Stainless Stell for Srings

[Welchita]

Hi Fellows

Just looking for the best stainless steel choice for springs to perform medium and heavy duty. Please, any guidance will be very appreciated.

Does anybody knows any directory for the quimical and physical/mechanical stainless steels properties, any source, link, site?

Thanks a lot. Have a Good Year!
Welch

 

[israelkk]

http://www.engineersedge.com/spring_general.htm

http://www.rockfordspring.com/spring-material.htm

MIL-STD-29 avaiable at

http://assist.daps.dla.mil/

 

[EdStainless]

You should also look at the ASTM spec for stainless spring wire, A313 if I recall.

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[TVP]

Sandvik is a leader in producing stainless steel alloys for spring applications. Visit their website for more information:

http://www.smt.sandvik.com/

 

[EdStainless]

you could also contact a wire company such as;
National Standard
Bradford
Techalloy
Bekaert

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[swall]

At this point your request is too generic for anyone here to provide a useful answer. There are a wide variety of stainless and high alloy wire materials for a variety of applications. All depends on what you want--corrosion resistance, strength, elevated temperature resistance, cryogenic performance, non magnetic properties, etc.

 

[Welchita]

Hello Folks!

You are rigth, SWALL!
I'll get together all the data and post it on tomorrow.
Thank you all so much.
Kind regards,
Welch

 

[Welchita]

Hi!
Good Morning!
Here I am to give all the information I have at the moment:

- The specific equipment is mechanical seals in stainless steel (except grafite rings) are to be used with centifigal pumps for textile and chemical industries. These kind of seals use a stainless steel spring to keep a constant pressure on the grafite rings to perform the sealing function;
- The pressure range goes from 0 to 16 bar ;
- The temperature range goes from -30 to 220 ºC (-4 to 428 ºF);
- Some data about chemical environment:
* This particular seal works in a dyeing machine circuit at 170 ºC (338 ºF) with a pH = 4,5 to 5 (acid range) and with pH = 6,5 to 7,0 (neutral to basic range) at 120 ºC (248 ºF) in presence of hypochloric salt solution.

Remains the question: Which the adequate, the best compromise of stainless steel for the spring? Any kind of steel pós-treatment?

You can ask me for more conditions, I will try to get them later.
Thanks a lot.
Kind Regards,
welch

 

[swall]

I think your hypochloric environment is going to force you into Hastelloy C-276 or Elgiloy. BTW, what stainless materials are used for the other parts of the system?

 

[TVP]

Is the "hypochloric salt solution" in the form of sodium hypochlorite (NaOCl)? If so, then titanium and zirconium are the only metals that have substantial resistance, especially at elevated temperatures. High performance nickel alloys like Alloy C-276 (Hastelloy is one tradename, but others like Carpenter and Special Metals also produce it) have also shown low corrosion rates at 20 C, but somewhat increased rates at elevated temperatures: 1.2 mm/year at 65-95 C vs. 0.23 mm/year at 20 C [data from ASM Handbook Volume 13].

 

[EdStainless]

Often Ni-Cr-Mo alloys (C-276, C-22, 59, 686 and so on) are used for this type of service. They are not imune to corrosion in this service, but they are very durable.

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[Welchita]

Hi FOLKS!
To SWALL: I'm suppose to use stainless steel are AISI 316 and AISI 316L.
To TVP: That's correct, NaOCl !
Thanks.
welch