chicagomoon
Plastic
- Joined
- May 25, 2016
Hey guys,
I know this is a bit of an odd question. For one of my projects, I need to make a very efficient electromagnet (actually a dozen of them). Everything I've read says that the electromagnet should have an "Iron Core" and that other core materials don't work nearly as well.
I want to use an off-the-shelf M4 or M5 bolt for this. On mcmaster-carr there are a lot of different options for bolts. Actually now that I drill down into the specs, it seems like the finish/treatment is different and there's really only two different ones in the sizes I require:
Material Black-Oxide Alloy Steel
Fastener Strength Grade/Class Class 12.9
Tensile Strength 170,000 psi
Hardness Rockwell C37
Material Black-Oxide Alloy Steel
Fastener Strength Grade/Class Class 8.8
Hardness Rockwell C20
Tensile Strength 110,000 psi
Does the class, hardness or tensile strength give any indicators on the actual composition of these fasteners? Now that I realize there's only 2 different ones, I should probably just order both and use the one that works better eh?
I know this is a bit of an odd question. For one of my projects, I need to make a very efficient electromagnet (actually a dozen of them). Everything I've read says that the electromagnet should have an "Iron Core" and that other core materials don't work nearly as well.
I want to use an off-the-shelf M4 or M5 bolt for this. On mcmaster-carr there are a lot of different options for bolts. Actually now that I drill down into the specs, it seems like the finish/treatment is different and there's really only two different ones in the sizes I require:
Material Black-Oxide Alloy Steel
Fastener Strength Grade/Class Class 12.9
Tensile Strength 170,000 psi
Hardness Rockwell C37
Material Black-Oxide Alloy Steel
Fastener Strength Grade/Class Class 8.8
Hardness Rockwell C20
Tensile Strength 110,000 psi
Does the class, hardness or tensile strength give any indicators on the actual composition of these fasteners? Now that I realize there's only 2 different ones, I should probably just order both and use the one that works better eh?