cwr
Involved Member
Posts: 61
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Post by cwr on Jun 9, 2011 19:32:13 GMT
Hi all
Decided it was time to scare myself by pricing up the copper for my Edward Thomas boiler. When my local metal stockist asked what grade of copper to quote on, I said C106. Was this the right answer?
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Post by baggo on Jun 9, 2011 23:52:29 GMT
C106 is the usual grade copper used for boilers.
John
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cwr
Involved Member
Posts: 61
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Post by cwr on Jun 10, 2011 12:21:34 GMT
Ah, good stuff. Thanks for the reply.
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Post by fasterbyelan on Jun 22, 2011 16:04:05 GMT
Hi all Decided it was time to scare myself by pricing up the copper for my Edward Thomas boiler. When my local metal stockist asked what grade of copper to quote on, I said C106. Was this the right answer? And did you scare yourself? |
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cwr
Involved Member
Posts: 61
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Post by cwr on Jun 27, 2011 16:26:45 GMT
Not too much, I had myself mentally prepared!
My local metal stockist seemed to have trouble getting a lot of the sizes I need. After 2 or 3 weeks they had only come up with the following, and they said they tried 4 different mills….
Sheet 1.0m x 1.6m x 1/8" £590 + Vat (in 3mm)
Tube 5/8” OD x 20 swg Can’t get
Tube 1 1/8” x 16 swg Can’t get
Tube 3” x 10 swg £63.50 + Vat per foot
Tube 6 ¼” x 10 swg Can’t get
Bar 3/8” x ¾” Can’t get
Bar ¼” dia £6.80/m
Still, the above was for two boilers, and there is enough material in the sheet to make the barrels out of.
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marco
Active Member
Posts: 33
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Post by marco on Nov 3, 2011 21:17:52 GMT
If you what to build a boiler with the silver brazing process, any grade is OK, if you want to TIG you have to use a C106 Grade with the correct filler wire and be coded by ZURICH or other approve independent body
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chiptim
Part of the e-furniture
Posts: 270
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Post by chiptim on Feb 26, 2012 8:22:59 GMT
I don't know if they ship to N. Ireland but I've always found P L Hill Sales or Mallard Metals very good for copper.
Might be worth an enquirery.
Tim
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chiptim
Part of the e-furniture
Posts: 270
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Post by chiptim on Feb 26, 2012 8:24:59 GMT
I know some of the copper bar is now very hard to get. I bought a larger piece and cut it lengthways, the cut face being on the top side of the foundation ring. Surprised about the tubes being hard to obtain though.
Tim (again).
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cwr
Involved Member
Posts: 61
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Post by cwr on Mar 7, 2012 7:49:21 GMT
I found another local supplier in the end where I got a 2m x 1m sheet, the 5/8” tube, 3/8” x ¾” bar, and ¼” rod from. The 1 1/8” and 3” tube I’ve just ordered from PL Hill (Thanks for the recommendation).
I think I found only one source for the 6 ¼” x 10 swg tube, but it’s much cheaper to roll form sheet so I will got that route. Think all in all I've shelled out over £900, and that’s not including silver solder…
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Post by cupalloys on Mar 9, 2012 8:21:36 GMT
You pays your money and takes your choice - it depends on what you want to achieve and how you want to achieve it.
C106 is better for silver brazing. It is oxygen free.
There is no danger of hydrogen embrittlement of the copper caused by the reducing part of a flame reacting with the oxygen to create steam. This steam can penetrate the grain boundaries creating cracks.
See info from the Copper Development Association.
Non potable plumbing grades of copper can contain lead. Lead is not alloyed. It exists as free particles. Silver solders do not like lead - they become sluggish and can influence the degree of penetration into the joint. Lack of penetration = weak joints.
You pays your money .......
keith
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