Weld Hardened Threaded Rods
Weld Hardened Threaded Rods
(OP)
A Gigantic Equipment provider (GEp) is calling for the welding of hardened threaded rods to support suspended equipment that is subject to maybe 100 loading cycles/day.
Assuming the GEp will not be moved from their well thought out design criteria, is there a way for me to justify a welding process that will work?
If I use A193-B7 threaded rod and weld it, is there a reduced tensile stress that I can use for design without preheat? - with preheat?
Is there an AWS reference I can cite?
Found this but would like a little more. http://www.portlandbolt.com/technical/faqs/welding...
Thanks,
Assuming the GEp will not be moved from their well thought out design criteria, is there a way for me to justify a welding process that will work?
If I use A193-B7 threaded rod and weld it, is there a reduced tensile stress that I can use for design without preheat? - with preheat?
Is there an AWS reference I can cite?
Found this but would like a little more. http://www.portlandbolt.com/technical/faqs/welding...
Thanks,
RE: Weld Hardened Threaded Rods
Better to grind it smooth, weld the smooth part.
RE: Weld Hardened Threaded Rods
We can cure illiteracy, but there ain't no cure for stupid.
Steel alloy can be hardened only if there is sufficient alloying constituents to form martensite. Some ductility can be recovered by tempering, but at a loss of strength. The heat treatment must be closely controlled. All too often, the thermal cycles involved with welding are not closely controlled and the resulting microstructure is often untempered martensite. It is a bad idea any way you look at it.
Best regards - Al
RE: Weld Hardened Threaded Rods