Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Donate Today!

Do you enjoy these
technical forums?
Donate Today! Click Here

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

cthompson68 (Mechanical) (OP)
27 Apr 09 11:46
What is the material typically used in creating leaf springs for consumer parts? Is it 17-7 PH stainless steel, 316 S.S., or some other steel material?

Specifically, I have seen leaf springs used on portable garage door openers that mount under the visor in a car, and the sheet metal is approx. 030" thick. What are the best low cost material options (good quality) for manufacturering a leaf-spring for a similar consumer type product.

I have been working more with plastics lately, so I would appreciate helpful suggestions. A material that is currently available (defined) in Cosmos (SolidWorks simulation) is preferred for creating an FEA study.
desertfox (Mechanical)
27 Apr 09 14:33
Hi cthompson68

Have a look at this site:-

http://www.roymech.co.uk/Useful_Tables/Springs/Springs_Materials.html

desertfox
cthompson68 (Mechanical) (OP)
27 Apr 09 16:44
Thanks for the reply. A similar application are battery mounting clips (http://www.keyelco.com/products/prod41a.asp?SubCategoryID=8), which are nickle-plated spring steel.

Although it does not specify the extact spring steel material, this resource provides some options:

http://www.spring-makers-resource.net/spring-steel.html
http://www.spring-makers-resource.net/support-files/materials_cross_reference_summary.pdf

Given the variety of materials, which one is better suited for a sheet metal leaf spring design of approximately .030 inches thick material?
MiketheEngineer (Structural)
27 Apr 09 16:51
Leaves??  Just had to say that
desertfox (Mechanical)
27 Apr 09 16:56
Hi cthompson68

Really it depends on a number of things:-

1/ life of required spring

2/ load and deflection of spring and frequency of operation

3/ Any temperature or hostile enviroment the spring might
   be subjected too.

to name but a few, also if your putting it up against sheet steel then I would use a carbon spring steel and stay away from say brass or bronze because if they contact steel with moisture present you may incurr galvanic corrosion.

desertfox
EdStainless (Materials)
27 Apr 09 17:46
carbon steel with enough coating or platting to give you the corrosion resistance that you need.
Steels are strong and stiff (high modulus), this lets you put a high spring force into a fairly small package with good fatigue life.

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

cthompson68 (Mechanical) (OP)
27 Apr 09 22:56
It seems the best source for this information is in the machinery's handbook (Spring materials: pages 309-312).

For flat strip form, the following high-carbon spring steels are suggested:

*  Cold-Rolled Spring Steel, Blue-Tempered or Annealed, AISI/SAE 1074, 1064, and 1070 (Hardness: 42 to 46 Rockwell C)

*  Cold-Rolled Spring Steel, Blue-Tempered Clock Steel AISI/SAE 1095 (Hardness: 47 to 51 Rockwell C)

302 S.S. appears to be used, but less frequently. 17-7 PH S.S. has high manufacturing costs, so I probably will not consider it. Another material used for leaf springs is Beryllium Copper, but I am not using this for an electrical application where low resistance is needed for electrical current flow.

If you know of other flat strip material used for leaf spring applications, please post the information.

 
israelkk (Aerospace)
28 Apr 09 0:35
What is the application of this spring?
Space limitations?
Static or Cyclic/dynamic application?
Relaxation/creep?
Spring accuracy load and deflection accuracy?
Load stability?
Shock?
Quantities?
Target price?

These questions in addition to desertfox posts and more will dictate the candidate spring materials.
desertfox (Mechanical)
28 Apr 09 0:55

a few more here


http://www.grewis.cz/tvarovky_e.htm

desertfox

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close