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Hello

A good resource to use is the Copper Developement assocaition (CDA).

Official Site of Copper Development Association, Inc. (USA)

Craig

In some cases, CDA alloy names have been used as the basis for UNS designations. So, CDA 815 may correspond to UNS C81500. 

Information about UNS C81500 is provided in various online sources and in the ASM Digital Library. 

Copper.org can be a good source. C815 is a chrome copper and the values match close to those you mentioned. in case of PC-12, It looks like a private specification but equivalent could be available. 

Yes, CDA 815 in modern times refers to UNS C81500 which is a high copper alloy with  Cr (0.40% - 1.5%). You can look in the UNS book that defines alloy compositions (Metals & Alloys in the Unified Numbering System, 14th Edition HS-1086/2023) for a cross-reference for this alloy to determine what spec to use that meets the specs you received. As for PC-12, I have not found anything about this alloy but you may have good luck looking in the ASM reference book "Worldwide Guide to Nonferrous Alloys".  Could SB be referring to satin brass?

Could "PC-12 SB Brass" refer to "PC-#12-SB"?

https://cdn.websites.hibu.com/37c982faefc1458da5cf78d02d7ec98a/files/uploaded/perma-cast-alloy-selection-guide.pdf

Yes, CDA 815 in modern times refers to UNS C81500 which is a high copper alloy with  Cr (0.40% - 1.5%). You can look in the UNS book that defines alloy compositions (Metals & Alloys in the Unified Numbering System, 14th Edition HS-1086/2023) for a cross-reference for this alloy to determine what spec to use that meets the specs you received. As for PC-12, I have not found anything about this alloy but you may have good luck looking in the ASM reference book "Worldwide Guide to Nonferrous Alloys".  Could SB be referring to satin brass?

If the table attached by David is correct the alloy PC-12 could be UNS C86100; but the strength will be higher and conductivity will be lower for C86100 than prescribed above. If you need 30-35% IACS then the Zn and Al content need to be lower.

Could "PC-12 SB Brass" refer to "PC-#12-SB"?

https://cdn.websites.hibu.com/37c982faefc1458da5cf78d02d7ec98a/files/uploaded/perma-cast-alloy-selection-guide.pdf

Yes, CDA 815 in modern times refers to UNS C81500 which is a high copper alloy with  Cr (0.40% - 1.5%). You can look in the UNS book that defines alloy compositions (Metals & Alloys in the Unified Numbering System, 14th Edition HS-1086/2023) for a cross-reference for this alloy to determine what spec to use that meets the specs you received. As for PC-12, I have not found anything about this alloy but you may have good luck looking in the ASM reference book "Worldwide Guide to Nonferrous Alloys".  Could SB be referring to satin brass?

Could "PC-12 SB Brass" refer to "PC-#12-SB"?

https://cdn.websites.hibu.com/37c982faefc1458da5cf78d02d7ec98a/files/uploaded/perma-cast-alloy-selection-guide.pdf

Yes, CDA 815 in modern times refers to UNS C81500 which is a high copper alloy with  Cr (0.40% - 1.5%). You can look in the UNS book that defines alloy compositions (Metals & Alloys in the Unified Numbering System, 14th Edition HS-1086/2023) for a cross-reference for this alloy to determine what spec to use that meets the specs you received. As for PC-12, I have not found anything about this alloy but you may have good luck looking in the ASM reference book "Worldwide Guide to Nonferrous Alloys".  Could SB be referring to satin brass?

Yes, CDA 815 in modern times refers to UNS C81500 which is a high copper alloy with  Cr (0.40% - 1.5%). You can look in the UNS book that defines alloy compositions (Metals & Alloys in the Unified Numbering System, 14th Edition HS-1086/2023) for a cross-reference for this alloy to determine what spec to use that meets the specs you received. As for PC-12, I have not found anything about this alloy but you may have good luck looking in the ASM reference book "Worldwide Guide to Nonferrous Alloys".  Could SB be referring to satin brass?

Thanks Aaron. PC-12 is a manufacturer spec. Unfortunately, the manufacturer doesn't exist anymore and hence the search for an equivalent.

Yes, CDA 815 in modern times refers to UNS C81500 which is a high copper alloy with  Cr (0.40% - 1.5%). You can look in the UNS book that defines alloy compositions (Metals & Alloys in the Unified Numbering System, 14th Edition HS-1086/2023) for a cross-reference for this alloy to determine what spec to use that meets the specs you received. As for PC-12, I have not found anything about this alloy but you may have good luck looking in the ASM reference book "Worldwide Guide to Nonferrous Alloys".  Could SB be referring to satin brass?

Thank you Paul for a detailed reply to my query. 

You are absolutely right on several counts. The customer used this part, which was designed by someone who retired decades ago; there is no organizational memory of where this spec came from. The problem was compounded by the fact that the user has been buying this component from China for two decades and the engineers/managers managing the show have no clue what they are buying. They have been buying from the supplier for a long time and there was no problem with the part and hence never had to ask questions. Now the customer wants to source from India, and we are asking all the questions and trying to find answers. The engineers in the customer organization have no answers and probably do not want to make an effort to find them. 

