C618 Aluminum Bronze A-2


INTRODUCTION

Aufhauser Aluminum Bronze A-2 is an iron-bearing MIG and TIG filler metal that is excellent for building-up or overlaying metal for wear and corrosion resistant surfaces. Weld deposits exhibit high mechanical properties, tensile strength, yield strength and hardness. Aluminum Bronze A-2 is widely used as a filler metal to join dissimilar combinations, such as copper/bronze to steel.

APPLICATIONS

  • Joining aluminum bronze of similar composition: silicon and manganese bronze, high strength copper-zinc alloys, some copper-nickel alloys, ferrous metals and dissimilar metals.
  • Marine maintenance and repair welding of ship propellers, pump housings, rigging jacks, piston heads, bearings and many overlay or surfacing applications.

GENERAL INFORMATION

Chemical Composition
Copper Aluminum Iron Lead Silicon Zinc
Remainder 8.5-11.0 0.50-1.50 0.02 0.10 0.02

Note: Copper contains Silver

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 - Liquidus 1913°F (1045°C)
Melting Point - Solidus 1904°F (1040°C)
Density at 68°F 0.272 lb/in³
Electrical Conductivity at 68°F 13 %IACS
Thermal Conductivity at 68°F 37.0 Btu·ft/(hr·ft² °F)
Electrical Resistivity at 68°F 79.8 Ω-cmil/ft
Specific Gravity 7.53
Specific Heat Capacity at 68°F 0.09 Btu/lb/°F
Tensile Strength 60,000 psi, min.
Elongation in 2" 23%
Yield Strength 43,000 psi
Brinell Hardness 130-150
 
SPECIFICATIONS MEET OR EXCEED
AWS A5.7 Class ERCuAl-A2
ASME SFA5.7 ERCuAl-A2
QQ-R-571C
MIL-R-19631B Type MIL-R-CuAl-A2
MIL-W-6712
MIL-E-23765/3 (MIL-CuAl-A2)

 

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"

 

GMAW (MIG) Parameters (DC Reverse Polarity) Electrode Positive Spray transfer
Wire Diameter Amps Volts Argon (cfh) Wire Feed (ipm)
0.030 80-140 25-26 25 340-450
0.035 130-200 26-27 30 280-400
0.045 185-245 27-28 30 200-300
1/16 250-400 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" 80-120 80-120 3/8-1/2 15
3/32"-1/8" 3/32" 3/32" 145-205 145-195 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" 515-640 340-485 1/2 25

 

FABRICATION PROPERTIES
Soldering Fair
Brazing Good
Oxyacetylene Welding Not Recommended
Gas Shield Arc Welding Good
Coated Metal Arc Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Fair
Capacity for Being Hot Formed Good
Forgeability Rating 50
Machinability Rating 40
 
COMMON FABRICATION PROCESSES
Drawing
Hot Forging
Hot Pressing

 

 

TYPICAL USES FOR ALLOY C618
Product Category Product Reason Category Reason
Industrial Bearing Liners Corrosion Resistance Corrosion Resistance
  Bearing Liners Machining Characteristics Average Speed
  Bearing Liners Mechanical Properties Medium Load
  Bearings Corrosion Resistance Corrosion Resistance
  Bearings Corrosion Resistance Corrosion Resistance in Numerous Environments
  Bearings Corrosion Resistance Corrosion Resistance to Chemicals
  Bearings Friction & Wear Properties Wear Resistance
  Bearings Mechanical Properties High Strength
  Bearings Softening Resistance Resistance to Softening
  Bushings Corrosion Resistance Corrosion Resistance (Excellent)
  Bushings Machining Characteristics Average Speed
  Bushings Mechanical Properties Medium Load
  Pickling Hooks Corrosion Resistance Corrosion Resistance
  Pickling Hooks Corrosion Resistance Corrosion Resistance to Acids
  Pickling Hooks Machining Characteristics Average Speed
  Pickling Hooks Mechanical Properties Medium Load
  Pump Impellers Corrosion Resistance Corrosion Resistance
  Pump Impellers Machining Characteristics Average Speed
  Pump Impellers Mechanical Properties Medium Load
  Shafts Corrosion Resistance Corrosion Resistance
  Shafts Corrosion Resistance Corrosion Resistance in Numerous Environments
  Shafts Mechanical Properties High Strength
  Shafts Softening Resistance Resistance to Softening
  Tie Rods Corrosion Resistance Corrosion Resistance
  Tie Rods Corrosion Resistance Corrosion Resistance in Numerous Environments
  Tie Rods Mechanical Properties High Strength
  Tie Rods Softening Resistance Resistance to Softening
  Welding Rod Conductivity (Electrical) Electrical Conductivity
  Welding Rod Conductivity (Thermal) Thermal Conductivity
  Welding Rod Welding Characteristics Weld to other Cu Al alloys
  Welding Wire Welding Characteristics Weld Alloy - c61300
Marine Marine Hardware Corrosion Resistance Corrosion Resistance
  Marine Hardware Corrosion Resistance Corrosion Resistance (Excellent)
  Marine Hardware Corrosion Resistance Corrosion Resistance to Salt Water
  Marine Hardware Mechanical Properties Moderate Strength

 

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Contact Us

  • Address:
    Aufhauser Corporation
    39 West Mall, Plainview, NY 11803 USA

  • Phone: +1-212-246-0205

  • Email: sales @ brazing.com