery's Handbook says:

Ult.Shear Strength = 0.50 x Ult. Tensile Strength

They are both close in terms of results but which one if at all?!

## RE: Calculating Shear Strength of a Material?

I would use the 0.5xUlt.Tensile strength

regards

desertfox

## RE: Calculating Shear Strength of a Material?

## RE: Calculating Shear Strength of a Material?

For round bar in shear (as used in the ESDU MMDH) anything up to 0.7 times may be achieved.

Examining MIL-HDBK-5, which has a mixture of shear test methods, with quite a lot of punch shear through sheet, 0.6 times is sort-of-usual.

-RP.

## RE: Calculating Shear Strength of a Material?

The Maximum Distortion Energy Theorem shows that shear stress is approximately 0.577 that of normal yield strength. I've found this to be highly accurate comparing computed to laboratory results.

Kenneth J Hueston, PEng

Principal

Sturni-Hueston Engineering Inc

Edmonton, Alberta Canada

## RE: Calculating Shear Strength of a Material?

## RE: Calculating Shear Strength of a Material?

want to use this. Do you want the part

to shear as in a shear pin or do you want it

not to shear.