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I. brand and performance of silver-based copper phosphorus environmental protection solder (silver copper phosphorus solder)

(1) hag-2b contains silver 2, which is equivalent to AWS bcup-6, bcu91pag and L209. It has good fluidity and filling capacity. It is widely used in air conditioning, refrigerator, mechanical and electrical industries, copper and copper alloy brazing. Melting point 645-790 ℃.

(2) hag-5b containing silver 5 is equivalent to AWS bcup-3, bcu88pag and l205. It has certain plasticity and is applicable to the welding of copper and its alloy joints which can not maintain close cooperation. Melting point 645-815 ℃. (3) hag-15b containing silver 15 is equivalent to AWS bcup-5, bcu80agp and l204. It has good joint plasticity, improved conductivity, and is especially suitable for occasions with uneven gap. Braze welding of copper and its alloy joints under vibration load. Melting point 645-800 ℃.

II. Brand and performance introduction of silver-based copper zinc environmental protection solder (silver solder)

(1) Ag 18 in hag-18bsn is an alloy of silver, copper, zinc and tin, with a slightly higher melting range, good wettability and filling property, and economic price. Can weld copper, copper alloy, steel and other materials. Melting point 770-810 ℃.

(2) ag-25b is equivalent to national standard bag25cuzn and L302. It is a kind of silver, copper, zinc and alloy. It has good wettability and filling property, but its melting point is slightly higher. It can be used to weld copper, steel and other materials. Melting point 700-800 ℃.

(3) ag-25bsn containing Ag 25 is equivalent to AWS bag-37, which is an alloy of Ag, Cu, Zn and Sn. Its melting point is lower than that of hag-25b, which improves the wettability and filling ability. Solderable copper, steel and other materials. Melting point 680-780 ℃.

(4) Ag 30 in hag-30b is equivalent to AWS bag-20 and national standard bag30cuzn. It is a silver, copper and zinc alloy with slightly higher melting point and better toughness. It can be used for brazing copper, copper alloy, steel and other materials. Melting point 677-766 ℃.

(5) Ag 35 in hag-35b is equivalent to AWS bag-35. It is a silver, copper and zinc alloy with medium melting temperature. The joint has good toughness and can be brazed with copper, copper alloy, steel and other materials. Melting point 621-732 ℃.

(6) ag-35sn is equivalent to the national standard bag34cuznsn. It is an alloy of Ag, Cu, Zn and Sn. It has medium melting temperature and good fluidity. It is more suitable for the welding of ferritic and non ferritic steels. Melting point 620-730 ℃.

(7) ag-40b is a kind of silver, copper, zinc and alloy with good fluidity, permeability and toughness, melting point of 677-732 ℃.

(8) Ag 40 in hag-40bni is an alloy of silver, copper, zinc and nickel, which is equivalent to AWS bag-4. It has good corrosion resistance and is suitable for welding stainless steel and nickel base alloy and tungsten carbide, with a melting point of 670-780 ℃.