Carbon Steel Padeyes welding to Stainless Steel Frame
Carbon Steel Padeyes welding to Stainless Steel Frame
(OP)
Dear Community Members,
Can a carbon steel padeye (Fy = 250 MPa/345 MPa) be welded to a Stainless Steel Frame (SS316) to facilitate lift operation? Are there any restrictions that will render the payeye not fit for reuse should the frame need to be replaced at the end of service life?
Thanks and Regards
Can a carbon steel padeye (Fy = 250 MPa/345 MPa) be welded to a Stainless Steel Frame (SS316) to facilitate lift operation? Are there any restrictions that will render the payeye not fit for reuse should the frame need to be replaced at the end of service life?
Thanks and Regards






RE: Carbon Steel Padeyes welding to Stainless Steel Frame
If the frame has to be stainless steel, shouldn’t the padeyes which might need to be used years later also be stainless steel, for all the same reasons as the frames. The two materials can be welded together, but you degrade some of the characteristics of the SS in the process. You could also make the padeye up from a SS middle pl, with two carbon steel side/cheek pls. to get the full width. This gets the carbon steel welding away from the frame or vessel.
RE: Carbon Steel Padeyes welding to Stainless Steel Frame
Does it have to be a welded lifting lug? Could you bolt or screw a lifting device on, which may be removed after installing,mas an alternative to what dhengr has suggested.
RE: Carbon Steel Padeyes welding to Stainless Steel Frame
Thanks for your replies. My first thought was to recommend Stainless steel padeyes as the frames were made of the same material. A proposal was put forward by the Contractor to weld Client supplied standardised padeyes with CS material.
Bolted connections are not allowed as per Client specifications.
Thanks and Regards
RE: Carbon Steel Padeyes welding to Stainless Steel Frame
I second dhengr's remarks. What if the padeyes are rusted away when you need them?
RE: Carbon Steel Padeyes welding to Stainless Steel Frame
Desertfox's idea of using a bolted connection has merit... and the padeye can actually be detached and stored away to be 'lost' <G>.
Dik
RE: Carbon Steel Padeyes welding to Stainless Steel Frame
Best Regards,