C189 Deoxidized Copper


INTRODUCTION

Aufhauser C189 Deoxidized Copper is a filler metal containing 98% copper and small amounts of phosphorus and silicon. The C189 alloy is easy flowing and produces weld deposits that are porosity free, electrically conductive, and copper-color matched. The oxyacetylene gas flame must be neutral or slightly oxidizing. Tip size must be one to two sizes larger than the base plate. Preheating should be done only if the part is thick. A boric acid or borax flux such as Aufhauser Flux600 is recommended.

APPLICATIONS

  • Joining deoxidized copper, electrolytic tough pitch copper and repair weld copper castings with MIG, TIG, and oxyacetylene welding processes
  • Welding galvanized steel and deoxidized copper to mild steel where high strength joints are not required
  • Overlaying steel surfaces to resist corrosion
  • Joining copper pipes, tanks and copper fittings

GENERAL INFORMATION

Chemical Composition
Copper Aluminum Phosphorus Lead Manganese Silicon Tin Others
98.0 0.01 0.15 0.02 0.5 0.5 1.0 0.5

PROPERTIES OF BRAZED JOINTS

Generally, the joint strength produced by C189 Deoxidized Copper will surpass the strengths of the base metals. Strength is a function of the base metals being joined, type of joint, design of joint, joint clearances and brazing procedures. The recommended maximum operating temperatures for joints brazed with this alloy is approximately 500°F (continuous service) and 900°F (intermittent service). Corrosion resistance is satisfactory except when the joint is in contact with sulfurous atmosphere (especially at elevated temperatures).

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 1967°F (1075°C)
Density at 68°F 0.322 lbs./in³
Electrical Conductivity at 68°F 30.0% IASC
Thermal Conductivity at 68°F 75.0 Btu
Electrical Resistivity at 68°F 34.6 Ω-cmil/ft
Specific Gravity 8.91
Specific Heat Capacity at 68°F 0.09 Btu/lb/°F
Tensile Strength 25,000 psi, min.
Elongation in 2" 29%
Rockwell F Hardness 25
 
STANDARD SIZES AND DIAMETERS
Size
Cast
(12" Spool)
Helix
(12" Spool)
3/32 or 1/8 x 36" rod N/A N/A
0.035" dia. x 30 lb. spl 15-40" < 1"
0.045" dia. x 30 lb. spl 15-40" < 1"
0.062" dia. x 30 lb. spl 15-40" < 1"
 
SPECIFICATIONS MEET OR EXCEED
AWS A5.7 Class ERCu
ASME SFA5.7
QQ-R-571C, MIL-R-19631B Type MIL-RCu-2
MIL-C-19654 (MIL-RCu-C)
 
GMAW (MIG) Parameters (DC Reverse Polarity) Electrode Positive Spray transfer
Wire Diameter Amps Volts Argon (cfh) Wire Feed (ipm)
0.030" 130-150 21-23 25 460-500
0.035" 145-185 23-25 30 400-440
0.045" 195-215 26-28 30 280-310
1/16" 260-280 27-30 40 150-210
 
GTAW (TIG) Parameters (DCSP)² Electrode negative or ACHF
Material 2% Thoriated² Filler Wire Size Amps (DC) Amps (AC) Gas Cup Argon (cfh)
1/16" 1/16" 1/16" 70-150 70-150 3/8-1/2 15
3/32"-1/8" 3/32" 3/32" 150-200 140-230 7/16-1/2 15
3/16"-1/2" 1/8" 3/32"-1/8" 230-400 225-320 7/16-1/2 20
1/2"-1" 3/16" 1/8"-1/4" 325-500 290-485 1/2 25
 
FABRICATION PROPERTIES
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Excellent
Gas Shield Arc Welding Excellent
Coated Metal Arc Welding Good
Spot Weld Fair
Seam Weld Not Recommended
Butt Weld Excellent
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Excellent
Machinability Rating 20
 
COMMON FABRICATION PROCESSES
Welding

 

 

TYPICAL USES FOR ALLOY C189
Product Category Product Reason Category Reason
Industrial Welding Rod and Wire Conductivity (Electrical) Electrical Conductivity
  Welding Rod and Wire Conductivity (Thermal) Thermal Conductivity
  Welding Rod and Wire Corrosion Resistance Corrosion Resistance
Ordnance Artillery Projectile Rotating Bands, Welded Corrosion Resistance Corrosion Resistance
  Artillery Projectile Rotating Bands, Welded Friction & Wear Properties Galling Resistance
  Artillery Projectile Rotating Bands, Welded Mechanical Properties High Strength
  Artillery Projectile Rotating Bands, Welded 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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