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Post by steamcoal on Jul 27, 2015 19:20:31 GMT
Keith,
Though not suitable for boiler construction odds and ends are obviously Ok for non critical fabrication of parts.
My friend gave some that was made up of butted short lengths of flat which were RRoyce ends and offcuts. I use it sparingly but they are invaluable for small joints.
Has anyone ever suffered from the effects of cadmium uptake in the industry to your knowledge? There are most likely far worse nasties out there in the workplace.
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Post by alanstepney on Jul 27, 2015 19:49:10 GMT
When we did the survey of cadmium effects to model engineers using silver solder, there were NO instances that anyone could find. To get a lethal dose, would mean needing something like 8hrs a day using it for months at a time, and with poor ventilation too. (Not sure of the exact figures after this time, but that was roghly the case.)
So, in practice, dont worry.
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steam4ian
Elder Statesman
One good turn deserves another
Posts: 2,069
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Post by steam4ian on Jul 27, 2015 23:09:03 GMT
Alan,
Were any of the blokes using the cadmium silver solder pregnant at the time?
Problem is commercial use where persons are using it for long periods and some of the work may be done by younger women. There would not be a large enough amateur market to justify having a special solder for our use and there would be no way of preventing it being used commercially.
Ian
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Post by shauncup on Jul 27, 2015 23:37:19 GMT
Just wanted to say that even though Keith and Jane have embarked upon what we all hope will be a long and happy retirement, please don't panic, they will still be around, as will CuP Alloys! Indeed they will both be at the Midlands Exhibition at least Thursday and Friday when Keith will be in the Lecture Hall approx 12 noon with another (new) informative talk. Anyone there with any Questions about silver solder please come to the stand.
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Jul 27, 2015 23:38:34 GMT
thanks Keith, of Cupalloys fame, for clarifying the exact grade of silver solder hayden was looking for. as 'easyflo' is a J-M registered trademark i looked at J-M's website and could only find silverflo 45 and silverflo 452.
i am somewhat surprised that our american cousins are using the 'easyflo' name for 'easyflo 45' as suggested by Keith as i am sure J-M would have something to say about this!
i do recall a lot of literature and stuff on the web 4 years ago about export of cadmium bearing stuff, but i bow to Keith's far superior expert knowledge on these things, and i must have been mistaken or else my memory is playing tricks.
cheers, julian
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Post by runner42 on Jul 28, 2015 8:14:50 GMT
Brian. In your boiler build you have just completed , did your AMBSC BI mention the prefered jointing material? Do not think the joint material is described in the code? Is it prescribed in the code which material should be used, Easyflow2 or other or did the BI tend to prefer one over the other? I guess both are available in Australia but #2 has the historical preference for obvious reasons. Hayden The BI did not indicate which silver solder to use. Do you mean that the silver solder I used is not in the code or a general question that the code is silent in prescribing which silver solder to use? Either way the code does list acceptable materials and under para 2.3 list silver solders that comply with AS 1167.1. Included in this list is two low cadmium and four high cadmium silver solders. However, the one I used is cadmium free so it is a later type of silver solder not available at the time that the code was initially produced and cadmium free silver solders have been overlooked for inclusion in the code in subsequent updates. The silver solder I used complies with AS 1167.1 and meets the requirements for minimum silver content and does not contain phosphorous. The code will eventually address cadmium free silver solders.
I don't know if Easyflow2 is available in Australia.
Brian
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Post by steamcoal on Jul 28, 2015 11:07:36 GMT
Brian.
I was just asking if the code advises the jointing material in the prescriptions which are written. Obviously what you have undertaken with the boiler build will have left few stones unturned so your the man to ask I guess. Your answer is exactly what I needed to know.
We have decided to more or less abandon the quest to procure Easyflo and the small amount we can get will be used for fitting of bushes and the like. It seems that it is practically a futile case to track down Easyflow, now even though it can be obtained in the USA when it seems likely that the rules will change inevitably and the AMBSC code will likely deal to it anyway as you indicate.
The quicker we make the change the better.
Thanks.
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44767
Statesman
Posts: 529
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Post by 44767 on Aug 4, 2015 5:30:44 GMT
Have you tried MBM in New Zealand? They list 42% silver silver solder in their catalogue and I understand that they import it directly from the manufacturer. Easyflo is only a trade name for the particular alloy that JM used to sell. The actual alloy you are looking for is AG 303. Maybe if you were to order it by the kilogram they would get some in in which ever size you would like.
Mike
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Post by steamcoal on Aug 4, 2015 19:27:51 GMT
Mike.
My cobber has got some coming from the USA, its for his boiler so enough to replace the qty he borrowed.
Getting it imported is easy, just have to track it down but will check with MBM.
What jointing material are they generally using in Auckland these days?
Hayden
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44767
Statesman
Posts: 529
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Post by 44767 on Aug 5, 2015 11:50:28 GMT
We're still using 42% cadmium bearing silver solder. As long as we can get it it is the easiest to use and since all the literature about silver soldering was written while Easyflow was available, it's safest to use this along with all the recommendations the books state.
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