1095 vs blue tempered?

[team08]

I need a spring steel for an application where the sheet goes into a mold which has some mild bends (8" radius is the tightest bend), and is heated to ~200 degrees F. I would like the sheet to return to normal out of the mold, and not take a set. I have a sample of blue tempered that works very well, but I need sheets that are about 15"x72" and it is tough to find blue tempered in this width. Would 1095 cold rolled annealed be a suitable alternative?

 

[NickE]

Annealed material is probably going to take permanent bend. How thick of a sheet do you need?

Nick
I love materials science!

 

[team08]

I need around 0.020" thick material. Thanks.

 

[NickE]

Try Sandvik in benton Harbor MI.

They definately have 1095 Hardened and Tempered that will have the kind of properties you want.

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

you wnat something similar to 20C or Shock grade steel.



Nick
I love materials science!

 

[TVP]

I agree with NickE, annealed material is unsuitable. There are a number of producers of pre-quenched & tempered spring steel strip with the nominal composition of grade 1095 according to SAE J403 (C100S according to DIN EN 10132-4, SK 4-CSP according to JIS G 4802). Sandvik is an excellent choice, as is Hitachi. Theis Precision Steel is another possibility.

 

[team08]

Thanks. I have been looking/quoting with Precision Steel. They did not have blue temper in anything wider than 12.375". This is the 1095 I was looking at:

http://www.precisionsteel.com/products/default.asp?n_cat_id=3&prod_id=304

So that is not suitable? Thanks again (I am not a materials guy AT ALL)

 

[unclesyd]

I would give Admiral Steel a call. They have been quite helpful to me in the past.

http://www.admiralsteel.com/

 

[team08]

I just got a quote for:

BLUE TEMP 1074-75 SPR STEEL

Would this be okay?

 

[TVP]

Without knowing the stresses, it is impossible to know precisely, but this type of spring steel is quite similar to 1095, just a little lower in strength.

 

[NickE]

A good way to estimate the strength is to compare the hardness readings, on this thin of sheet you are going to need to use the HR15n scale (Rockwell superficial 15kg major load).



Nick
I love materials science!