Static Coefficient of friction of polished stainless steel 1

[flashnchase]

Please let me know if anyone has the static coefficient of friction of stainless steel, polished. I would like to compare that to concrete for flooring used in one of our factories. So, a coefficient of friction for concrete is needed too for comparison.

Thanks!

 

[CoryPad]

What is moving against the polished stainless steel and concrete?

Regards,

Cory

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

 

[flashnchase]

Rubber or leather on shoes.

 

[CoryPad]

You should review the ASTM International standards on this subject, and perform your own testing. The equipment can be very simple, and provide much better information than we could.

http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/D2047.htm?L+mystore+otmn3951

http://www.kett.com/prod10.asp

http://www.chatillon.com/Our Products/Chatillon Force Gauge/forcegauge_intro.html

Regards,

Cory

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

 

[PeterCharles]

In cases like this I would ALWAYS carry out my own tests rather than rely on someone elses "published" information.

 

[handleman]

Since you're talking about a factory floor I would definitely include consideration for any contaminant on the floor. I would imagine that, for example, rubber shoes on either polished stainless or concrete would have a pretty high friction coefficient. Add a little bit of oil and the polished stainless is going to get mighty slippery. Concrete is going to vary quite a bit depending on its surface roughness.

 

[prost]

Your own tests with conditions closely simulating the real world application are the only way you'll even get close to a reasonably accurate friction coefficient. I am familar with aluminum. Published values are 0.3 to 1.0 and larger. In tests, with loads representative of the real world application, I saw friction coefficients from 0.4 to 0.9; the geometry had only tiny variations (surface roughness was consistent, the geometry dimensions of the two bodies in contact were the same for all tests) and the only variations were on the contact load applied to the opposing cylindrical pads, and the fatigue load of the test coupon (varied from 16 to 28 ksi). With such variations, it is almost a requirement to do your own tests if friction coefficient has a substantial effect on your design (it might be that varying from 0.4 to 1 has little effect of course).

 

[flashnchase]

Thanks to everyone for their input!
I actually found a research report that provides comparative coefficient of friction values for steel and concrete surfaces with differing roughnesses, and when the surfaces were wet and oily. The link to the report is:

http://library.kmitnb.ac.th/article/atc34/atc00136.html