Cracks in Elevator door-Stainless Steel
Cracks in Elevator door-Stainless Steel
(OP)
My client has a Stainless steel cladded Elevator door in his building.The door is exposed to the west sun.The door develops cracks and bows after a period of time.The contractor changed the door twice.What could be the reason for this to happen??Is the Packaging material between the steel door and Stainless steel cladding not of a good quality?As far as I know,SS 304 cannot bow to low surface temperature levels.Can someone explain this phenomenon to me?





RE: Cracks in Elevator door-Stainless Steel
1. How is the elevator door constructed because you mention stainless steel cladding, is this thin gage stainless steel sheet that is bonded or fastened to a steel frame underneath or steel plate or ???
2. Are the cracks confined to the door frame or only in the stainless steel cladding?
3. Are the interior surfaces of the elevator clad with stainless steel sheet? How is it attached?
RE: Cracks in Elevator door-Stainless Steel
RE: Cracks in Elevator door-Stainless Steel
How is the SS fastend to the CS door pannel?
Are the cracks related to where the pannel is fastened?
What are the doors washed with?
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RE: Cracks in Elevator door-Stainless Steel
RE: Cracks in Elevator door-Stainless Steel
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Rust never sleeps
Neither should your protection
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RE: Cracks in Elevator door-Stainless Steel
RE: Cracks in Elevator door-Stainless Steel
RE: Cracks in Elevator door-Stainless Steel
The doors are what, 10' tall. And the surface gets how hot, say 160F (uncomfortable to touch).
If the tce is 9.6x10-6 then we will have 120" x 90F x 9.6 = 0.100" of total expansion. Yes, the SS will expand enough to bow outward from heating.
I have seen polished SS get so hot in the sun that it would burn you.
When the sheet boows out the outer srface is in tension. You need to have a sample looked at by a metallurgical lab. This may be choride stress cracking, or it may be thermal fatigue, or something else.
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Rust never sleeps
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RE: Cracks in Elevator door-Stainless Steel
RE: Cracks in Elevator door-Stainless Steel
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Rust never sleeps
Neither should your protection
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RE: Cracks in Elevator door-Stainless Steel
1 . Does Oil canning create bowing of the doors?
2 . Oil canning occurs due to Manufacturing defects and not due to exposure to sun.Then how can the SS Panel bow to the extent that the doors rub against the jamb and creates scratches on the SS??
Shank Kris
www.elevatorinspection.org
RE: Cracks in Elevator door-Stainless Steel
If they took sheet that wasn't flattened properly and forced it flat on the door, then the heating would cause it want to 'pop'. The combination of the two effects would cause huge stresses.
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Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Cracks in Elevator door-Stainless Steel
Shank Kris
www.elevatorinspection.org