Torque for axle banjo and torque tube bolts

[Dennis Nicholas]

I would advise not to use stainless bolts regardless, they have less  tensile strength and elasticity than steel bolts and also tend to stretch or elongate/also prone to fracture.
Best to stick with H/T steel bolts on a stressed component like a axle center..
The comments about torque settings previous  hold. use a short ring spanner judiciously.
Cheers Steve

I believe the original bolts were high tensile grade R.
I have been looking around many websites hoping to find a comparison table to show the tensile strength, yield strength, and proof strength. BUT all tables seem to be in such a variety of differing units my poor old brain cell can't cope.(even different types of tons/tonnes/short and long tons/metric tons!!!)
However What I seem to have found is:
(1Mega Pascal MPa = 1N/mm squared = 145 psi

A2-70 =700 MPa = 700Newton Meters squared = 101,000 lbf/in squared. (psi)
R = 45 - 55 ton/in squared....using 50 and short ton (2000pounds)= 100,000 psi
S = 50 - 60 ton/in squared....using 55   ,,    ,,     ,,       ,,              =  110,000 psi

So it would appear that the A2-70 is not far off the tensile strength of the "R" bolts.
(also when you think that a Centurion tank used to weigh around 50 tons then that weight on a square inch is a fair old strain that the bolt can take.......so the proof load (load before permanent deform happens) would seem to be adequate??
Since there are 8 bolts round the banjo I am now visualising 8 Centurion tanks happily hanging off the banjo!!!!
I shall retire now for a pint of something strong to cool the brain cell.

Perhaps I have got it all wrong??    Has anyone seen a table that compares the various standards in comparable units?

Dennis.