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
For applications with high operating temperatures exposed to corrosive attacks like EGR coolers for trucks, jet engine parts etc. The alloy is similar to Meltolit 300 but Bor-free so its also used in some nuclear applications.