quiet steel 1

[mendadent]

ford,gm,and chrysler have used "quiet steel" in dashes,cowls, plenums,engine components etc. but does anyone have information of the laminated metal being used in exterior shhet metal as in doors,hoods,trunks?

 

[GregLocock]

Doubt it, the spot welds look very ugly.

I've seen that stuff being pushed for 25 years, it has its place, it is no panacea.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[NickE]

Also the requirements for a class A exposed paint surface might not be possible with the laminated sheet. It seems to me that drawing (stamping) properly to get a nice surface would be out of the question.

 

[mendadent]

thanks men.

 

[dkelly]

Laminated steel and plastic was popular for a while on things like rocker covers and oil pans (remember those) So yes it does have deep draw capability. But as Greg mentioned the spot welds tended to look ugly. You basically had to squeeze the material hard enough that the steel made contact through the plastic and then it would carry current. My guess as to why it is not used in exterior sheet metal is the added weight and cost.

danno

 

[mendadent]

thanks dkelly

 

[Rob45]

There is also little reason to use "Quiet Steel" for exterior panels, since the desired effect, i.e., absence of vibration, can pretty effectively be done with either stick-on visco-elastic damping sheet, or spray-on materials.

BTW, I have used "Quiet aluminum" from MSC for floor sheet in a Class 8 truck cab, on a prototype basis, and found only a very small reduction in sound transmission through the floor, due to the lack of a coincidence peak in the material. It didn't jsutify the increased expense and somewhat greater difficulty in fabrication.

Regards,
- R

 

[mendadent]

thanks rob45