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AMS 355 5743J - What is it?

AMS 355 5743J - What is it?

AMS 355 5743J - What is it?

All I can find is:
"Steel, Corrosion and Heat Resistant, Bars and Forgings 15.5Cr 4.5Ni 2.9Mo 0.10N Solution Heat Treated, Sub-Zero Cooled, Equalized, and Over-Tempered"
AMS (Aircraft Materials System?) is outside of my long experience with materials. The interweb also seems not to be well acquainted.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: AMS 355 5743J - What is it?

The AMS specs are Aerospace Material Specifications that are issued under the SAE purview. They are actually very common (I get more testing for AMS specs than ASTM/ASME, for example) and are specified well beyond the aerospace industry. You worded in a funny way but what you are asking about is AMS 5743 Rev. J, which is the current revision for the standard. The spec notes this is "similar to" (they always use that wording) Type 355 stainless steel (UNS S35500).

One final comment: Mil Specs transitioned into AMS specs. You may want to check the AMS specs first if you need the current version of the Mil Spec or if you cannot find it as a Mil Spec.

RE: AMS 355 5743J - What is it?

Thanks for the replies. I had a little more success last night with google. The key was locating the UNS number and a trade name, Pyromet 355 (no longer in use?)
An interesting alloy to be sure.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: AMS 355 5743J - What is it?

Name Pyromet 355 is still in use, at least at Carpenter internally. This is a very interesting alloy, that can be hardened by martensitic transformation and/or precipitation hardening, and cold work as well. Heat treatment can be complicated (hardened by double aging, or sub-zero cool and temper, or equalize and over-temper, depending on which it can have a martensitic or a austentic structure.

Carpenter has been making a lot, offering mainly bar form in either the annealed or in the equalized and over-tempered condition.

It has been used for gas turbine compressor components.

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