15-5 SS Equivalent 1

[farmer2]

Now use a brake spring in a high friction, high heat application. Material is 1065-1075 spring steel, Rc 42-46. In some high usage applications, spring life is inadequate.

Asked spring supplier to quote making the spring of 15-5 CRES. They are having a problem sourcing the material which is a .063 thick x .125 inch wide.

Could someone recommend alternate materials.

Thanks,

 

[unclesyd]

15-5 PH SS is a cousin to 17-4 PH SS and isn't used that much.

A more readily available material for springs would be 17-7 PH SS. This material is commonly used for springs of all types.

 

[EdStainless]

17-4 and 17-7 will be the most ocmmon choices. If someone offers you Custom 455 or 465 those would work also.

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Rust never sleeps
Neither should your protection

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[farmer2]

Thanks to unclesyd for recommending 17-7 SS material. So far in tests, this material looks like a great improvement over the 1065 steel curently used. It has more than doubled the life.

 

[NickE]

Yeah, 17-7 CH900 is going to have better resistance to heat, corrosion, and higher strength than 1065.

All giving it a longer life in a spring application.

 

[farmer2]

We are ready to release the 17-7 ph spring temper for production and I was wondering if there is a hardness range to specify on the dwg for inspection checks.

The current carbon steel spring dwg shows a range.

 

[EdStainless]

With PH grades it is usually the heat treatment that is specified. The hardness is reported, but your control is the heat treat method.
Make sure that you reference specifications for the heat treatment. Use AMS specs if you have to.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

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

 

[farmer2]

EdStainless,

The spring mfg said "spring temper" 17-7 ph was used with no other description.

Would there be a standard heat treat for spring temper or is that variable depending on what you want?

Thanks,

 

[EdStainless]

What specification of they want to supply to? You can use ASTM A693 or AMS 5528. In either case you should call out the UNS number, specification, and make sure that there is a minimum mechanical property requirement, not just hardness.
If they suggest a spec go buy a copy of it and read it. You need to know the rules.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

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

 

[mighoser]

Heat Treatment should be IAW, AMS 2759/3 to the CH900 condition which is pretty typical of springs using 17-7PH