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RE: Stainless Steel

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The fundamental issue is that "A304" is an AISI designation, and not an ASTM. And there is no "A" in the 304 designation. As with most AISI designations, there is a required chemical composition, but AISI does not list physical properties. As you see by the posts, physical properties will vary. The physical properties will change with material size, treatment, and alloying techniques.

There are ASTM designations that include the 304 chemistry. I would suggest that you choose an appropriate ASTM designation with the 304 chemistry. In round stock you can choose from commonly available ASTM A276 or ASTM A479. I would suggest the A276. And is is referred to as a "Type" 304.

Open up the ASTM to A276 or ASTM A479, and you will see it all explained much better. Read the section on how to order, and contact a local supplier to see what type is commonly available. You will reasily see that the physical properties are a function of finishing and size of rod.

I would suggest ASTM A276, Type 304, Condition A, Hot Finished (75 ksi tensile, 30 ksi yield for all sizes of bar). Note, Type 304 is not readily weldable. For that you would need a Type 304L (70 ksi tensile, 25 ksi yield).

Also note that Type 304 is not that good for chloride resistance. It will pit. For chloride resistance, consider a Type 316.

Harold Sprague

From: "Jason W. Kilgore" <jkilgore(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: Stainless Steel
Date: Wed, 18 Aug 2004 10:22:02 -0500

Does anyone know the yield stress for an A304 stainless steel rod?  I
thought we had it in our library, but I can't find it, the people I would
ask are out.

I've got a situation with a bolt in bending (5.10 in-k) and tension (0.6 k).


Jason Kilgore

Leigh & O'Kane, LLC

Kansas City, Missouri

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