AMS 4598 C72900 Alloy, C729 Copper Nickel-Tin Bronze

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Cast products
- C86300* manganese bronze
- C89835* tin bronze lead-free replacement
- C90300* tin bronze
- C93200* leaded tin bronze
- C95400* aluminum bronze
- C95500* nickel aluminum bronze
- AMS 4880-C95510* nickel aluminum bronze
- C95900* aluminum bronze
- *standard-stocked alloy
Lead-free products
- C69300
- C87850
- C89325 replacement for C93700
- C89831 replacement for C84400
- C89833 replacement for C83600
- C89835* replacement for C93200, C83600, C84400
- C89844 replacement for C84400
- C90300*
- C90800
- C90810
- C95400*
- C95500*
- C95900*
- *standard-stocked alloy
Drawn products
- C14500* tellurium copper
- C23000 red brass
- C24000 low brass
- C26000 cartridge brass
- C31400 leaded commercial bronze
- C31600 leaded commercial bronze
- C46400 naval brass
- C51000* phosphor bronze
- C52100 phosphor bronze
- C54400* phosphor bronze
- C62400 aluminum bronze
- AMS 4640-C63000* nickel-aluminum bronze
- AMS 4590-C63020* nickel-aluminum bronze
- AMS 4634-C64200* aluminum bronze
- C65100 low-silicon bronze
- C67300* manganese bronze
- C67400 manganese bronze
- C67410 manganese bronze
- C69300 lead-free brass
- C69400 silicon red brass
- AMS 4596-C72900* copper nickel-tin bronze
- AMS 4597-C72900* copper nickel-tin bronze
- AMS 4598-C72900* copper nickel-tin bronze
- *standard-stocked alloy
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Close AMS 4598-C72900 Hardiall®

Stocked alloy specs

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C14500
C51000
C54400
AMS 4640-C63000
AMS 4590-C63020
AMS 4634-C64200
C67300
AMS 4596-C72900
AMS 4597-C72900
AMS 4598-C72900
C86300
C89835
C90300
C93200
C95400
C95500
AMS 4880-C95510
C95900
CONCAST380

Reference guide

Stocked size schedules

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C14500
C51000
C54400
AMS 4640-C63000
AMS 4590-C63020
AMS 4634-C64200
C67300
AMS 4596-C72900
AMS 4597-C72900
AMS 4598-C72900
C86300
C89835
C90300
C93200
C95400
C95500
AMS 4880-C95510
C95900
CONCAST380

✔ Standard-stocked product

Extruded and drawn

Wieland Concast is the exclusive North American supplier of Hardiall® (C72900) produced by Lebronze alloys*. Hardiall is an extruded and drawn, spinodal hardened copper nickel-tin (CuNiSn) bronze 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, thus making it a beryllium copper substitute alloy.

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. Because of these same characteristics, C729 is in high demand for the oil and gas industry, and others as well. C729 is also available, standard stocked, in AMS 4596 and AMS 4597 specifications. More»

Wieland Concast is also certified to AS9100 standards and requirements. AS9100 certificate can be viewed here.

*Lebronze alloys

AMS 4598-C72900 spec sheet

AMS 4598-C72900 size schedule

C72900 brochure

Aerospace brochure

Aerospace booklet

Oil and gas brochure

Weight calculator

Standard products AMS 4598-C72900 Hardiall®

Product description: Copper nickel-tin bronze Tempers: TX 00 solution annealed and spinodal hardened Tubes: 4.50" to 8.56" (114.30 mm to 217.42 mm) O.D.* *Consult mill for other shapes/sizes

Typical uses

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

Electrical: Connectors, contacts, controls, miniaturized sockets, relay elements, switches

Industrial: Springs, wire

Marine: Marine components

Oil and Gas: Bearings, bushings, drilling components, sucker rod, valve guide bushing couplings

Chemical composition

Ni + Co%	Sn%	Fe%	Zn%	Mn%	Cb%	Mg%	Pb%	Cu%
Chemical composition according to AMS 4598 Note: Copper + sum of named elements, 99.5% min. Single values represent maximums.
14.50-15.50	7.508.50	0.50	0.50	0.30	0.10	0.15	0.02	Rem.

Machinability

AMS	Machinability rating	Density (lb/in3)	Density (g/cm3)
AMS 4598-C72900		0.323	8.94

Mechanical properties Mechanical properties according to AMS 4598

TX 00 Solution Annealed and Spinodal Hardened

Size range: 1.10" (28 mm) to 7.25" (184 mm) inclusive nominal outside diameter (tube); forward extruded

Ultimate tensile strength, min		Yield strength, at 0.2% Offset, min		Elongation, in 4D, min	Rockwell "C" hardness	Remarks
ksi	MPa	ksi	MPa	%	min HRC
131	903	104	717	8	30

Size range: 7.25" (184 mm) to 13.6" (330 mm) inclusive nominal outside diameter (tube); back extruded

Ultimate tensile strength, min		Yield strength, at 0.2% Offset, min		Elongation, in 4D, min	Rockwell "C" hardness	Remarks
ksi	MPa	ksi	MPa	%	min HRC
130	896	108	745	5	30

Physical properties

	US Customary	Metric
Physical properties provided by CDA
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 20 °C
Modulus of elasticity in tension	18500 ksi	127554 MPa
Modulus of rigidity	7500 ksi	51711 MPa

Fabrication properties

Technique	Suitability
Fabrication properties provided by CDA
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

Treatment	Minimum*	Maximum*
Thermal properties provided by CDA *Temperature is measured in Fahrenheit.
Annealing	1515
Hot treatment	1200	1600

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C14500 C23000 C24000 C26000 C31400 C31600 C46400 C51000 C52100 C53400 C54400 C62400 C63000 C63020 C64200 C64210 C65100 C67300 C67400 C67410 C67600 C69300 C69400 C69430 C72900 (AMS 4596) C72900 (AMS 4597) C72900 (AMS 4598) C83600 C83800 C84200 C84400 C84800 C85700 C86200 C86300 C86400 C86500 C86700 C87850 C89320 C89325 C89520 C89831 C89833 C89835 C89844 C90300 C90500 C90700 C90800 C90810 C91000 C91100 C91300 C91600 C91700 C92200 C92300 C92500 C92700 C92800 C92900 C93200 C93400 C93500 C93600 C93700 C93800 C93900 C94000 C94100 C94300 C94700 C94700HT C94800 C95200 C95300 C95300HT C95400 C95400HT C95410 C95410HT C95500 C95500HT C95510 C95520HT C95600 C95800 C95900 C96400 C96900HT C97300 C97600 C97800 C99500