Yes, some TCA's use CRES but not the 2 LR-105's I had, they were magnetic
which stainless is not but pure nickel is. Only 4 metal elements are
magnetic.
There's a lot of misinformation out there, I wouldn't have either unless I
actually touched/owned the hardware and tested it. The injector is magnetic
too and is also pure nickel, one of Rocketdyne's favorites after copper.
K
On Tue, Aug 4, 2020 at 10:25 AM Nate Downes <downix2k@xxxxxxxxx> wrote:
Guess the doc I've got is wrong. It lists the tubes for the nozzle and
chamber as silver soldiered CRES
On Tue, Aug 4, 2020, 10:22 AM roxanna Mason <rocketmaster.ken@xxxxxxxxx>
wrote:
No CRES steels at all, the LR-105, which I owned 2 of with injectors, was
silver brazed nickel tubes in a double pass cooling circuit with a nickel
injector plate and Aluminum LOx dome. A TEA/TEB ignition port integral to
the injector.
The F-1 was made from Inconel because they needed the extra strength at
the expense of lower conductivity so had to use Nioro to braze the tubes as
silver wouldn't wet properly in the furnace.
K
On Tue, Aug 4, 2020 at 6:24 AM Nate Downes <downix2k@xxxxxxxxx> wrote:
I don't know the lr-101 for se, but the LR-105 uses -347 for any
component that will be exposed to LOX and 4130 for the parts which don't,
due to having near identical thermal properties. Add to that the high
silver brazing they used which has the same thermal profile, and the -105
had very good heat handling properties. Quite possible the -101 is the same
or similar.
On Tue, Aug 4, 2020, 4:31 AM Jonathan Adams <jonadams2002@xxxxxxxxx>
wrote:
Someone told me arocket had the highest density of Rocketdyne LR-101
owners on the internet, so I figured this would be the best place to ask
about what kind of steel alloy(s) the engine uses.
I read somewhere that the LR-101 was made from austenitic CRES-347,
while another said it was made from chrome-moly 4130 steel. Does the engine
use both?
I understand 347 is probably the better option for cryogenics, as mild
steels generally don't take well to that, but the 4130 has thermal
conductivity that the stainless steel doesn't. It's hard to pin down any
answer...
Thanks!
