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cragar
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Is stainless steel magnetic?
Physics_Kid said:yes, all materials are "magnetic"
cragar said:Do you consider photons to be a material , do photons have a magnetic moment?
ok so i see there is no cut an dry answer to my question .
cragar said:what do you mean by ferro magnetic
strong magnetic field will bend light.cragar said:Do you consider photons to be a material , do photons have a magnetic moment?
ok so i see there is no cut an dry answer to my question .
Physics_Kid said:strong magnetic field will bend light.
A magnetic field doesn't bend light (there is a quantum effect where photons can convert into electron/positron pairs that are effected by a magnetic field)cragar said:is the magnetic field bending the light or the gavitational field made by the magnetic field bending the light.
mgb_phys said:A magnetic field doesn't create a gravitational field
cragar said:The associated particle with the magnetic field is the photon right ?
so a magnetic field creates no gravity at all ,
do photons create gravity.
are magnetic fields affected by gravity.
danneva said:According to the book that I’ve read stainless steel are very broad group of metals. The advantage of stainless steels over plated steels is that, if scratched or damaged, the steel will ‘self-repair’ as new oxide layer is formed. In general, the higher the proportion of chromium, the stronger the corrosion resistance of the steel. as for whether they are magnetic, the answer is that it depends. There are families of stainless steels with different physical properties. A basic stainless steel has a ‘ferritic’ structure and is magnetic. These are formed from the addition of chromium and can be hardened through the addition of carbon (making them ‘martensitic’) and are often used in cutlery. However, the most common stainless steels are ‘austentic’ – these have higher chromium content an dnickel is also added. It is the nickel which modifies the physical structure of the steel and makes it non-magnetic.
I used austenetic stainless (SS304, as I recall) in a piece of equipment that was cooled to about 4 kelvin. Somewhere between room temperature and 4 kelvin, it switched from fcc to bcc, and in the process became magnetic, and in addition the dimensional change from fcc to bcc was sufficient to crush a ceramic insert (vacuum seal) that was hard-soldered to the SS304.vanesch said:Actually, it is the crystal structure of the iron that makes it magnetic or non-magnetic (ferro, that is). Ferrite (alpha-iron) is body-centered cubic (bcc) and is magnetic ; austenite (gamma-iron) is face-centered cubic (fcc) and is non-magnetic. .
Bob S said:I used austenetic stainless (SS304, as I recall) in a piece of equipment that was cooled to about 4 kelvin. Somewhere between room temperature and 4 kelvin, it switched from fcc to bcc, and in the process became magnetic, and in addition the dimensional change from fcc to bcc was sufficient to crush a ceramic insert (vacuum seal) that was hard-soldered to the SS304.
Bob S
Bob S said:I used austenetic stainless (SS304, as I recall) in a piece of equipment that was cooled to about 4 kelvin. Somewhere between room temperature and 4 kelvin, it switched from fcc to bcc, and in the process became magnetic, and in addition the dimensional change from fcc to bcc was sufficient to crush a ceramic insert (vacuum seal) that was hard-soldered to the SS304.
Bob S
Yes, I am sure. It happened many times while cooling superconducting magnets to 4.2 kelvin, until I switched from SS316 to a coaxial connector with a ceramic dielectric using a cupro-nickel alloy.MagnetDave said:Are you sure that it was the cold? I've seen it before in cryo systems that the strain from the forming process caused the phase transition, but I've never heard of it happening from cold alone. It's very interesting if that's the case, and I'd like to talk in about it in more detail.
Bob S said:Yes, I am sure. It happened many times while cooling superconducting magnets to 4.2 kelvin, until I switched from SS316 to a coaxial connector with a ceramic dielectric using a cupro-nickel alloy.
Bob S
Above 9 kelvin.MagnetDave said:Any idea what the transition temperature was?
cragar said:does ferro mean conating iron , you pretty much i mean will a magnet stick to it
my chem teacher told me that iron ,cobalt, nickel and liquid oxygen would be affected by a magnet.
vanesch said:Wow, fun
I suppose this came about because of too large a "thermodynamic stress" (the colder you get, the more the austenitic phase is out of equilibrium). On the other hand, one would also guess that the colder, the slower all kinetics, so I didn't know it was possible to have such a phase transition at low temperatures.
The answer to this question is not a simple yes or no. Some types of stainless steel are magnetic, while others are not. This is because the magnetic properties of stainless steel depend on its chemical composition and the manufacturing process used.
Most austenitic stainless steels, such as 304 and 316, are non-magnetic. However, ferritic and martensitic stainless steels, such as 430 and 420, are magnetic due to their higher levels of iron and carbon content.
Yes, it is possible to make stainless steel non-magnetic by altering its chemical composition or through a process called annealing. Annealing involves heating the stainless steel to a high temperature and then cooling it slowly, which changes its microstructure and reduces its magnetic properties.
The magnetic property of stainless steel can affect its use in certain applications. For example, in industries where magnetic fields are present, non-magnetic stainless steel is preferred to avoid interference. In addition, magnetic stainless steel can be used in applications where its magnetic properties are beneficial, such as in magnetic resonance imaging (MRI) machines.
You can test the magnetic properties of stainless steel using a magnet. If the stainless steel is attracted to the magnet, then it is magnetic. However, if it is not attracted, it does not necessarily mean it is non-magnetic as some types of stainless steel can have weak magnetic properties that are not easily detected with a magnet.