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Welding/tigwelding/Tig Brazing of Aluminum& Brass to carbon steel

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Question
how to weld or braze which filler metal should be used for weldin or brazing of followings

1)carbon steel to brass
2)carbon steel to aluminum
3)brass to aluminum

Answer
The only material that can join all those metals directly is going to a Zinc alloy filler called zamak 3.
It is sold as a miracle rod, but is actually quite brittle and weak.


Brass is a copper/zinc alloy that should never be welded.
It can be silver soldered to itself, steel or stainless steel.

Steel and aluminum can never be welded directly to each other.
To join them we use "transition metal" strips.
Transition metals are made from 2 dissimilar metals that are explosively welded together.

Www.highenergymetals.com

These strips are used extensively in shipyards.

Any attempt to weld aluminum to any copper alloy will lead to disaster.
Aluminum and copper will alloy together to form aluminum bronze, which is incredibly hard and brittle.  

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Ernie Leimkuhler

Expertise

Questions about Oxy-Acetylene welding/cutting, MIG, TIG, Flux-core, Stick welding, brazing and soldering, bike frames, air frames, motorcycle frames, structural welding. Also questions about Welding Certifications and Inspections. All questions about fabrication of metals (stainless steel, steel , aluminum, brass, bronze, copper). Basic questions about underwater welding. TIG is my strongest subject.

Experience

Extensive background in most welding fields. 18 years fabrication of metal theatre scenery, 16 years structural steel, 2 years pipe welding, 9 years as a Welding Instructor at South Seattle Community College, and 5.5 years as a Welding Instructor at the Divers Institute of Technology. 16 years Industrial Welding Consultant for fabrication shops in the greater Seattle Area. 11 years Architectural Metal Fabrication. 8 years in Film/TV; SPFX/construction/set-deco/props/. 33 years Blacksmithing and Knifemaking. Currently a Field Welding Inspector for Otto Rosenau and Associates.

Organizations
American Welding Society - Certified Welding Inspector Washington Assoc of Building Officials (WABO) - Special Inspector - Structural and Reinforcing Steel.

Publications
Do a search on google groups for "Ernie Leimkuhler" in the rec.crafts.metalworking and sci.engr.joining.welding groups. http://www.stagesmith.com/ http://www.metalwebnews.com/ Blacksmith's Gazzette - Anvil Making

Education/Credentials
BA Theatre Technology - Purdue University.

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