Luois Metals, a reputable manufacturer and supplier located in Houston, USA, specializes in high-quality Silver Brazing Rods tailored for precision joining applications across various industries. These rods are crafted with rigorous quality controls to guarantee exceptional strength, reliability, and smooth flow characteristics during the brazing process. Renowned for their outstanding capillary action and robust metallurgical bonding, Silver Brazing Rods create clean, durable joints that boast excellent corrosion resistance. Luois Metals is committed to ensuring that its Silver Brazing Rods comply with international standards, catering to sectors like HVAC, automotive, aerospace, electrical, and general engineering with reliable solutions.
The composition of Silver Brazing Rods primarily includes silver, copper, and zinc, with optional additions of tin, cadmium-free formulations, or other elements based on the specific grade. The high silver content provides remarkable fluidity, strength, and corrosion resistance, while copper and zinc enhance bonding and lower the melting temperature. These rods showcase impressive mechanical properties, such as high tensile strength, good ductility, and resistance to vibration and thermal cycling. Their capability to create strong, leak-proof joints makes them ideal for both ferrous and non-ferrous metals, ensuring consistent and long-lasting performance in critical applications.
Silver Grade of Brazing Alloy | Nominal Composition % | Melting Range | International Standards | |||||
Ag | Cu | Zn | Cd | Others | °C |  DIN:8513 | AWS:A5.8 | |
| SILVER 67Cd | 67 | 11 | 12 | 10 | – | 635-720 | L-Ag67Cd | – |
| Used for brazing of silver goods made of silver alloys. | ||||||||
| SILVER 50Cd | 50 | 15.5 | 16.5 | 18 | – | 620-640 | L-Ag50Cd | BAg-1a |
| One of the lowest melting point Silver Brazing alloys available. It has excellent flow characteristics. The highest joint strength can be obtained with this alloy. Has better resistance to corrosion in chlorine, sulphur and steam environments. | ||||||||
| SILVER 45Cd | 45 | 15 | 16 | 24 | – | 605-620 | L-Ag45Cd | BAg-1 |
| This has the lowest brazing temperature range of the BAg filler metals. It also flows more freely into narrow clearance capillary joints. Its narrow melting range is suitable for rapid or slow methods of heating. | ||||||||
| SILVER 44Cd | 44 | 27 | 13 | 15 | 1P | 595-660 | – | – |
| Low melting filler metal for brazing electrical contacts and molybdenum or copper-tungsten electrodes. | ||||||||
| SILVER 43Cd | 43 | 16 | 20 | 21 | – | 615-620 | – | – |
| This has the shortest melting range of any silver brazing alloys. This alloy is regarded as the best brazing alloy by manu brazers. It is particularly recommended where a minimum brazing temperature is desirable to preserve the properties of the parent metals. Ideal where joints have a close fitup and will produce neat joints with optimum ductility and strength. | ||||||||
| SILVER 40Cd | 40 | 19 | 21 | 20 | – | 595-630 | L-Ag40Cd | – |
| SILVER 35Cd | 35 | 26 | 21 | 18 | – | 610-700 | L-Ag34Cd | BAg-2 |
| A free flowing general purpose brazing alloy. Its broader melting range is helpful where clearances are wide or are not uniform. Unless heating is rapid, care must be taken that the lower melting constituents do not separate out by liquation. | ||||||||
| SILVER 30Cd | 30 | 28 | 21 | 21 | – | 600-690 | L-Ag30Cd | BAg-2 |
| Similar to Silver 40Cd but more economical. | ||||||||
| SILVER 251Cd | 25 | 30 | 27.5 | 17.5 | – | 605-680 | – | BAg-33 |
| Silver 251, 250 & 20Cd have good fillet forming properties with an ability to bridge wide gaps. Their wide melting range limit their applications. Due to their wide melting range they are somewhat more subject to liquation and may require more care during brazing. Therefore, they are not normally recommended for applications with slow heating rates. | ||||||||
| SILVER 250Cd | 25 | 35 | 26 | 14 | – | 605-745 | – | BAg-27 |
| SILVER 20Cd | 20 | 40 | 25 | 15 | – | 605-765 | L-Ag20Cd | – |
| SILVER 12Cd | 12 | 50 | 31 | 7 | – | 620-825 | L-Ag12Cd | – |
| Economical alloy with wide melting range. Like above, preferred for applications having short heating cycles to avoid liquation. Ideal for bridging wider gaps where work pieces are insensitive to heat. | ||||||||
| SILVER 5Cd | 5 | – | – | 7 | – | 335-392 | – | – |
| Used where alloy having higher melting point and better strength than soft solder is required. | ||||||||
| C | Si | Mn | P | S | Cr |
| 95/1.25 | .40 max. | .37 | .045 max | .045 max. | .35 / .45 |
Silver brazing rods generally do not require corrosion protection coatings for most applications. However, in highly corrosive environments, additional coatings or protective measures may be beneficial to prevent degradation.
Silver brazing rods are not designed for welding, as they are intended for brazing. Attempting to weld them can result in poor joint strength and structural integrity.
When installing silver brazing rods, ensure the joint surfaces are clean and properly prepared for effective bonding. Also, control the heating process to avoid overheating or damaging the material.
Silver Brazing Rods are extensively utilized for joining copper, brass, nickel, steel, and stainless steel components in HVAC and refrigeration systems, plumbing, and electrical connections. They play a crucial role in the aerospace and automotive industries for fabricating high-strength, leak-tight joints that endure vibration and thermal stress. Furthermore, these rods are essential in tool manufacturing, precision instruments, and general engineering applications where durability and reliability are paramount. Luois Metals guarantees that its Silver Brazing Rods provide clean, strong, and durable joints, making them the go-to choice for industries that demand high-performance brazing solutions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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