stainless fastening

[rangelandjim]

What is best option to fasten 3mm stainless U pins to 5mm stainless support plate?

 

[unclesyd]

How many are talking about?

Which end of the U pin is to be attached?

What are the loads to be imposed on the joint?

What are the materials?

 

[rangelandjim]

Thanks uclesyd,
new product now hundreds could climb to thousands,
both ends of U pin are attached to support plate, i.e U pin forms bracket,
joint loading is 2 to 4 pounds
materials 304 stainless steel, application temp 250C (482F)

 

[unclesyd]

Your temperature and plate thickness precludes essentially everything except welding or brazing (furnace) with preforms.

From the back side:
I think that MIG Spot Welding is the best approach for the small numbers. The plate thickness of 5 mm may necessitate two small through plate holes, essentially a plug weld. The holes and weld would be small due to the load requirements. This would be an autogenous weld.

This could possibly be accomplished in a normal spot welder with a little set up.

From the front side:
I have also seen this accomplished with a stud welder(arc) with a special head.

MIG Spot Welding

http://www.esabna.com/EUWeb/MIG_handbook/592mig11_1.htm

How much distortion can you have in the plate?

Does the plate have any other holes in it?