18-8 stainless steel designation 2

[Tunalover]

Can someone help settle an argument? I work with a guy who swears that specifying "18-8 Stainless Steel" is sufficient to control the alloys used in fastener manufacture and to insure alloys with yield points of 30ksi and higher. My argument is that "18-8" is such a broad designation that it will allow alloys with lower yield points and really doesn't "nail it down" well enough. I maintain that you need to state the alloy (e.g. 304 SST) and governing specification. How about it?


Tunalover

 

[CoryPad]

You are correct, the "guy" could not be more wrong.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[EdStainless]

If you care about the results you need to buy material to a specification. Use a generally recognized one like ASTM or EN. You may find that bar made to a dozen different specs will work fine for you, if so list them all.
If you are going to buy to specs follow a couple of simple rules.
Buy copies of each one.
Read them, know the differences (is testing required? size tolerance? documentation requirements?)

If you want to use ASTM then JOIN. You don't have to attend meetings, just vote electronicly. You can abstaine on everything, but you will know what specs are being changed. You also get a free volume with your membership. This costs less than just buying the book.

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Corrosion never sleeps, but it can be managed.

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