#30 is historically a modification of #35 with a further reduction in silver content resulting in a higher melting point and a longer melting range (185 ºF). #30 is used for brazing steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals. It is similar to #35 in performance although it contains less silver. Its broader melting range is helpful where clearances are not uniform. During melting, #30 passes from the solid state to mushy or a plastic state and progressively to a liquid. If heated slowly through this plastic state (1125-1310 ºF) the liquid portion may flow from the solid portion. This causes a separation of the alloy into a low temperature melting (fluid) portion and a high temperature melting (solid) portion. This phenomenon is called liquation. The high temperature melting portion will melt only above the normal brazing temperature of #30. For this reason, #30 should be heated rapidly through the melting range.
|Melting Pt.||1125 ºF
|Flow Pt.||1310 ºF
|Preform Options||Brazing Discs
|Resale Options||Brazing Rod
|Approx. Wire Length (BCuP/lb.) (BAg/Tr.oz)||275 in; 0.031 diameter
30 in; 0.093 diameter
65 in; 0.062 diameter
|Brazing Range||1310 to 1550 ºF
710 to 843 ºC
|Electrical Conductivity||31 % IACS|
|Electrical Resistivity||5.5 Micro ohm-cm|
Typical applications are the joining of ferrous, nonferrous and dissimilar metals and alloys close joint clearances.
Less silver than Sil. 35 at the expense of increased melt temperature and range.
Standard forms of Brazeit 30 are wire, strip and preforms.
#30 contains cadmium and therefore upon heating may produce toxic fumes. It is essential that adequate ventilation be provided so that personnel will not inhale gases and fumes while brazing. The operation and maintenance of brazing equipment or facility should conform to the provisions of American National Standard (ANSI) Z49.1, "Safety in Welding and Cutting." For more complete information refer to the Material Safety Data sheet for #30.
Bellman-Melcor distinguishes itself as a provider of premium quality brazing alloys at industry competitive prices. Our extensive inventory of brazing and soldering alloys ensures that in most cases your order can be available for immediate delivery.
- AMS: 4768
- AWS: BAg-2a
- Lucas: Easy-Flo 30
- PI: Silver Alloy 30
- UNS: P07300
- Brazing Temperature Range High: 1410 F / 766 C
- Brazing Temperature Range Low: 1360 F / 738 C
- Liquidus: 1310 F / 710 C
- Solidus: 1125 F / 607 C
- Ag: 30%
- Cu: 27%
- Zn: 23%
- Cd: 20%
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. The company and product names referenced herein are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners.