testing for 303 ss
testing for 303 ss
(OP)
I am looking for a quick test for 303 SS.
I know about sulphuric acid and photo paper.
I wondered if there was anything more convenient than that.
I bought a piece of "304" round bar. I am just getting a little suspicious ( or paranoid.) because of the way it is turning on the lathe.
B.E.
I know about sulphuric acid and photo paper.
I wondered if there was anything more convenient than that.
I bought a piece of "304" round bar. I am just getting a little suspicious ( or paranoid.) because of the way it is turning on the lathe.
B.E.





RE: testing for 303 ss
Do not try to smell the container the HCl is in.
I'm trying to remember whether the HCl was concentrated or a 50/50 mixture with water. We should get some help from some others on this.
This has to done in fume hood or outside.
There are some materials like Project 70 that machine very well in a lathe. Even though 303 is listed the other materials machine quite well.
http://www.cartech.com/machining_zone/index.html
RE: testing for 303 ss
I will try the HCI test on Monday when I go back to work.
The thing that is driving my suspicion, is that this material is turning a lot better than I thought 304 or 304L should.
B.E.
RE: testing for 303 ss
Be sure to degrease the SS before putting into nitric.
RE: testing for 303 ss
I have not finish turned the part yet. I took a roughing cut, and as I mentioned to Unclesyd It was turning far better than I am used to seeing on 304.
I do not have Nitric in house. I have Phosphoric, Hydrochloric and Sulphuric.
The other thing that is driving this paranoia is that the finished part has to be welded to another 304 part.
RE: testing for 303 ss
RE: testing for 303 ss
I was actually wondering if berkshire has 202 in his hands for a long time. Hence I posted a general discussion on 200 series stainless steel.
RE: testing for 303 ss
If it were me, I would check chemistry also.
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RE: testing for 303 ss
I will do a sulphur check today, I guess the other thing I can do is take a sample and weld it and see if I get hot shortening.
If I do not get a clear answer I will go back and buy more material with certs The first piece came without certs.
B.E.
RE: testing for 303 ss
I did unclesyd's Acid test today, no smutting, no rotten egg smell. The only unusual thing I noticed was that the Hcl turned pale green. I also did the Sulphuric acid/ photo paper test, no indication of sulphur.
I also cut off a small piece and welded it to a piece of 304L then folded the piece 90 degrees one way then back to straight with no cracking at the weld joint.
Whatever this is I like it. Again thank you for the help.
Arunmrao
Isn't type 202 17-4 type stainless?
B.E.
RE: testing for 303 ss