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Load Pin Material

Load Pin Material

Load Pin Material

(OP)
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?

RE: Load Pin Material

For shear load?  If so, check out spring pins at www.spirol.com.  They list the materials they use with strengths and breaking loads.

RE: Load Pin Material

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 AerMetĀ® 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

AerMetĀ® 100
http://cartech.ides.com/datasheet.aspx?&E=161

MP35N
http://cartech.ides.com/datasheet.aspx?E=3

Alloy 725
http://www.specialmetals.com/documents/High%20Strength%20Corrosion%20Resistant%20Superalloy%20Fasteners%20Springs%20&%20Hardware.pdf

General information on high strength fastener materials
http://www.techalloy.com/News/Exotic%20materials.pdf

RE: Load Pin Material

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."

RE: Load Pin Material

(OP)
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?

RE: Load Pin Material

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

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