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1) How to Braze Carbon Steel and Low Alloy Steels

When using silver-based solder, BAg45CuZn, BAg40Cd, BAg50Cd and BAg40CuZn brazing material are mainly used. The performance of silver-based brazing material is good and the brazing temperature is lower than that of copper base solder. Moreover, the steel surface has good spreading with better strength and plasticity of brazing head. For example, with the BAg50Cd solder brazing low carbon steel joint strength is up to 294MPa.

2) How to Braze Stainless Steel

Silver-based solder is the most commonly used brazing material for brazing stainless steel, out of which silver copper, zinc and silver, copper, zinc and cadmium solder are the most widely used. Brazing stainless steel using silver-based solder can be selected Bag40, bag45, bag50, bag40cd. Among them, Silver copper zinc and silver copper and zinc cadmium because the brazing Wen Fang is not too high, so the performance of the base material has little impact. These solders are easy to cause grain boundary precipitated carbide at brazing temperature.

3) How to Braze Tool Steel and Cemented Carbide

Silver-based solder has good strength, plasticity, low melting point, small thermal stress produced by Brazing head, and hard to crack cemented carbide. Among them, the Bag50ni solder has excellent wettability to cemented carbide, high strength, heat resistance and good brazing Head comprehensive performance.

4) How to Braze Cast Iron

Any brazing material suitable for iron or steel can be used for brazing cast iron. However, it is more appropriate to use silver-based solders with lower learning points and silver-based solders containing nickel have greater affinity for cast iron, thus obtaining higher strength connectors. Copper and copper zinc solders can also be used, but because of their large temperature range, they must be used with great care. Phosphorus-containing copper-based solders are not suitable for cast iron because they produce brittle iron-phosphorus compounds that make the joints brittle.

Silver-based brazing material can be used: BAg50CdNi, BAg54Ni

Copper and zinc brazing materials can be used: BCU60ZNSN, BCu58Zn

5) How to Braze Copper and Its Alloys

Copper and Copper alloys can form brazing connectors with a variety of metal alloys, such as electronic components, circuit boards, microwave and other communication devices, vacuum devices, wire and cable, instrumentation components, heat exchangers and a variety of containers, pipelines and so on.

In copper and zinc solder, copper phosphorus, silver phosphorus and copper phosphorous solder (BCU93P,BCU80AGP,BCU89PAG), with self-brazing agent or without brazing agent on copper has a good wettability (brazing brass still need to add brazing agent). Among them, the joint plasticity of silver copper phosphorus and copper phosphorus tin solder is better.

By brazing copper and brass with silver solder, a well-performing joint can be obtained. In these silver solders, the BAG45CUZN brazing material is one of the best comprehensive performers. Silver copper and zinc cadmium solder melting point is low. The workmanship is good and the joint strength is high, but the toughness of the joint is lower than the silver solder without cadmium.

6) How to Braze Copper and Other Metals

It is easy to braze between heterogeneous copper alloys. Copper and Copper Alloys can be brazed with a variety of metals and their alloys, such as carbon steel, low alloy steel, austenitic stainless steel, cast iron, tool steel, nickel and nickel alloys, titanium and titanium alloys, active metals, refractory metals and other use of silver-based brazing materials. Copper and aluminum can also be brazed. However, Copper, Magnesium and Magnesium Alloys can never be brazed.

Brazing of Copper and Copper Alloys can be selected: BAG, BCU, BCUP, BCUZN.

Brazing of Copper and Aluminum Alloys: BAL-SI.

Copper and Carbon Steel and Low Alloy Brazing Steel can be selected: BAG, BAU, BCUZN

Brazing of Copper and Cast Iron can be selected: BAG, BAU, BCUZN

Brazing of Copper and Stainless Steel can be selected: BAG, BAU

Brazing of Copper and Titanium and Titanium alloys can be selected: BAG

Brazing of Copper and Active Metals selectable: BAG

Brazing of Copper and Refractory Metals selectable: BAG

Brazing of Copper and Tool Steel: BAG, BAU, BCUZN, BNI

7) How to Braze Ceramic and Metal Connections (Commonly Used Silver Brazing Materials)

Ceramic and metal connections commonly used silver brazing materials. Joining ceramics and metal components is difficult in the use of brazing and diffusion welding. The traditional brazing method is to pre-metallize the ceramic surface, so that the non-metallic ceramics are joined to the metal surface. This method is complex, time-consuming and costly. In recent years, the direct brazing technology of ceramics has developed rapidly, which can make the joining process of ceramic components relatively simple, and can meet the requirements of high temperature environment.

AG50: content “Ag50, Cu50”, Melting point :889℃

AG72: content “Ag72, Cu28”, Melting point:779℃

and ceramics, ceramics and metal components of the connection is difficult


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Guangzhou Zhenhu Welding Consumables Co. Ltd
Guangzhou Zhenhu Welding Consumables Co. Ltd.
Contact : MS. SANDY WANG Mobile / WhatsApp / WeChat: +86 136 8889 5094
Room 50, No.98 West Fangcun Avenue, Liwan District, Guangzhou 510360, China
HK: FLAT/RM 14,29/F, HO KING COMMERCIAL CENTER, 2-16 FA YUEN STREET, MONGKOK, HK
Tel. +86 20 8167 6480 Mobile: +86 136 8889 5094 / +86 139 2604 2761