Fbry and Fbru for nickel aluminum bronze
Fbry and Fbru for nickel aluminum bronze
(OP)
Can anyone point me to a reliable source for bearing properties for nickel aluminum bronze (QQ-C-465, Alloy 642, Mil-B-6946, or AMS 4640) as used in NAS (76,77,537,538) bushings?
I have a rule of thumb for these numbers but no firm documentation.
Thanks.
Joa
I have a rule of thumb for these numbers but no firm documentation.
Thanks.
Joa





RE: Fbry and Fbru for nickel aluminum bronze
For alloy 642 the values are vary with bar diameter as follows:
upto 0.5" bar diameter uts=80 ksi and yield=40ksi
0.5" to 1" bar diameter uts=75 ksi and yield=37.5ksi
1" to 3" bar diameter uts=72 ksi and yield=35ksi
over 3" bar diameter uts=70 ksi and yield=30ksi
RE: Fbry and Fbru for nickel aluminum bronze
Wouldn't this be too conservative and result in the bushings being very bearing limited in many instances?
Just for comparison with a material that I do have numbers on (Mil-H-5)... Copper Beryllium Per AMS 4651 has tensile vs bearing values of 180 vs 306 in ultimate and 145 vs 225 in yield. This is quite a bit of difference and can really influence a design.
Anybody ran across hard numbers for this material?
RE: Fbry and Fbru for nickel aluminum bronze
RE: Fbry and Fbru for nickel aluminum bronze
Regards