Key Specifications & Composition
- Alloy Mix: Typically a eutectic 63% Tin (Sn) / 37% Lead (Pb) composition. (Note: Some listings mistakenly tag it as lead-free, but expert breakdowns confirm it is a classic leaded alloy.)
- Melting Point: 183°C (361°F), which is the lowest possible melting point for tin-lead alloys, ensuring fast welding and less thermal stress on delicate components.
- Flux Content: Integrated rosin core with a 1.0% to 3.0% flux ratio.
- Expansion Rate: 75%, allowing for highly reliable, bright, and full solder joints.
- Available Diameters: Comes in super-fine sizes including 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, and 1.2mm.
- Standard Packaging Weight: Usually sold in 55g or 100g spools.



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