Meltolit 9730 Metal paste
Copper-alloyed soft solder metal paste for copper, copper alloys, steel and stainless steel used mainly in HVAC and refrigerant industry but also for car body work Working temp: 250-350°C
Copper alloy with 15% silver and 5% phosphor primarily used for brazing of copper pipes and HVAC connections. Meltolit 15P can be used for brazing in copper, brass and in some extent steel. Its composition provides high ductility, excellent fluidity, low melting point and excellent resistance to vibration.
When brazing brass or copper to brass you need a separate flux, Meltolit 770.