C521 Phosphor Bronze C


INTRODUCTION

Aufhauser Phosphor Bronze C filler metal is used quite extensively for surfacing applications. The higher tin content, at 7-9%, gives Phos-Bronze C weld deposits greater hardness and higher tensile/yield strength than C518 (Phos-Bronze A). When gas tungsten arc welding with Phos-Bronze C, preheating is recommended.

APPLICATIONS

  • Joining brass and bronze alloys and joining cast iron to carbon steel.
  • Phos-Bronze C is harder and stronger than Phos-Bronze A and should be used for welding phosphor bronzes, high strength bronzes and brasses. The alloy's color matches phosphor bronze well.

GENERAL INFORMATION

Chemical Composition
Copper Iron Lead Phosphorus Tin Aluminum Zinc
Remainder 0.10 0.05 0.03-0.35 7.0-9.0 0.01 0.20

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 1880°F (1027°C)
Solidification 1620°F (882°C)
Density at 68°F 0.318 lb/in³
Electrical Conductivity at 68°F 13.0 %IACS
Thermal Conductivity at 68°F 36 Btu
Electrical Resistivity at 68°F 79.8 ohms-cmil/ft
Modulus of Elasticity-Tension 16,000 ksi
Modulus of Rigidity 6,000 ksi
Specific Heat Capacity at 68°F 0.09 btu/lb/°F
Specific Gravity 8.8
Elongation in 2" 33%
Rockwell B Hardness 85
 
FABRICATION PROPERTIES
Joining Technique Suitability
Soldering Excellent
Brazing Excellent
Oxacetylene Welding Fair
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Fair
Spot Weld Good
Seam Weld Fair
Butt Weld Excellent
Capacity for Being Cold Worked Good
 
SPECIFICATIONS MEET OR EXCEED
N/A

 

STANDARD SIZES AND DIAMETERS
Size Cast
(12" Spool)
Helix
(12" Spool)
3/32 or 1/8 x 36" rod N/A N/A
.035" dia. x 30 lb. spl 15-40" < 1"
.045" dia. x 30 lb. spl 15-40" < 1"
.062" dia. x 30 lb. spl 15-40" < 1"

 

GMAW (MIG) Parameters (DC Reverse Polarity) Electrode Positive Spray transfer
Wire Diameter Amps Volts Argon (cfh) Wire Feed (ipm)
0.030 130-140 25-26 25 340-450
0.035 140-160 26-27 30 280-400
0.045 165-185 27-28 30 200-300
1/16 285-335 28-30 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" 100-120 100-120 3/8-1/2 15
3/32"-1/8" 3/32" 3/32" 185-205 165-195 7/16-1/2 15
3/16"-1/2" 1/8" 3/32"-1/8" 300-350 255-300 7/16-1/2 20
1/2"-1" 3/16" 1/8" 615-640 440-485 1/2 25

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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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