I used to see drawings with -100 level sub-assemblies that fed into -300 level sub-assemblies which in turn fed into -500 level sub-assemblies. It seems like these were on Boeing and Northrop drawings, so maybe it's more of an aerospace industry practice. I've tried searching for this using...
I'm not sure if this is the correct forum for this, but here goes.
To know if a particular plating is RoHS compliant, I usually look for something like non hexavalent, trivalent, or RoHS. For instance ASTM B633 Types V and VI use a non hexavalent coating. I'm wondering about ASTM B841 though. I...
I'm working with a client and I need to calculate the change in temperature of an enclosed volume. I know the volume, ambient temperature, and heat added to the system (in BTUs). Can someone point me to the correct equation(s) to calculate the increase in temperature? What information am I...
I have a client that has received several cast iron pieces from a vendor that are slightly undersize in one location. I understand that a good weld can be stronger than the base material itself. Is it a generally accepted practice to weld or braze gray cast iron, and then possibly machine or...
I've been on this site a couple times before and have decided to make a profile, so this is my first post. I'm also a fairly new engineer, so please excuse my ignorance. I tried searching the forums for this topic and didn't find anything, so hopefully I'm not duplicating any threads.
The...
