I just acquired a prewar Ambrosio aluminum stem. It has a crack that I will need to repair so I can use the stem. When welding, there are different rods for different types of aluminum alloys. Does anyone know what modern aluminum (1100, 3003, 6061, etc.) would be compatible with a prewar cast aluminum? Or are there any you can eliminate? My guess would be more of a 3003 (general purpose) over a 6061 (high strength, stiff). Thank you.
Best regards,
David Beck
Crystal Lake, IL USA
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