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

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.

COMPLEMENTARY AUFHAUSER PRODUCTS

• Brazing Flux