Low-thermal EMF Solder

[BG5TOX]

Is anyone need low-thermal EMF solder ?

I am ready to customize a batch of solder which mentioned in LT AN-86 ? alloy  Cd60Sn40. (TOXIC ?ow-thermal EMF)

The minimum order quantity is 20kg (factory) , minimum package is 500g (person), 0.8 or 1mm , flux inside.

No actual price at this time, but I promise it is fine.

[zhtoor]

hello,

what would be the minimum order quantity, price and shipment cost to pakistan?

regards.

-zia

[zhtoor]

hello,

and the flux should be ROSIN (COLOPHONY) ONLY !

regards.

-zia

[BG5TOX]

for person MOQ=500g

The price is not yet confirmed, I'll update at first time.

Shipping to Pakistan no problem,from China.

yeah, flux is rosin.

[Andreas]

Is anyone need low-thermal EMF solder ?

Hello,

you should be aware that Cd is highly toxic.
And even with normal soldering temperatures (which are significantly lower than usual solder)
there are toxic damps. (so dont breathe and use only with exhaustion).

On the other side: if you are using components with hermetically package (aka LTZ1000)
a low thermal solder for copper/copper connections will be useless
since copper/KOVAR has around 40uV/K.

with best regards

Andreas

[Simon]

My my what a mess. Thank you to the original scammer for accidentally reporting the post whilst trying to reply. Posted in the wrong section for starters as far as I'm concerned the product is a complete and utter scam. I've never heard of solder made with cadmium which is a banned substance under the RoHS compliance regulations. Further most metals exhibit the same properties so I can't see how cadmium actually goes negative when the other metal goes positive.

[BradC]

Deleted because I was out of line.

[Simon]

In response to the post you deleted:

"I'm speechless. I totally get that you don't understand Seebeck coeficients, but it really warranted a ban?"

Now granted I don't understand seebeck coefficients and to be honest I've never heard of solder that reduces EMC problems. If you are looking at your solder then it means you have components generating RFI and perhaps you need to do something about those never mind the solder. Secondly cadmium is as pointed out above a toxic substance so I can't really see how this solder being offered is even legal. Never mind the fact that it sounds pretty unsafe due to the toxicity of the substance. I'm not allowed to use connectors that have the mere whisper of cadmium on them to give them green colour. I don't think solder that has cadmium as a major component is legal in most countries. Thirdly it is a first post from a new user directly advertising something in a completely wrong section. So yes I banned them as being just another spammer if anything. If this stuff is really genuine I'm sure there are other places it can be bought from we don't need some dodgy guy in China advertising it in the wrong section of the forum as his sole purpose for joining.

[Simon]

I was going to lock the thread but as somebody else replied as I was typing my closing post decided to leave it open.

[Gyro]

...
Now granted I don't understand seebeck coefficients and to be honest I've never heard of solder that reduces EMC problems. If you are looking at your solder then it means you have components generating RFI and perhaps you need to do something about those never mind the solder. Secondly cadmium is as pointed out above a toxic substance so I can't really see how this solder being offered is even legal. Never mind the fact that it sounds pretty unsafe due to the toxicity of the substance.
...

Just to point out that the OP is referring to "Low thermal EMF", not 'low EMC'.   

No argument with the Cadmium content, it is toxic!

[Simon]

I see that would make sense. Maybe miss read in my haste to get to the bottom of what was going on. Yes I am aware that temperature causes things to vibrate and create voltages of their own. Hence diodes can be used as temperature sensors. Anyway yes I left the discussion open as it looked like it might become interesting but the spammer is banned.

[BradC]

No argument with the Cadmium content, it is toxic!

So is lead, mercury and a host of other metals that the EU doesn't want you to play with. That doesn't make them any less useful however. It simply means you need to be a grown-up and mitigate the risks.

I'd be interested in a roll of Cd alloy solder, just like I have some 45% silver / Cd "hard solder". Sometimes (very, very rarely) it's the right tool for the job. You use the PPE, you take the precautions and like tradesmen have for decades, you use the product and don't die from it.

