Welding 410SS to A36 structural steel
Welding 410SS to A36 structural steel
(OP)
As part of a larger project I'm working on, I need to specify the welding of a 410 stainless steel plate to an A36 structural steel I-beam. The I-beam is partly embedded in a concrete structure. The purpose of the stainless steel plate is for wear and corrosion resistance. A self-lubricated bearing pad slides on the plate. This is a modification to an existing structure, so all of the work will need to be done in-situ. I am not a welding expert, so any guidance you could give would be very helpful. Some of the concerns I have are:
1. What is an appropriate filler material?
2. Is pre-heating and post-weld heat treatment required? If so, how can that be done without damaging the concrete?
3. How can I ensure that the plate isn't distorted due to the welding process?
Thanks in advance.
1. What is an appropriate filler material?
2. Is pre-heating and post-weld heat treatment required? If so, how can that be done without damaging the concrete?
3. How can I ensure that the plate isn't distorted due to the welding process?
Thanks in advance.





RE: Welding 410SS to A36 structural steel
As far as corrosion resistance, I don't know all of your specific concerns. However, if you are selecting the 410 SS for this aspect of the job, I would give serious consideration to the AR-400 plate alternative.
Regarding welding, using AR-400 plate, an E7018 fillet metal is appropriate and welding at 50 deg F minimum preheat is all you need. Using 410 SS, bigger headache because of preheat(400 deg F) and post weld heat treatment concerns.
RE: Welding 410SS to A36 structural steel
Perhaps I should have said hardness rather than wear resistance, since the plate won't see that much wear. There will only be a few cycles per year of the part that rides on it. However, we want the plate to be harder than the lubrite bearing pad to prevent them "welding" together. The bearing hardness is 223 Brinell. The wearing plate should be 50-100 points harder.
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
You can butt the bars up to the plate and weld them in on site so there would be no gap.
RE: Welding 410SS to A36 structural steel
Any way you manufacture this, be carefull about distortion. A welded plate seldom comes out flat enough for a bearing plate without further machining unless it is very thick. If you welded a stub beam to the plate in the shop, you could also preheat and PWHT in the shop, then machine the plate flat, and weld or bolt the stub beam to the existing beam with much less distortion. If you can weld the beam to the plate directly in the shop, there isn't a need to use the 309, although it will work well. 410 or 410NiMo filler would also work depending on PWHT temperatures.
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
RE: Welding 410SS to A36 structural steel
You could use 17-4/17-7/15-5 or any other PH grade. But you will need to weld tabs and then heat treat the plate.
Are you sure that a duplex SS will not work? What is the mating material? I presume that this is a flood gate or some similar structure. Is there anyway to force this to be flushed with water? The dirt/salt along with a wet/dry spach zone is a tough environment.
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
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