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Background: My comapny has inheirited a 30+ year old Cheston electrical resistance heater that was originally capable of heating 5/8" and 3/4" 1015 carbon steel bars for forging (temp = 2200F°). Problem: the machine heats the 5/8" with no problems, however when running 3/4" bar, cratering...

Subject item: square nut, flat on the bottom and washer crowned (either a chamfer or radius) on the top. Question: what is the purpose of the washer crown? Shouldn’t the flat bottom of the nut be in contact with the washer for maximum surface area contact? Using the washer crowned side...

Hello, Can someone please briefly state the manufacturing differences between recessed heading quality and cold heading quality steel wire? What are the advantages of one over another? My product: we purchase 1008 fine grain alum killed wire, we permit for SAFS or SAIP. One company provides...

Thanks to all for the replies. CoryPad: Can you please list your ASM reference? I'll use it to document the information. Thanks again, Ron

Is there such a thing as a shelf-life for seamless 6061-T4 tubing? What about 6061-T6? The diameter of the tubes in question is 2" and less and we store them indoors. By shelf-life I mean a change in yield strength or hardness over time (6 months to years). I have been unsuccessful in...

I'm an engineer at a HV insulator manufacturer. We have one customer in California that requires a high charpy value for the transmission line hardware (15ftlbs at 0deg F). No other customers require this charpy value. My metal hardware is 1045 normalized steel and cannot meet the...