Heck, I'd love to get my hands on some high boiling point CFC that they still manufacture in third world countries. When you need a super high voltage insulator it's the ducks nuts. I can import solder, but I'd be hung, drawn and quartered if I tried to import a can of R11. Doesn't mean it's not useful though.

[Simon]

I never said it would not be useful. Personally I don't agree with the ban on lead. The ban on lead is basically because people do not follow the recycling guidelines set out by the same people that don't want lead used. If everything was properly recycled the lead would be recovered and it is a far easier material to work with.

[ogden]

Yes, he had to post into buy/sell/wanted and maybe here just refer to that post. Anyway in my opinion banning was overreaction.

Ni-Cd batteries contain Cd as well, some color pigments too, safety sheet of those are full of warnings. Original poster mentioned toxicity two times - in message and in graph attached. Daily intake of Cd in Europe is 8 to 30ug, so nobody will poison anybody with soldering sub-ppm instrument in properly ventilated area. Solder joint is not able to release enough metal to be health concern.

[Simon]

Indeed as I said connectors that I use at work can be bought with cadmium based pigment plating but a lot of customers refuse to have them now because they are wanting to improve their environmental regulations adherence. Yes batteries used to have cadmium but the end user never came into contact with that cadmium and the batteries were supposed to be disposed of properly.

People who register on this forum and immediately start trying to sell stuff do get banned. Those are our rules. Even if you are to post in the buy and sell section the expectation is that you are a genuine forum member with some posting history. Rocking up and selling your wares is not allowed hence he is banned as per the rules.

[xuda]

Okay,Simon, I don't want to argue,respect your decision, you have the right to ban any person you think irregularities.

I am not a businessman, I am a serious semiconductor engineer. Just wanna try this solder in several experiment to get test data.
This solder wire is not recommended for general applications? I just want to help people who really need it. (Anyway, you never have to use. It's so rare,especially the wire shape. Most people who need it are in this section)
This material is not environmentally friendly, but it is not illegal.  This thread is just a order aggregation thread~~(but NOW OVER)

I saw disdain for the Chinese in your lines and I am not happy about it.  so disappointed~

I hope it is a misunderstanding,thank you!

BG5TOX(XuDa)

[Simon]

My comment was not about the Chinese it was about your approach and we do get some of our worst spammers from Asia in general. The materials used in products in Europe are regulated by the CE regulations which are effectively the law. I am aware that there are obviously exemptions for example solder with lead can still be used in military and other specialist applications but you will be shot if you are found making something with lead solder in a consumer product. Although I have no idea how anybody would find out that you would struggle to find a pick and place assembly-line that will use lead solder for you it would be a specific request that would cost you as they would then have to clean the whole line down again to use non-leaded solder.

It would help if you are little more upfront about the situation and what you are trying to achieve. I would have thought that people working in sectors that warrant cadmium which makes up 60% what you are offering so it is not like it's just a bit of pigment on the connectors I have lying in my drawer would have access to this sort of solder as per regulations. I don't know how toxic it is that when somebody says toxic I assume it is unsafe to handle in such concentrations which is exactly what you do with solder wire so it's not the sort of thing I would expect to be sold off-the-shelf to just anybody. Yes there is a degree of we should not have a nanny state but if you do not know what you are handling you can easily mishandle dangerous products.

I expect that like lead cadmium is not allowed in most products because we can't be trusted to dispose of them properly or even trust the disposal mechanisms we do have. Granted my local tip is now called a recycling centre they send plenty of things to landfill that could be recycled and the only thing that stops them sending anything to landfill is the law. When I lived in Italy and I am sure it still goes on I used to run my hobby off of the things I would find dumped in the countryside. They were regular spots where people would go and fly tip which I knew of and would visit every few months to see if any goodies had turned up.

[xuda]

LTC AN-86  APPPENDIX-J    Page.47
http://cds.linear.com/docs/en/application-note/an86f.pdf

[Kleinstein]

Cadmum is considered to be quite toxic. For this reason Cd containing rechargeable cells get phased out in the EU. So no more new cells.
There are some restrictions on selling toxic chemical in the EU, I don't know the details, but it could be illegal to sell without proper documentation.


