Stainless Steel 300 series

[FrancoisY]

Hello,

With Stainless Steel 300 series, are there much difference in material properties? with the increase in values (e.g. 301, 302, 303, 304, 305 etc.) what deciphers them for your needs. I do not have access to expensive websites or books. Any tips will help.


Thank you

 

[FrancoisY]

I am specifically looking at SS 303. How well this will do in HVAC system dealing with water. I know majority of SS being used in HVAC uses 304 or 316 grade.

 

[EdStainless]

303 has poor corrosion resistance because of the inclusions that are designed to improve machinability.
305 is designed to offer better formability.
Are you going to weld? If so then you need low C.
What product form do you need? Tube? Bar? Plate? Sheet?
It matters as not all of these alloys are available in all forms.
You can't get 303 tubing for example.

 

[FrancoisY]

303 has poor corrosion resistance because of the inclusions that are designed to improve machinability.
305 is designed to offer better formability.
Are you going to weld? If so then you need low C.
What product form do you need? Tube? Bar? Plate? Sheet?
It matters as not all of these alloys are available in all forms.
You can't get 303 tubing for example.

this is just a product I'm getting for HVAC. 305 can be tough to find. I would think 304 would be a good equivalent to 305?

 

[EdStainless]

How much forming are you doing?
Is this tubing?
Well annealed 304L should work.

 

[dvd]

Here is a nice publication related to stainless steel used in fans.

Stainless steel doesn't like chlorine, not sure what kind of water you are referring to.

 

[TugboatEng]

Deals with water? Is this a chilled water system? Ducting with wet air? Throw us a bone. If you put some thought into making the plastic to metal connections (no metal on plastic threads!), CPVC works remarkably well for chilled water systems.