welding rates for different metals

[alan54]

I'm looking for a table that would show the relative time required to weld different metals, i.e. I've seen one source that says it takes twice as long to weld stainless as carbon steel, and 2.5 times as long to weld monel, etc.

 

[Bluexcell]

Here are a couple of differing examples, the problem being, that each type of weld has specific issues and characteristics. The answer must be subjective, depending on the particular situation / circumstance that exists at the time. An easy weld one day, may be a difficult weld the next. Any weld time comparison would have have to include a huge amount of relevent data pertaining to the situation and would have to be carried out under lab controlled conditions using all the methods available for each weld and then using all the currently available machines (each having its own characteristics), with reference to actual examples made in the real work place, that matched the criteria. And all this, under ideal conditions, with a skilled, knowledgeable operator ( each with their own characteristics!)

What is "possible" and what is "probable" and what is "practical" and what is "wanted" and what is "acheivable"...the five meeting together in a desired time frame is an acheivemnent..

" how long is a piece of string? " springs to mind...

http://www.staplaultrasonics.com/c7-econ/econ.htm.

http://www.ammagazine.com/AM/FILES/HTML/PDF/2001trends.pdf

I once tried to create a table for metal droplet formation on a wire tip, droplet deposition... The machine makes individual drops of known initial parameters.
I found there existed a window in which it was possible to make drops, using a chosen filler wire of known diameter.
Within that window, i found there were thousands of combinations of parameters ( including time ) that would produce a drop.
This was just for one filler wire type, using that particular machine and using my skill and knowledge. ( i mention that because it is relevent, it is likely that another skilled operative would achieve different results.)
Now, how to go about deciding the ideal for many filler wires in every circumstance and then, decide which set of parameters suited each and every joint, would be a lifetimes task without a cray computer..

I gave up..and carried on making drops, noting the parameters i found that worked well for a particular situation. I am a happier person for that..

 

[pipewelder1999]

The rate of welding is dependent upon the process used. Some materials are easyier/quicker to weld than others but the major controlling factor is the proces. GTAW is usually slower than SMAW which is slower than FCAW which is slower than SAW. Each process has it's advantages that may make it faster than one with a lower deposition rate.

I have a old VB computer application that takes into account the process variables and compares the cost of different processes but the data must be on hand to input.

A good source for obtaining the data is the AWS welding Handbook volume 1. Also some filler metal manufacturers have sites with HTML tables of data for their filler metals. These tables include deposition rate, deposition efficiency, stub loss for various electrode lengths and other valuable information.

One of the things that must be considered is the difficulty involved in welding the joint. This can make a butt weld in a 1/2" schedule 80 carbon steel pipe take as long as a 2" stainless. The acessability to the weld, the position, and the fitup are major factors.


Try ESAB and Lincoln web sites for deposition information for filler metals. Ask the welders about the other stuff.


Gerald Austin
Good Day

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