Friction coeff. between Al 6061 and 440C Steel
Friction coeff. between Al 6061 and 440C Steel
(OP)
Hi,
I have no. 2 440 C steel fasteners being used to fasten a aluminum flange. I've found one value for aluminum on soft steel (dry) equal to about .61.However, 440C i would not consider a soft steel. Also, Does it matter which one is the fastener? Thanks for your help.
I have no. 2 440 C steel fasteners being used to fasten a aluminum flange. I've found one value for aluminum on soft steel (dry) equal to about .61.However, 440C i would not consider a soft steel. Also, Does it matter which one is the fastener? Thanks for your help.





RE: Friction coeff. between Al 6061 and 440C Steel
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Friction coeff. between Al 6061 and 440C Steel
If the aluminium is anodized, I would guess the value could even drop as low as say 0.2
Regards
G
RE: Friction coeff. between Al 6061 and 440C Steel
RE: Friction coeff. between Al 6061 and 440C Steel
In general, is it an okay assumption that the fastener/washer/surface interface is equal to the steel fastener/aluminum interface?
RE: Friction coeff. between Al 6061 and 440C Steel
h
It is not a valid assumption that a stainless steel fastener head rotating against a steel washer surface will have the same friction coefficient as the stainless steel threads rotating against aluminium threads. If there were a lubricant, then it would more valid.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Friction coeff. between Al 6061 and 440C Steel
Applicable data about friction coefficients are not always easy to find; of course some are published in good mechanical design handbooks.
RE: Friction coeff. between Al 6061 and 440C Steel
assembly to prevent corrosion of the different material
interfaces? Paint will act as a lubricant.
RE: Friction coeff. between Al 6061 and 440C Steel
RE: Friction coeff. between Al 6061 and 440C Steel
Please don't post questions while either not knowing or withholding crucial facts.
RE: Friction coeff. between Al 6061 and 440C Steel
Do you have any control over the finish of the aluminium? An anodize surface drastically reduces the friction coefficient.
Tightening screws on a painted finish make a mess of the paint. I have no experience with plating.
JHG
RE: Friction coeff. between Al 6061 and 440C Steel