C681 Low-Fuming Bronze


INTRODUCTION

Aufhauser C681 Low-Fuming Bronze, with its low melting point, is easily machinable and excellent for sheet metal work. This alloy possesses high tensile strength and good ductility. Weld deposits are non-porous, giving leak-proof joints for water, oil or gas lines. Quick wetting action provides a sound foundation for a dependable weld. The weld deposit rapidly changes from a fluid to a plastic state; it freezes fast. Preheating is required for some applications, and Aufhauser Brazing Flux is generally recommended. Joint clearances from 0.002 to 0.005 in. are suitable. Also available pre-coated with Aufhauser flux.

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

  • Production joining applications
  • Repairing broken or defective steel and cast iron parts
  • Repairing cast iron castings in the foundry
  • Machine shops, for correcting machining errors or modifying in-process parts
  • Maintenance departments and tool rooms for repairing tools and equipment
  • Mobile repair units (grain-harvesting crews, ship repairs)

GENERAL INFORMATION

Chemical Composition
Copper Aluminum Iron Lead Manganese Silicon Tin Zinc
56.0-60.0 0.01 0.25-1.2 0.05 0.01-0.50 0.04-0.15 0.8-1.1 Remainder

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

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 1630°F (888°C)
Solidification 1595°F (868°C)
Tensile Strength 65,000 psi
Elongation in 2" 25%
Brinell Hardness 96
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8 Class RBCuZn-C
ASME SFA5.8 Class RBCuZn-C
QQ-R-571C
MIL-R-19631B Type RCuZn-C
 
STANDARD SIZES AND DIAMETERS
Diameters: 1/16", 3/32", 1/8", 1/4", 3/8"
Rod Lengths: 18", 36"

 

TYPICAL USES FOR ALLOY C681
Product Category Product Reason Category Reason
Industrial Welding Rod for Cast Iron Welding Characteristics Weldability

 

 

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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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