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How to determine whether metal is 316 or 316L?

How to determine whether metal is 316 or 316L?

How to determine whether metal is 316 or 316L?

(OP)
We have a XRF alloy analyzer, but it is insenstive to carbon.  Is there a simple test to measure carbon content that we can run to determine if a material is 316 vs 316L, or 304 vs 304L?  We need to identify metals at incoming inspection and on our shop floor.
Thanks for your ideas!

RE: How to determine whether metal is 316 or 316L?

For this level of material identification, you need a quantitative chemical analysis to determine carbon content. You have two options;

 - either send out a small sample of each shipment of material that is received in your shop to a metallurgical lab for chemical analysis OR
 - consider purchasing a desktop emission spectrometer for your company. There are web sites that advertise these devices including the example shown below;

http://www.angstrom-inc.com/2500page.html

If your volume of testing is sufficient, it may be worthwhile to investigate purchasing this device.

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