C470 Naval Bronze


INTRODUCTION

Aufhauser Naval Bronze is a 1% tin-copper-zinc filler metal. The addition of tin improves strength and corrosion resistance in the weld deposit. Naval Bronze does not provide as high a weld strength as Low Fuming Bronze (RBCuZn-C, C681). A borax-boric acid flux such as Aufhauser Flux600 is generally required. Joint clearances should be 0.002" to 0.005" wide. Preheating may be desirable for some applications. A neutral or slightly oxidizing flames should be used.

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
  • Mobile equipment for simple on-site repair

METALS TO BE BRAZE WELDED

  • Steels, cast irons, copper alloys, nickel alloys and stainless steel

APPLICATIONS

Brazing or oxyacetylene welding of steel, cast iron, malleable iron, copper-bronze and nickel alloys.


GENERAL INFORMATION

Chemical Composition
Copper Aluminum Lead Tin Zinc
57.0-61.0 0.01 0.05 0.25-1.0 Remainder

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 1625 °F (885°C)
Solidification 1610 °F (877°C)
Tensile Strength 55,000 psi, avg.
Elongation in 2" 30%
Brinell Hardness 80
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8 Class RBCuZn-A
ASME SFA5.8 Class RBCuZn-A
QQ-R-571C
QQ-B-650
MIL-R-19631B Type RCuZn-A
MIL-B-7883
 
STANDARD SIZES AND DIAMETERS
Diameters Round Wire Rod
1/32", 1/16", 3/32", Not specified 18"
1/8", 5/32", 3/16",   36"
1/4", 5/16", 3/8"    
 
TYPICAL USES FOR ALLOY C470
Product Category Product Reason Category Reason
Industrial Brazing Rod and Wire Conductivity (Electrical) Electrical Conductivity

 

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Contact Us

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

  • Phone: +1-212-246-0205

  • Email: sales @ brazing.com