Overannealing issues in Stainless Steel ?

[Hercules28]

Does anybody knows what happens if I overanneal 304L SS?

Recommended temp is 2050 but what happens if I anneal at 2150?

Will there be some grain coarsening? Dimensional changes? Issues with corrosion? Something with Cr?

Any ideas or better bad experiences?

Thanks,

Herc

 

[metengr]

Usually, grain coarsening and slight reduction in RT mechanical strength properties below minimum published values.

 

[EdStainless]

It would be unusually for the yield or UTS to drop below spec. These are often much higher and there is a lot of room.
The material was cooled fast enough, right?

Are you going to form this material? I can't think of may ways that coarse grains will hurt. We used to anneal at 2100F as a standard practice, better weld microstructures.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

 

[Hercules28]

Yes the material was properly cooled and it is pretty thin too.
Agreed about the weld.

So no corrosion issues?

 

[metengr]

No.

 

[Metalhead97]

Hercules28,

Since your talking about 304L the sensitization effect will be minimal. Was the heat treating done in the atmosphere or a reducing atmosphere? Either way, instead of speculating just do a cross-section and look for any surface and intergranular reactions that might of taken place.

Metalhead