Description
⚙️ Harris Phos-Copper Brazing Rod Technical Data
Harris is a world leader in brazing and soldering products, and their key selling points revolve around quality, consistency, and a full range of specialized alloys tailored for specific professional applications, particularly in HVAC/R and plumbing.Harris offers Phos-Copper alloys with varying silver content (0%, 2%, 5%, 15%) to adjust the melting range and fluidity for different joint tolerances.
| Alloy Name | Nominal Silver Content | AWS Classification | Solidus Temperature | Liquidus Temperature | Brazing Temperature Range | Key Property / Use |
| Harris® 0 | 0% | BCuP-2 | 1310^F
(710^C) |
1475^F
(802^C) |
1300^
1500^F |
Most economical. Very fluid, requires close joint clearance (0.002″ – 0.005″). |
| Stay-Silv® 5 | 5% | BCuP-3 | 1190^F
(643^C) |
1500^F
(816^C) |
1300^
1500^F |
Medium ductility. Wider melting range handles looser fit-up (0.002″ – 0.007″). |
| Stay-Silv® 15 | 15% | BCuP-5 | 1190^F
(643^C) |
1475^F
(802^C) |
1300^
1500^F |
Highest ductility. Excellent gap filling, handles high vibration/thermal expansion. HVAC/R standard. |
🔬 Compositional and Physical Properties
Chemical Composition (Nominal)
| Alloy | Silver (Ag) | Phosphorus (P) | Copper (Cu) | AWS Class |
| Harris® 0 | 0% | 7.1\% | Balance | BCuP-2 |
| Stay-Silv® 5 | 5% | 6\% | Balance | BCuP-3 |
| Stay-Silv® 15 | 15% | 5\% | Balance | BCuP-5 |
Physical Properties (Typical for Harris® / BCuP-2)
-
Color: Bright Shiny Copper
-
Electrical Conductivity: 9.91% IACS (International Annealed Copper Standard)
-
Specific Gravity: 8.76
Key Limitations (Applicable to ALL Phos-Copper Alloys)
-
Self-Fluxing: Only when brazing copper to copper.
-
Flux Required: Stay-Silv® White Flux must be used when brazing brass or copper to brass.
-
Not Recommended For: Brazing steel or other ferrous metals (iron, nickel), as the phosphorus forms brittle compounds.
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Corrosion Note: Should not be used in service where the braze will be exposed to sulfur or sulfur compounds.
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