We all know different metals can cause galvanic corrosion, but can you get galvanic corrosion on similar-ish steel alloys?
For example, could 4140 and 1026 cause problems if they are in long-term contact?
For years, my company (consulting engineering) has included "or Eq." in drawing material callouts (IE "Material: ASTM A36 or Eq.")
Is this wise to do?
How will a fab shop interpret "equivalent"?
If I happen to suffer from momentary stupidity and specify a tube made from A36 I am fine if they...
I have a material certification report (for C-channel) and at the bottom, it states: "No weld repair was performed on this heat".
This makes me wonder: Do mills sometimes repair defects in structural shapes? Grind out the defect, fill it with weld, grind it smooth, and send it out the door?
Equalizer is a very common hitch maker and they use springs arms that are a 1.5" square rod (3 feet long). I used a 3 point bend test to approximate their yield strength (because that was the handy equipment) and measured a yield strength of around 190ksi. This size, shape and strength put it...
MintJulep, yes K in your equation is exactly what I was asking about. Another way to ask my question is: Do the differences between CD1018 and HR1020 affect the thread friction?
And it sounds like the answer is: "all steels" (or maybe just "all mild steels"?) will have the same thread friction...
I have read several sources that say to know the torque factor (or nut factor - or bolt factor) you need to measure it for your particular situation. I am analyzing joints that have been being manufactured for quite some time. All joints have the same bolt, same threadlocker and the same...
Screwman1, I will be testing the nut factor. Thank you. That is good advice.
I've read in textbooks that threadlockers can act as lubricants, but some of the threadlocker datasheets made it sound like they would increase rather than decrease the friction (like you said). I was not sure if I was...
Desertfox, the link you posted is very helpful. Thank you. But there is one part of the article that I do not understand:
"This would require a pushing load, which would have to be maintained at levels along the line XU. But the joint members cannot exert loads at these levels. They can only...
Does anyone apply threadlocker under the head of the bolt?
Frequently, bolts are preloaded by measuring the torque used to tighten the bolt. Lubricants are frequently used on bolts to reduce the variability of the friction. When lubricating with oil, some people will recommend putting oil under...
Over the years, I have seen a few sources talking about tightening bolts until they yield. (https://en.wikipedia.org/wiki/Torque-to-yield_fastener)
The motivation is keeping the bolts tight and yield is easy to accomplish and yield is relatively predictable (compared to friction and torque)...
