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Weldable AND heat-treatable steel

NS Dev - 8/1/07 at 12:51 PM

Not sure whether to put this in here or in the tools section, but (and I know I should not be asking this having worked for a steel company for years!! ) I am after a steel spec that is both weldable (in terms of stressed weld not cosmetic) and heat treatable, as in induction hardening for splines.

basically the same sort of steel used for front wheel drive car outer CV joint forgings, the bits that are splined and then friction welded to the CV cage.

I'm guessing they use microalloy steels for that job.

My first guess would be EN16 (817M40), anybody got any better ideas of something off the shelf?

Peteff - 8/1/07 at 03:12 PM

or is it called drill steel? It heat treats and friction welds.

gazza285 - 8/1/07 at 03:12 PM

http://www.roymech.co.uk/Useful_Tables/Matter/Strength_st.htm

MikeRJ - 8/1/07 at 03:36 PM

quote:
Originally posted by NS Devanybody got any better ideas of something off the shelf?

Don't know about off the shelf, but this document looks like it could be very useful for you.

NS Dev - 8/1/07 at 03:56 PM

all interesting but not much info on weldability.

I know this is mainly down to C and Cr content...........

I'll ave another look.

I know I have welded stressed bits of EN16 before, and I think it hardens up ok. EN24 is better yet but very high Cr content so not sure on the welding, think it will prob req. austenitc stainless wire to weld (which then makes me cross as my TIG lead won't reach the bloody lathe now will it!!! arrggggg!!! )

NS Dev - 8/1/07 at 03:58 PM

quote:
Originally posted by MikeRJ

quote:
Originally posted by NS Devanybody got any better ideas of something off the shelf?

Don't know about off the shelf, but this document looks like it could be very useful for you.

That confirms it - microalloy grades and other carburising chrome managanese steels, none good for welding there but some pretty close.

Phil.J - 8/1/07 at 04:28 PM

I've used EN24t in a number of places on my car and it welds very well, including the driveshafts which have the joint inner races welded on the ends and reliably transmit well over 200hp through ten inch soft slicks.
ATB
Phil

NS Dev - 8/1/07 at 04:34 PM

Aha!!! Brilliant news!!!!!!!!!!!!!!!!

That'll be strong enough to take a spline nicely too, and in the std "T" condition........hurrah!!!

Thanks indeed!!!

Perfect!!

Easy to get too!!!

thanks for the help

Incidentally, what rod did you weld it with and can one get away with migging it with standard wire? (I'm guessing not but much easier if I can!! )

novacaine - 8/1/07 at 05:16 PM