Welding 304 stainless, yield strength in heat affected zone

[jlauzon]

Hi, I have not dealt much with stainless weldments. What yield strength can be expected to be left in the heat affected zone of my welded joints? I need these numbers for calcs on a stainless frame I am designing that will have a small picker crane on top. Thx!

 

[metengr]

The good news is that for austenitic stainless steels, like 304, these are non-hardenable grades by heat treatment. Assuming the stainless steel is in a solution treated condition, the HAZ would exhibit nearly the same YS values as solution treated base material.

 

[MikeHalloran]

The bad news is that the YP is pretty low, like 25 ksi, relative to CS, usually 36 ksi or more.


Mike Halloran
Pembroke Pines, FL, USA

 

[EdStainless]

But at least it is the same yield that was used in the design.
Many grades have a 30ksi min yield, and they typically come in 35-45ksi for actual properties.

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P.E. Metallurgy, Plymouth Tube

 

[Duwe6]

Did anyone use a WPS - qualified Weld Procedure Specification?? The PQR - procedure qual coupon will have given that datum.

 

[weldstan]

The UTS is all that is required to be recorded on the PQR. The YS may be eroneous due to the influence of deposited weld metal.

 

[MikeHalloran]

If you design to 'typical' or 'measured' YP, expect to get an angry phone call not long after a lot with 'minimum' YP arrives.



Mike Halloran
Pembroke Pines, FL, USA