Blockade® Brazing Alloy HARRIS

Blockade® is a specialized brazing alloy developed for low-temperature joining of copper and brass components. Its narrow melting range combined with smooth flow characteristics allows operators to cap or build up material around the finished joint when needed.

It is widely used for brass brazing because its lower operating temperature reduces the risk of overheating or damaging brass components. Blockade® is often selected as a replacement for high-silver brazing filler metals, offering significant cost savings since it contains no silver.

This alloy is not suitable for steel or other ferrous metals because phosphorus in the alloy forms brittle compounds with those materials. Phosphorus-containing brazing alloys should also be avoided where joints are exposed to sulfur or sulfur compounds during service.

Key Benefits

Designed for low-temperature copper and brass brazing
Smooth flow allows joint capping and build-up
Reduces overheating risk on brass components
Cost-effective replacement for silver brazing alloys
Provides strong and reliable brazed joints
Suitable for repair and production brazing work

Specifications

Product Name: Blockade®
Product Type: Copper-Based Brazing Alloy
Suitable Materials: Copper and brass
Recommended Use: Low-temperature brazing operations
Not Suitable For: Steel and ferrous alloys
Service Limitation: Not recommended where sulfur compounds are present
Chemical Composition: Silicon 0.01–0.40%, Tin 6.0–7.0%, Phosphorus 6.0–7.0%, Copper remainder, Other elements total 0.15%
Solidus Temperature: 1178°F (637°C)
Liquidus Temperature: 1247°F (674°C)
Brazing Range: 1200°F to 1280°F (649°C to 693°C)
Density: 0.293 lb/cu in

Applications

Copper tubing and fitting brazing
Brass component fabrication and repair
HVAC and plumbing copper assemblies
Industrial copper and brass joining operations
Maintenance and production brazing work

FAQs

Can Blockade® replace silver brazing alloys?
Yes, it is commonly used as a cost-effective alternative for copper and brass brazing.

Can it be used on steel components?
No, it is not recommended for steel or other ferrous metals due to brittle compound formation.

Why is it suitable for brass brazing?
Its lower melting temperature helps reduce overheating risk during brazing.

Can it be used where sulfur exposure occurs?
No, phosphorus-containing alloys should not be used where sulfur or sulfur compounds are present.