Silver Braze 38

AWS: BAg-34

SB 38 is a good general purpose low temperature brazing filler metal for use in cadmium-free brazing applications, such as air conditioning and refrigeration which involve the joining of steels, copper, copper alloys and nickel alloys.

Available Forms

Wire, strip, engineered preforms, specialty preforms per customer specification, powder and paste.


SB 38 is a free-flowing, low temperature filler metal with excellent wetting characteristics of most ferrous and non-ferrous base metals, and is a good substitute for cadmium-bearing filler metals with similar silver content. The material is best suited for narrow gap situations (0.001” – 0.005” radial joint clearance). Flux should be used with this filler metal.


The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal. The results listed below were generated from brazed butt joints which were tested under standard room temperature conditions. Tensile Strength (lbs/in2) Low Carbon Steel: 55,000-65,000 304 Stainless Steel: 80,000-85,000 Copper: 31,000-35,000 Brass: 35,000-45,000 Elongation (%, 2” gage length) Low Carbon Steel: 8-13 304 Stainless Steel: 2-5 Copper: 25-35 Brass: 15-30


American Welding Society (AWS)



1200 F / 649 C


1330 F / 721 C


The information and recommendations contained in this publication have been provided without charge & compiled from sources believed to be reliable and to represent the best information available on the subject at the time of issue. No warranty, guarantee, or representation is made by the Prince and Izant Company, Inc. as to the absolute correctness or sufficiency of any representation contained in this and other publications; Prince and Izant Company, Inc. assumes no responsibility in connection therewith; nor can it be assumed that all acceptable safety measures are contained in this (and other publications, or that other or additional measures may not be required under particular or exceptional conditions or circumstances.

Silver Braze 38 AWS: BAg-34

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