Silver solder paste recommendation

M

MCritchley

Stainless

Joined

Mar 22, 2007

Location

Brooklyn WI

• Sep 30, 2020

• #1

We are looking for a good silver solder paste that would be compatible with copper, brass, and, stainless. I used the paste quite often at a previous job with great success. My issue is that I have no idea what brand or type it was, the jar had no label! I didn't realize how many options there are out there, we are looking for something that is user friendly. We are doing thin walled parts and heating with a torch.

Any recommendations?

 

M

metalmaster1

Plastic

Joined

Apr 24, 2012

Location

antelope ca

• Sep 30, 2020

• #2

Harris Stay-Silv

 

M

MCritchley

Stainless

Joined

Mar 22, 2007

Location

Brooklyn WI

• Sep 30, 2020

• #3

metalmaster1 said:

Harris Stay-Silv

Click to expand...

I should have clarified, we are looking for the solder powder mixed with a paste flux. The solder and flux are pre applied to the joint before soldering, just add heat!

 

C

Cyclotronguy

Stainless

Joined

Sep 21, 2005

Location

Northern California

• Sep 30, 2020

• #4

Harris makes Ag powder, mix it with black flux as needed.

 

M

MattiJ

Titanium

Joined

May 31, 2017

• Sep 30, 2020

• #5

MCritchley said:

I should have clarified, we are looking for the solder powder mixed with a paste flux. The solder and flux are pre applied to the joint before soldering, just add heat!

Click to expand...

I tought that solder paste exist only in (soft) solder version but there also appears to be silver braze paste.
Item Requested Not Found

By silver solder I assume you mean silver braze? Not tin-silver soft solder?

About 50-50% changes to get it right when someone is talking about silver solder... either high temp silver braze with around 55% silver or low temp soft solder with 96% tin and 4% silver.

 

C

Cyclotronguy

Stainless

Joined

Sep 21, 2005

Location

Northern California

• Sep 30, 2020

• #6

I was sort of thinking BAg-8 Liquid at about 700C, pretty common for torch hard brazing of vacuum components.. ie stainless and copper

 

F

FredC

Diamond

Joined

Oct 29, 2010

Location

Dewees Texas

• Sep 30, 2020

• #7

I have a canister of POSTALLOY 70PA low temperature solder. Premixed with paste, 425F temp. Container says it is a good color match to stainless and stays shiny. It was give to me about 25 years ago. I did one repair with it back then and it worked. Not sure if it is still available. This container has separated. Not sure if it can be remixed and work.
Made by Postle Industries
Cleveland Ohio
Ph 216-881-2400

 

A

abarnsley

Titanium

Joined

Mar 24, 2005

Location

Palmer, Alaska

• Oct 2, 2020

• #8

Fusion brand.

Used it several times.
Not a long shelf life though.

Silver Brazing Paste | Alloys from Fusion Inc.

 

J

JustAbout

Aluminum

Joined

Apr 30, 2015

• Oct 2, 2020

• #9

abarnsley said:

Fusion brand.

Used it several times.
Not a long shelf life though.

Silver Brazing Paste | Alloys from Fusion Inc.

Click to expand...

I recommend Fusion as well. We've used a couple different types of their products and like them pretty well.

 

P

piedmontg

Aluminum

Joined

Dec 10, 2007

Location

NW Illinois

• Oct 2, 2020

• #10

You might want to try jewelry supply places, here is one I have dealt with:

Solder - Soldering & Joining | Contenti

Bob