Cold Temperature effect on welding
Cold Temperature effect on welding
(OP)
Does a cold temperature have an effect on the weld strength/capacity?
We have some welding going on in temperatures in the 20s and low 30s,and possibly tomorrow in the 10s.
I'm looking on AISC and AWS as we speak, but I thought I'd ask the seemingly endless knowledge base here.
Thanks in advance!
We have some welding going on in temperatures in the 20s and low 30s,and possibly tomorrow in the 10s.
I'm looking on AISC and AWS as we speak, but I thought I'd ask the seemingly endless knowledge base here.
Thanks in advance!
RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke





RE: Cold Temperature effect on welding
Yes it does. Cold weather means....faster cooling rates and surface moisture formation... which means... increased susceptibility to cracking during and after welding..... which means reduced load carrying capacity.
So preheat the steel in the region to be welded with a torch to at least 50 deg F before welding.
RE: Cold Temperature effect on welding
Q: What is the coldest ambient temperature allowed for welding carbon steel and stainless steel pipes and structure?
A: Whenever ambient temperature causes water vapor condensation upon metals, it is recommended good practice to preheat before welding up to 120 C to make sure the joints are dry.
A few authorities, specifying the conditions for welding of Bridges and similar Structures, put the coldest ambient temperature limit, below which welding is not allowed, at 0 0F or -18 0C.
See:
http://
(page 12) and
http:
(page 9)
Other authorities, dealing with welding requirements for Piping and Pressure Vessels, put the coldest ambient temperature limit, below which welding is not allowed, at 32 0F or 0 0C.
See:
http://www.wbdg.org/ccb/NASA/NASAASC/NS15055.pdf
(page 6)
For ASME Codes and Standards, the minimum temperature for welding is generally specified at 50 0F or 10 0C.
Minimum temperature and preheat requirements for welding on pressure retaining items are also referenced in the National Board Inspection Code (2004 Edition), Appendix B."
extract from
http://w
luis marques
RE: Cold Temperature effect on welding
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: Cold Temperature effect on welding
RE: Cold Temperature effect on welding
http://www.jflf.org/pdfs/papers/keyconcepts1.pdf
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RE: Cold Temperature effect on welding
All cold weather welding is tented if at all possible.