For most applications there is no need for an extra low EMF solder. Usually the temperature difference over the solder joint is very small. So unless one deals with DC in the low nV range there is no real need for Cd based solder. Regular Pb based solder is  not that bad either and it is still quite common and easy to get and you still have to expect Pb, but you don't have to expect Cd without special warnings.

[zhtoor]

Okay,Simon, I don't want to argue,respect your decision, you have the right to ban any person you think irregularities.

I am not a businessman, I am a serious semiconductor engineer. Just wanna try this solder in several experiment to get test data.
This solder wire is not recommended for general applications? I just want to help people who really need it. (Anyway, you never have to use. It's so rare,especially the wire shape. Most people who need it are in this section)
This material is not environmentally friendly, but it is not illegal.  This thread is just a order aggregation thread~~(but NOW OVER)

I saw disdain for the Chinese in your lines and I am not happy about it.  so disappointed~

I hope it is a misunderstanding,thank you!

BG5TOX(XuDa)

hello,

i second that.

if the "Global Moderator"'s rules required to ban this user, it could have been done in a (much more) civilized manner.

regards.

-zia

[Simon]

Yes solder is readily available although I believe the rules are special sectors only like military or hobby work. Basically they have tried to remove it from mass produced consumer goods which will end up in landfill. Yes I would expect that in Europe you would need some sort of licence to buy cadmium in such concentration. I have never seen cadmium solder for sale and like I said I have a hard time just getting customers to use connectors which have cadmium pigment.

[Simon]

Okay,Simon, I don't want to argue,respect your decision, you have the right to ban any person you think irregularities.

I am not a businessman, I am a serious semiconductor engineer. Just wanna try this solder in several experiment to get test data.
This solder wire is not recommended for general applications? I just want to help people who really need it. (Anyway, you never have to use. It's so rare,especially the wire shape. Most people who need it are in this section)
This material is not environmentally friendly, but it is not illegal.  This thread is just a order aggregation thread~~(but NOW OVER)

I saw disdain for the Chinese in your lines and I am not happy about it.  so disappointed~

I hope it is a misunderstanding,thank you!

BG5TOX(XuDa)

hello,

i second that.

if the "Global Moderator"'s rules required to ban this user, it could have been done in a (much more) civilized manner.

regards.

-zia

They are not the global Moderator's rules they are the admins rules i.e. Dave. I'm not quite sure what was uncivilised about the banning. If I deem a poster to be breaking the rules or otherwise disrupting the forum I simply click ban on their profile there is no civilised or uncivilised way of doing it. I click ban on their profile. I could have locked the topic and that would be the end of that but because I didn't want to be uncivilised I left it open for discussion and I have not banned the returned original poster and in allowing the discussion to continue. How more civil due want me to be? I don't know what the rules in China are about such substances but in the EU you can't just sell this stuff over-the-counter which is what made the original post look even more dodgy.

[zhtoor]

lets see if you can BAN these:-

http://uk.farnell.com/search?st=cwt%20solder%20sleeve

do look into the composition of these solder joint sleeves.

as far as being civilized goes, here is a sample:-

"Dear Sir,

you are not allowed to post a sales pitch for any product on your first post.
this requires immediate ban of the poster as per the forum's rules.

regards.

Simon"

-zia

[Simon]

lets see if you can BAN these:-

http://uk.farnell.com/search?st=cwt%20solder%20sleeve

do look into the composition of these solder joint sleeves.

So what about their composition then? There is a difference between products that require special handling and knowledge and products that contain a quantity of substance that in some situations is not acceptable to use. For example the raychem 44 wire that I use on military wiring looms. Wonderful stuff just don't be near it if it smoulders because it contains halogens. It's not a band wire type but it is for particular uses only. If I was making something for a train and told them that I wanted to use raychem in 44 they would probably want to hang draw and quarter me because the rules of such industry dictate that halogens must be limited and preferably not used.

I once worked on a project where my boss wanted to put a nice acrylic panel on the unit. The customer nearly hit the roof when he suggested it. Acrylic is not banned but it is not acceptable for use in certain circumstances.

[zhtoor]

So what about their composition then?

it contains 18% CADMIUM ! (the CWT series) and is being sold in UK - off the shelf !!!

regards.

-zia