C773 Nickel Silver


INTRODUCTION

Aufhauser Nickel Silver is a low-fuming, cadmium-free bronze. It is an excellent replacement for high cost silver brazing alloys when higher brazing temperatures are acceptable. The weld deposits of Aufhauser Nickel Silver have very high tensile strength, good ductility and excellent corrosion resistance. Nickel Silver weld deposits are also machinable and work-harden when put into service. Suitable for tubular structures.

Nickel Silver is available pre-flux coated with the correct amount of flux. No dipping or preparatory work is necessary. Preheating may be desired for some applications. A neutral or slightly oxidizing flame is recommended. (Unsuitable for furnace brazing in a protective atmosphere.)

ADVANTAGES

  • Joints are made at lower temperature than in gas or arc welding
  • Minimizes thermal stress and distortion
  • Less susceptibility to cracking
  • Soft and ductile weld deposits
  • Easy machinability
  • Low residual stress
  • High strength fillets
  • Requires only simple, mobile equipment

APPLICATIONS

  • Brazing tungsten carbides, copper alloys, nickel alloys, stainless steels & carbon steels
  • Brazing or oxyacetylene welding of steel or cast iron where good color match is desired
  • Building-up or overlaying worn parts such as gear teeth, bearings, and valve seats

GENERAL INFORMATION

Chemical Composition
Copper Aluminum Nickel Lead Phoshporus Silicon Zinc
46.0-50.0 0.01 9.0-11.0 0.05 0.25 0.04-0.25 Remainder

Note: Copper contains Silver; Nickel contains Cobalt

ADDITIONAL INFORMATION

Copper and its alloys require a relatively high heat input with shortened welding time. Higher preheat temperatures and faster welding rates than for steel are necessary.

PHYSICAL and MECHANICAL PROPERTIES
Melting Point 1680°F (916°C)
Solidification 1665°F (907°C)
Tensile Strength 70,000 psi, avg.
Elongation in 2" 25%
Brinell Hardness 120
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8 Class RBCuZn-D
ASME SFA5.8 Class RBCuZn-D
DIN 8513 L CuNi10Zn42
QQ-R-571D
QQ-B-650 (BCuZn-D)
MIL-R-19631B Type RCuZn-D
 
STANDARD SIZES AND DIAMETERS
Diameters: 1/16", 3/32", 1/8", 3/16", 1/4"
Lengths: 18"or 36"
 
Aufhauser C773 Nickel Silver copper alloy

 

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  • Address:
    Aufhauser Corporation
    39 West Mall, Plainview, NY 11803 USA

  • Phone: +1-212-246-0205

  • Email: sales @ brazing.com

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