Load Pin Material

[KSor]

I am looking for the best possible material for load pins. Currently, I am thinking of using 17-4 PH SS heat treated to H900. Is there something available that has similar yield strength (~200,000 psi), but with better Charpy Impact resistance values?

 

[BobM3]

For shear load? If so, check out spring pins at

http://www.spirol.com.

They list the materials they use with strengths and breaking loads.

 

[TVP]

There are few materials that will have better fracture toughness than precipitation hardening stainless steels at that type of strength level. The only one that I expect you can readily find data on is AerMet® 100 from Carpenter. It should have somewhat higher fracture toughness/impact strength than PH stainless grades at 200 ksi yield. The following links provide some data on various alloys that can achieve 200 ksi yield and still maintain good toughness:

Type 17-4 PH

http://cartech.ides.com/datasheet.aspx?E=261

AerMet® 100

http://cartech.ides.com/datasheet.aspx?&E=161

MP35N

http://cartech.ides.com/datasheet.aspx?E=3

Alloy 725

http://www.specialmetals.com/docume...t Superalloy Fasteners Springs & Hardware.pdf

General information on high strength fastener materials

http://www.techalloy.com/News/Exotic materials.pdf

 

[israelkk]

Custom 455, 465. However, what do you mean load pin? How it us used and loaded. H900 heat treatment should be used carefully. Here is a quote from MIL-HDBK-5J: "The impact strength of 17-4PH, especially large size bar in the H900 and H925 conditions, may be very
low at subzero temperatures; consequently, the use of 17-4PH for critical applications at low temperatures
should be avoided."

 

[KSor]

Israelkk,
Do you have much experience with Custom 465? I've been doing some research and the properties are excellent, very much what I am looking for? Any drawbacks or unusual properties that I would need to be aware of?

 

[EdStainless]

I would suggest C455. It is available and straightforward to work with.
Are there any corrosion issues? What temperature range?

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