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ETD 150 has the same tensile strength. If you are threading you lose about 10 to 15% of the strength if you cut the thread vs rolling them.
Ed.
Yes, ETD-150. The best of both worlds, machinability and strength.
Get some grade 8 bolts slightly larger than object to be made
Two inch grade 8 bolts are a bit on the pricey side My target diameter is 1.5"
Anything that needs 1.5" diameter bolts should have an engineer specifying the material and design.
thanks, mom
thanks, mom
You are already removing two of the requirements of grade 8 - heat treat after threading and rolling threads - It might be time to get engineer or at least client to sign off. You still need to know if it is type 1 (plain steel aka secret 4140 derivative) or type 3 (corten derivative).
Grade 8 bolts are not very expensive, why not just get a 10 or 12 in long bolts?
So why do rolling threads / heat treat after threading matter if the tensile strength of the material matches or exceeds such of the grade 8 bolt ? Okay, say if it only matches it, then the resulting part will be somewhat weaker due to difference in threading. But if it exceeds, like some of the alloys suggested above ?
Not quite sure what you're suggesting. Getting a long bolt and using it as a donor stock ? Just for funzies I checked McMaster - closest to what I'd need is 1-3/4x10" at $65.15 a piece... except my part is 12" long. Still, seems like raw stock would be cheaper.
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