304 Stainless Rod

[JStructsteel]

Got a cut sheet for A304 stainless rod. The It has ".2YS" and UTS. I am taking UTS as ultimate tensile strength, but what is the .2YS? Im taking it as my yield strenght, but why the .2YS?

 

[dhengr]

Jstructsteel:
The .2YS probably means the Yield Strength at a .2% strain offset, a fairly common set point for yield strength in these kinds of steel. But, verify this with your steel supplier. The yield strength should be about 40% of the ult. str.

 

[EdStainless]

Yes, it is sloppy shorthand for 0.2% offset. While that is std in the US overseas you often see 0.4% or 0.5% reported also.
If this is straight 304 (not "L") and it is annealed the minimum properties should be 30ksi/75ksi.
(I'll add that up to 45/90 are actually fairly common in annealed 304)
There are specs for cold finished rod that are stronger than that.

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P.E. Metallurgy, consulting work welcomed

 

[JStructsteel]

Thanks. Its says 304/304L
Round bar, annealed, cold draw.
.2YS is 73.85ksi, UTS is 97.20

 

[dik]

0.2ys = 73.8ksi seems to be a tad high...

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[GC_Hopi]

73.8 ksi is not unreasonable considering the ultimate is 97.20 ksi. Here is a snip from AISC DG 27. I highlighted the portions of interest. Maybe the material is dual certified and that is why is is so much higher then the minimum for 304 or you got 304 duplex.

 

[dik]

Thanks Hopi... I thought for a 0.2% offset, it was...

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Tomfh]

Stainless steels don’t tend to have a clearly defined elastic limit. In practice 0.2% strain is often taken as the yield point.

 

[Settingsun]

You can get Grade 500 (MPa) 304 reinforcing bar. The rod in question may be made by a similar process, so the specified 0.2% stress isn't out of the question. Sometime the non-magnetic properties are important so not dual certified with magnetic grades.

 

[EdStainless]

This is cold worked material, so the strength will be above typical.
There should also be a specified minimum tensile elongation.
It will be somewhat magnetic.
There are references to property very similar to your numbers.
304/304L/304N Relatively severe cold work 25.4mm – 31.75mm 690 Mpa min 545 Mpa min 24% min
This is from a random web site.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed