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How to Tell 400 Series SST from CRS?

How to Tell 400 Series SST from CRS?

How to Tell 400 Series SST from CRS?

(OP)
Gentlemen:

Is there a simple, shop based, test that can be used to
distinguish martinsitic SST (400 series) from CRS/Drill Rod?
Hopefully something on the order of grinding wheel sparks,
etc...

Thanks

The more you know, the more you
know you don't know....

RE: How to Tell 400 Series SST from CRS?

Dip it in 50% nitric acid. If SS, nothing much will happen. If carbon steel, lots of nasty bubbling and outgassing. Or, dip it a copper sulfate solution. Carbon steel will plate out copper right away, SS will not , or maybe do a little, depending on whether or not it was passivated.

RE: How to Tell 400 Series SST from CRS?

Use a magnet to distinguish between 400 series ferritic and martensitic stainless steels and austenitic, 300 series, stainless steels. 400 series are ferromagnetic (strongly attracted to the magnet).

RE: How to Tell 400 Series SST from CRS?

You can spark test, but it takes a good eye.  And I can't find the link to the pictures right now.
Acid is good quick test.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: How to Tell 400 Series SST from CRS?

(OP)
Gentlemen:

Thanks for the tips.  I will order some CuSO4 and
Nitric Acid for testing.  I have a number of bars
which could be 1030, 1045, 416, or 430, based on
receiving records.  The sawman cut off the color
codes....

Thanks again...

RE: How to Tell 400 Series SST from CRS?

If you have this kind of mix-up with material inventory, do yourself a favor and have a local chemical/metallurgical lab perform a chemical analysis. Chemical analysis costs between $50-$75 a sample, and it is well worth the price. You can't afford to be mixing even various grades of carbon steel in your inventory.

RE: How to Tell 400 Series SST from CRS?

I completely agree with metengr.  In your case, chemical analysis is a better option.

Rao Yallapragada

RE: How to Tell 400 Series SST from CRS?

An inexpensive alternative to chemical analysis is X-Ray Fluorescence sorting, possible with a hand held instrument on the whole stock.

http://www.welding-advisers.com/

RE: How to Tell 400 Series SST from CRS?

A handheld XRF won't tell you carbon.  Cut samples and have the lab run you Carbon and Chromium.  You can sort it out from there.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: How to Tell 400 Series SST from CRS?

Sorting can be done with eddy current devices after you have determined carbon and chrome.

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