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A 50/50 solder is a combination of lead and which metal?

Copper

Zinc

Antimony

Tin

50/50 solder is a lead-tin alloy—half lead, half tin. Tin is the metal paired with lead to create a solder that melts at a relatively low temperature and wets copper surfaces well, which is essential for joining HVAC copper tubing reliably. Copper, zinc, and antimony aren’t part of this classic composition, though they show up in other solders.

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