C680 Low-Fuming Bronze Nickel


INTRODUCTION

Aufhauser C680 Low-Fuming Bronze Nickel is similar to Naval Bronze (C470). The addition of iron and manganese increases the hardness and strength of the weld deposit, while nickel ensures uniform distribution of iron in the deposit. A boric acid or borax type flux such as Aufhauser Flux600 is recommended. A neutral or slightly oxidizing flame should be used. Preheating may be required for some applications. Also available pre-coated with the appropriate flux.

MAJOR 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

  • Braze or oxyacetylene welding of steel, cast iron, brass and bronze
  • Building up wearing surfaces and bearings

GENERAL INFORMATION

Chemical Composition
Copper Lead Iron Tin Zinc Nickel Aluminum Maganese Silicon
56.0-60.0 0.05 0.25-1.25 0.75-1.10 Remainder 0.20-0.80 0.01 0.01-0.50 0.04-0.15

Note: Copper contains Silver; Nickel contains Cobalt. All values are maximum percentage, unless shown in range.

PHYSICAL and MECHANICAL PROPERTIES
Melting Point 1620°F (882°C)
Solidification 1590°F (866°C)
Density at 68°F 0.296 lb/in³
Specific Gravity 8.19
Tensile Strength 65,000 psi
Elongation in 2" 25%
Brinell Hardness 92
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8 Class RBCuZn-B
ASME SFA5.8 Class RBCuZn-B
QQ-R-571C
MIL-R-19631B
 
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 C680
Product Category Product Reason Category Reason
Industrial Welding Rod for Cast Iron Conductivity (Electrical) Electrical Conductivity
  Welding Rod for Cast Iron Conductivity (Thermal) Thermal Conductivity
  Welding Rod for Cast Iron Corrosion Resistance Oxidation Resistance

 

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.

 
COMPLEMENTARY AUFHAUSER PRODUCTS

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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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