AMS 4597-C72900

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Wrought

Concast is the exclusive distributor of Hardiall® (C72900) produced by LeBronze Alloys. Hardiall is a wrought, spinodal hardened copper alloy designed for high strength applications where toughness is required. It resists mechanical wear, galling, stress relaxation, corrosion and erosion. It is non-magnetic and easy to machine into complex components. In addition, it is environmentally friendly, being lead and beryllium free.


Hardiall is used in aircrafts in various components thanks to its outstanding physical and mechanical properties, matching the stringent needs of the aircraft and aerospace industries. C729 is also available in AMS 4596 and AMS 4598 standards.

Info

Product Description: Copper Nickel-Tin Bronze
Tempers: TX TS Solution Annealed, Cold Finished and Spinodal Hardened
Solids: .75" to 3.14" (19.05 mm to 79.76 mm) O.D.*

 *Consult Mill for Other Sizes

Typical Uses

Aerospace: landing gear bushings and bearings, control surface and actuator bushings and bearings, wing flap bearings, wheel bearings, brakes, door hardware, hydraulic actuators, valves, steering joints, helicopter controls, compression fit airframe fasteners, electronic system connectors

Chemical Composition

Ni + Co% Sn% Fe% Zn% Mn% Cb% Mg% Pb% Cu%
Chemical Composition according to AMS 4597

Note: Copper + Sum of Named Elements, 99.5% min. Single values represent maximums.
14.50-
15.50
7.50
8.50
 
0.50
 
0.50
 
0.30
 
0.10
 
0.15
 
0.02
 
Rem.

Machinability

AMS Machinability Rating Density (lb/in3) Density (g/cm3)
AMS 4597-C72900   0.323 8.95

Mechanical Properties

Mechanical Properties according to AMS 4597

Composition similar to UNS C72900

TX TS Solution Annealed, Cold Finished and Spinodal Hardened

SIZE RANGE: UP TO 1.60" (40 MM) EXCLUSIVE NOMINAL THICKNESS BETWEEN PARALLEL SIDES (BARS, RODS); NOMINAL WALL THICKNESS (TUBING)
Ultimate Tensile Strength, min Yield Strength, at .2% Offset, min Elongation, in 4D, min Rockwell "C" Hardness Remarks
ksi MPa ksi MPa % min HRC
165 1137 155 1069 6 34
SIZE RANGE: 1.60" TO 3.25" (40 TO 83 MM) INCLUSIVE NOMINAL THICKNESS BETWEEN PARALLEL SIDES (BARS, RODS); NOMINAL WALL THICKNESS (TUBING)
Ultimate Tensile Strength, min Yield Strength, at .2% Offset, min Elongation, in 4D, min Rockwell "C" Hardness Remarks
ksi MPa ksi MPa % min HRC
156 1075 148 1020 3 34

Physical Properties

Physical Properties provided by CDA

  US Customary Metric
Melting Point - Liquidus 2039 °F 1115 °C
Melting Point - Solidus 1742 °F 950 °C
Density 0.323 lb/in3 at 68 °F 8.94 gm/cm3 at 20 °C
Specific Gravity 8.94 8.94
Electrical Conductivity 7.8% IACS at 68 °F 0.045 MegaSiemens/cm at 20 °C
Thermal Conductivity 17 Btu/sq ft/ft hr/°F at 68 °F 29.4 W/m at 20 °C
Coefficient of Thermal Expansion 68-572 9.1 ·10-6 per °F (68-572 °F) 15.8 ·10-6 per °C (20-300 °C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 293 °C
Modulus of Elasticity in Tension 18500 ksi 127554 MPa
Modulus of Rigidity 7500 ksi 51711 MPa

Fabrication Properties

Fabrication Properties provided by CDA
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Gas Shielded Arc Welding Excellent
Coated Metal Arc Welding Excellent
Spot Weld Excellent
Seam Weld Excellent
Butt Weld Excellent
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Good

Thermal Properties

Thermal Properties provided by CDA

*Temperature is measured in Fahrenheit.
Treatment Minimum* Maximum*
Annealing 1515  
Hot Treatment 1200 1600

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