Specifications

1. For ferrous, nonferrous, and dissimilar metals and alloys with close joint clearances.
2. High silver content

DESCRIPTION:

HUAZHONG HZ-Ag72B silver brazing alloy is a eutectic composition of the silver copper system. It is suitable for use in a controlled atmosphere brazing without the use of a paste flux. When molten, HZ-Ag72B is very fluid and may flow out over the work surfaces during some furnace brazing applications. The wetting action on ferrous metals is limited, minimizing its use on carbon steel. Improved wetting observed when furnace brazing of stainless steel with silver copper filler metals. Most applications for this alloy are on copper and nickel based alloys.

 

PROPERTIES OF BRAZED JOINTS:

Generally, the joint strength using HZ-Ag72Bsurpasses the strengths of the base metals. Strength is a function ofthe base metals being joined, type of joint, design of joint, joint clearances and brazing procedures. Therecommended maximum operating temperatures for HZ-Ag72B is up to 204°C(continuous service) and 315°C (intermittent service). Where improved corrosion resistance is needed, nickel may be added to the eutectic composition.

 

APPLICATIONS:

Typical applications are the joining of ferrous, nonferrous, and dissimilar metals and alloys with close joint clearances.

 

SPECIFICATIONS:

AWS A5-8 BAg-8                           

ASME BAg-8

Chemical Compositions(%):Ag72, Cu28.

Solidus: 779°C

Liquidus: 779°C

Working Temp.:770-900°C

Specific Gravity 9.06                        

Density (lb/cu in) 5.25

Electrical Conductivity (% IACS) 87.0         

Electrical Resistivity (Michrohm-cm) 2.00

Color White

 

AVAILABLE FORMS:

Standard forms of HZ-Ag72B are wire, rod, ring, strip and preforms.