The Washer hardness vs the Nut or the Bolt hardness

[magdy3m]

What are the advantages or disadvantages due to using a washer with hardness higher than specified in a certain application
EX: using Washer with 410 HV10 (its Sp. Value : 250 to 380 HV10) with bolt 360 HV10 & nut 280 HV10 ( 1st Case )
or using washer 200 HV10 with the same bolt and nut ( 2nd Case )

 

[Ron]

If in a static application, it makes no real difference. If in a dynamic application, higher hardness might lead to cracking, depending on the application.

 

[rb1957]

do you want the washer to crush under the preload or do you want to deform the part (under the washer) ?

generally washer are sacrifical ...

another day in paradise, or is paradise one day closer ?

 

[bridgebuster]

perhaps we should have a philosophy forum?

Since we can only see 3 dimensions and physicists tell us there are more than 3 dimensions, we can argue that paradise is in our midst, except we can't see it.