Allowable helical torsional stress (hardened and tempered carbon

Not Reviewed
Equation / Last modified by mike on 2015/07/29 06:34
`S_y = `
Rating
ID
Carol.Allowable helical torsional stress (hardened and tempered carbon
UUID
05360a4d-d4ec-11e3-b7aa-bc764e2038f2

The tensile strength of spring steel may be found as:

`S_"ut" = A/d^m`, where A and m are uniquely defined for American National Standards Institute (ASTM) materials (see Notes Page):

    A232 - Chrome Vanadium
     A401 - Chrome Silicone

The allowable stress `sigma` then for a spring of hardened and tempered carbon and low-alloy steel is then given by this equation as:
 `S_y = sigma = 0.87 S_ut`

Notes

Tensile Strength Parameters A & mMaterialASTMmA
Music wireA2280.1632060
Oil-tempered wireA2290.1931610
Hard-drawn wireA2270.2011510
Chrome vanadiumA2320.1551790
Chrome siliconA4010.0911960