jt12
Structural
- Sep 28, 2006
- 59
I've had 3 or 4 jobs in the past year where I've had some sort of a stainless steel plate application where the pressures on the plate are supported by carbon steel stiffeners. The stiffeners are welded to the SS using intermittant welds on each side. One of the applications got up to 350 degrees F. I allowed this design through some careful detailing, but don't think the numbers exactly worked to prevent one or both (plate / stiffener) from elastically yielding under the thermal stress. I wouldn't allow this arrangement another applcation got up to 950 degrees F. I told them they needed to use plate and stiffener metals of more matching thermal expansion properties. The stainless and carbon steels expand differently under heat and since they are attached stress each other.
Does anyone have any experience with this type of thing to know what operating temperatures are OK and which cause problems? Also, is anyone familiar with the welding process involved to prevent the welding heat to thermally stress the connecting metals? The 350 degree application has been operating for close to 6 months now, and I haven't heard of any problems with it, but I'd like to know more about this topic for the next time this situation occurs.
Does anyone have any experience with this type of thing to know what operating temperatures are OK and which cause problems? Also, is anyone familiar with the welding process involved to prevent the welding heat to thermally stress the connecting metals? The 350 degree application has been operating for close to 6 months now, and I haven't heard of any problems with it, but I'd like to know more about this topic for the next time this situation occurs.