weldable nuts
weldable nuts
(OP)
I have a situation where I need to weld a nut to a beam web to receive a threaded rod "thru-bolt" that will transfer tension/compression forces from the threaded rod to the beam web. One side of the beam web is not accessible, so a double locking nut arrangement is not possible. The threaded rod will be A36 steel. What nut material should be specified that is both compatible with the A36 threaded rod and weldable? I understand that high strength (i.e. heat treated) nuts should not be welded. Is this all a A563 nuts, or are there some grades of A563 that are weldable? What is the proper designation for nuts made from A36 steel if there is one?





RE: weldable nuts
Grade O (or A, or B) according to ASTM A563
C = 0.23% maximum
Mn = 0.90% maximum
S = 0.025% maximum
P = 0.020% maximum
This will eliminate steels that will have too much hardenability (C content from 0.23-0.55%), as well as free-machining steels like 12L14, etc. that have poor weldability.
RE: weldable nuts
I've seen them but don't know to what standard they are made...
RE: weldable nuts
RE: weldable nuts
RE: weldable nuts
RE: weldable nuts
So far, I have instructed the contractor to select a commercially available "weld nut" and submit for review prior to welding. We will see what they come with? If they cannot come up with anything acceptable, I will probably take TVP's approach above.