Need Material with HIGH Shear
Need Material with HIGH Shear
(OP)
I'm looking for an alloy with an extremely high shear. I have an application where the piece is in pure shear. I tried 4340 Q&T that had a Tensile yield of 240ksi and a shear of about 180ksi but it couldn't handle the load. I'm looking at 300ksi (tensile) MP35N but I cannot find any data on the shear strength.
Does anyone have a suggestion for a material with 200+ ksi shear strength?
Does anyone have a suggestion for a material with 200+ ksi shear strength?





RE: Need Material with HIGH Shear
RE: Need Material with HIGH Shear
If this pin is loaded only in shear then you have some options.
Look at Elgiloy, in the cold worked+aged condition. It will be stronger than MP35N.
Many age hardening alloy can be hardened directly from the cold worked condition to reach higher strengths. This heat treat condition is usually not recommended since the ductility is very low, but high strengths, even in alloys like 17-7PH can be achieved.
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Plymouth Tube
RE: Need Material with HIGH Shear
RE: Need Material with HIGH Shear
A lot of the required shear strength resolves around how is the load applied, speed.
Other points to look at is both contact faces, edge of and fit of pins in hole. In a project that I worked on many years ago involving a small hardened shear pin, .078" dia. showed that 0.001" gap between the faces had a large affect on the shearing strength. In the same tests I tried different radius on the holes also had a large effect on the shearing point.
RE: Need Material with HIGH Shear
RE: Need Material with HIGH Shear
Distance between shear plates and the shape of the hole in reality brought in a tensile component to the shearing action.
Another point is that the pin holder has to be as hard or harder than the pin in shear. In other words you can't insert a very hard pin on !020 CS and expect to get consistent results. This can be mitigate somewhat by using a larger dia. pin.
RE: Need Material with HIGH Shear
Your ring is 4340 at Rc38? If so then your pins should not be harder than that. If that is not enough strength then you need larger pins and/or more pins.
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Plymouth Tube