Friction angles for materials

[Madmexx]

I need to design a tube 16" in which following materials will be transported : Aluminium blocks, wooden blocks, sand.

There is limited space to place the tube so i need the minimum angle under which the tube has to be placed.

Therefor i need the friction angles for those materials.
The tube is a steel tube.

In general i am interested in a list of properties of materials on the internet so i will be able to have an easy acces.

Greetz

 

[plasgears]

Are they tabulating friction angles now? I believe friction angle is the arctan mu, the coeff of friction. Look for coeff's in the handbooks, and make ref to clutch mfrs, who generally use this information.

 

[Madmexx]

Thx for replying.
Problem is they dont have any handbooks on such matters here....
So i have to find my own way. Hence my question for information on the internet.