Your advice about adding 'protectionist' clauses in the purchase agreement is the right way forward. We will do our research and add another layer of safety with this clause, just-in-case. 

The properties you provided really indicate the specified material is proprietary Perma-Cast PC-12. I wonder if your supplier was really supplying this alloy, or whether they just were supplying some imitation. I again suggest you contacting Perma-Cast directly regarding getting the specified material. Your alternative is to perform an engineering review to find an acceptable material meeting the operating and structural needs of your actual application.

Thank you Paul for a detailed reply to my query. 

You are absolutely right on several counts. The customer used this part, which was designed by someone who retired decades ago; there is no organizational memory of where this spec came from. The problem was compounded by the fact that the user has been buying this component from China for two decades and the engineers/managers managing the show have no clue what they are buying. They have been buying from the supplier for a long time and there was no problem with the part and hence never had to ask questions. Now the customer wants to source from India, and we are asking all the questions and trying to find answers. The engineers in the customer organization have no answers and probably do not want to make an effort to find them. 

Your advice about adding 'protectionist' clauses in the purchase agreement is the right way forward. We will do our research and add another layer of safety with this clause, just-in-case. 

Sorry to sound somewhat sarcastic, but there have been many well thought out responses; however, the important fact that has been clearly established is that PC-12 SB is a proprietary alloy of Perma-Cast.  You will not find the composition published in the open literature and it is unlikely that an honorable professional would give it to if they were to know it. You have only three choice,1. direct your customer to Perma-Cast for them to make the part, 2. seek a license from Perma-cat to produce their alloy or 3. do the Materials Engineering to find a suitable substitute commercially available alloy that meets the customer's physical and mechanical requirements.

Ken    

It seems like the OP's info request has been satisfied.

Maybe someone did mention in the thread that the original alloy was from Perma-Cast, I missed that.  Makes sense in the designation. The current company that comes up with that name makes swimming pool hardware, so maybe the company is defunct, or the name was bought or the company changed hands or commercial focus, or the trademark was lost due to the company not defending it.

An alloy's composition can be patented, and the name can be trademarked.  Patents have a finite lifetime, and the comments made suggest that it's been a long time since the alloy was called out.  But the composition is much more often held as a trade secret. Though I have handbooks full of industrial but non-standardized alloys that have generic compositions listed - see Woldman's Engineering Alloys, on offer here at ASMI, for example.

One cannot use the originator's trademarked name for the alloy.  But anyone competent with a metallograph and an analyzer can probably get well along to duplicating it if part of the original is at hand, and it isn't unlawful if not violating a patent.  Does that give someone the expertise in the development and production equivalent to the originator?  Of course not. The OP was asking for a source of the material to supply it to his customer.  As I suggested the OP, and his customer, need to evaluate whether mere duplication to a "dead guy's rules" is good enough.

Sorry to sound somewhat sarcastic, but there have been many well thought out responses; however, the important fact that has been clearly established is that PC-12 SB is a proprietary alloy of Perma-Cast.  You will not find the composition published in the open literature and it is unlikely that an honorable professional would give it to if they were to know it. You have only three choice,1. direct your customer to Perma-Cast for them to make the part, 2. seek a license from Perma-cat to produce their alloy or 3. do the Materials Engineering to find a suitable substitute commercially available alloy that meets the customer's physical and mechanical requirements.

Ken    

FYI, I found the attached on-line. I believe it qualifies as a published document. Perma-Cast location and phone included

Sorry to sound somewhat sarcastic, but there have been many well thought out responses; however, the important fact that has been clearly established is that PC-12 SB is a proprietary alloy of Perma-Cast.  You will not find the composition published in the open literature and it is unlikely that an honorable professional would give it to if they were to know it. You have only three choice,1. direct your customer to Perma-Cast for them to make the part, 2. seek a license from Perma-cat to produce their alloy or 3. do the Materials Engineering to find a suitable substitute commercially available alloy that meets the customer's physical and mechanical requirements.

Ken    

Thanks Gerson,

As I mentioned in an earlier post, we found this table and cannot find PermaCast - the alloy manufacturer. I will try once again with the phone number you have provided. Thank you for your effort and help.

FYI, I found the attached on-line. I believe it qualifies as a published document. Perma-Cast location and phone included

Sorry to sound somewhat sarcastic, but there have been many well thought out responses; however, the important fact that has been clearly established is that PC-12 SB is a proprietary alloy of Perma-Cast.  You will not find the composition published in the open literature and it is unlikely that an honorable professional would give it to if they were to know it. You have only three choice,1. direct your customer to Perma-Cast for them to make the part, 2. seek a license from Perma-cat to produce their alloy or 3. do the Materials Engineering to find a suitable substitute commercially available alloy that meets the customer's physical and mechanical requirements.

Ken