301 SST magnetic in full hard condition?
301 SST magnetic in full hard condition?
(OP)
A QC person where I work was using the magnet test to determine if a washer supposedly produced from 301 SST was non-magnetic. I find that there is a 37-45 Rc hardness requirement that can only be achieved in the full hard condition. Am I correct in thinking that the material will be at least slighly magnetic in this state?
BCK
BCK





RE: 301 SST magnetic in full hard condition?
Your concern on hardness is independent with magnetism.
RE: 301 SST magnetic in full hard condition?
"Magnetic Permeability
Properly annealed Type 301 is completely austenitic
and magnetic permeability is 1.02 maximum at 200H.
Cold working promotes the formation of martensite
and the magnetic permeability is increased. The
amount of martensite formed depends on the amount
of cold rolling, temperature of cold rolling, and
composition. Figure 1 shows the increase in magnetic
permeability with cold rolling at room temperature."
Directly from the Allegheny Ludlum Blue Sheet on 301
http:/
To see the graph.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: 301 SST magnetic in full hard condition?
RE: 301 SST magnetic in full hard condition?
RE: 301 SST magnetic in full hard condition?
This is not a good process though since minor shifts in chemistry will shift the temp required.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube