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RE: Cold weather welding[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Cold weather welding
- From: "Conrad Harrison" <sch.tectonic(--nospam--at)bigpond.com>
- Date: Fri, 23 Feb 2007 11:20:38 +1030
I agree with Bill, and add:
This appears to be a situation where a specialized welding engineer and metallurgist should be involved, and not simply left in the hands of structural engineers and codes of practice.
Don’t forget that the rate of cooling determines the microstructures which are developed in the steel, and these affect the strength, ductility and notch toughness of the steel in the vicinity of the welded joint. The rate of cooling therefore needs to be controlled. Irrespective of any welding the low temperatures are also going to affect the serviceability and strength of the steel, the possibility of brittle fracture needs to be considered and guarded against.
B.Tech (mfg & mech), MIIE, gradTIEAust
Consulting Engineers (Structural)
tel: 8395 2177
fax: 8395 8477
From: Scott, William N
Welding at these temperatures usually requires weather protection. I also suspect that you should be using materials certified for low temperatures. We do this by specifying Charpy Notch Testing at the expected low temperature for structural steel, weld materials, and weld procedures.
You base the welds on AWS D1.1 and work with your welding engineer to develop the welding procedures.
Could anyone supply me with a link or technical document(s) regarding SMAW procedures and inspection of welding of structural steel where the ambient and steel temperature is between -30C and -60C?
V 780 470 5187
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