Stay-Silv® 15 Brazing Alloy HARRIS

Stay-Silv® 15 brazing filler metal is commonly selected for brazing copper connections, particularly in air conditioning and refrigeration systems. Its wide melting range allows operators to fill loose joints and cap around finished connections, while heating above the liquidus temperature allows the alloy to flow efficiently into tight connections.

The alloy may also be used to braze brass components when proper brazing flux is applied. It is generally suitable for copper and copper-nickel base metals containing up to approximately 10% nickel.

However, the alloy is not recommended for brazing steel or other ferrous metals due to insufficient joint ductility. Phosphorus-containing alloys should also be avoided where brazed joints are exposed to sulfur or sulfur compounds during service.

Key Benefits

Ideal for copper brazing in HVAC and refrigeration systems
Wide melting range supports joint filling and capping
Flows efficiently into tight joints when fully heated
Suitable for brass brazing with proper flux use
Provides strong and dependable copper joint performance
Available in multiple product forms for installation flexibility

Specifications

Product Name: Stay-Silv® 15
Product Type: Copper-Phosphorus-Silver Brazing Alloy
Suitable Materials: Copper, brass with flux, and low nickel copper alloys
Self-Fluxing Feature: Yes, for copper-to-copper brazing
Not Suitable For: Steel and ferrous metals
Corrosion Behavior: Similar to copper base metal; avoid sulfur exposure
Recommended Flux: No flux required for copper; Stay-Silv® white or ECO SMART® flux recommended for brass applications
Available Forms: Standard wire diameters, strip, preform rings, and spooled wire
Specification Compliance: ANSI/AWS A5.8 Class BCuP-5, ASME SFA 5.8 Class BCuP-5, QQ-B-654A BCuP-5, ISO 17672 CuP 284

Applications

Air conditioning and refrigeration piping brazing
Copper tubing and HVAC installations
Copper plumbing assembly work
Maintenance and service brazing operations
Brass component brazing with flux application

FAQs

Is Stay-Silv® 15 self-fluxing?
Yes, it is self-fluxing when brazing copper-to-copper joints.

Can it be used for brass brazing?
Yes, but appropriate brazing flux should be used.

Can it be used on steel?
No, it is not recommended for ferrous metals due to limited joint ductility.

Can it be used where sulfur exposure occurs?
No, phosphorus-containing alloys should not be used in sulfur exposure environments.