Manufacturer of custom machined parts

Cast C93200

The lead content in high leaded tin bronze alloys is between 7.00% and 15.00%. These alloys are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. Alloy C93200, also termed C932, bearing bronze, SAE 660, SAE 660 bronze, and SAE 660 bearing bronze, is considered this family’s workhorse alloy and is widely used in many bearing applications.


Product description: Leaded Tin bronze
Solids: 1/2" to 13" O.D.
Tubes: 1” to 16” O.D.
Rectangles: Up to 20”
Standard lengths: 105”
Shape/Form: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar

Typical uses

AUTOMOTIVE: automotive fittings
Fasteners: washers
Industrial: bushings, bearings, bearings for cranes, diesel engine wrist pin bushings, forging press toggle lever bearings, insert bearings, fittings, fuel pump bushings, general purpose bushings, hydraulic press main lining, hydraulic press stuffing box, linkage bushings for presses, machine parts, machine tool bearings, main spindle bearings, pump fixtures, pump impellers, pumps, roll neck bearings, rolling mill bearings, thrust washers, trunion bearings, water pump bushings

Similar or equivalent specification

C93200 B505 B505MJ461 J462QQ-C-390, E7; QQ-B-1005, Comp 12QQ-C-390, E7; QQ-B-1005, Comp 12Bearing Bronze

Chemical composition


Chemical composition according to ASTM B505/B505M-23

¹In determining Cu min., Cu may be calculated as Cu + Ni. ²Ni value includes Co.
Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.


Copper alloy UNS no.Machinability ratingDensity (lb / in³ at 68°F)

Mechanical properties

Tensile strength, minYield strength, at 0.5% extension under load, minElongation, in 2 in. or 50 mm minBrinell hardness (500 kg load)Remarks
ksiMPaksiMPa%typical BHN

Mechanical properties according to ASTM B505/B505M-23

Physical properties

US CustomaryMetric
Melting point - liquidus1790 °F 977 °C
Melting point - solidus1570 °F 854 °C
Density0.322 lb/in³ at 68 °F 8.91 gm/cm³ at 20 °C
Specific gravity8.918.91
Electrical conductivity12% IACS at 68 °F 0.07 MegaSiemens/cm at 20 °C
Thermal conductivity33.6 Btu/sq ft/ft hr/°F at 68 °F 58.2 W/m at 20 °C
Coefficient of thermal expansion 68-57210 · 10-6 per °F (68-572 °F)17.3 · 10-6 per °C (20-300 °C)
Specific heat capacity0.09 Btu/lb/°F at 68 °F377.1 J/kg at 20 °C
Modulus of elastic in tension14500 ksi100000 MPa

Fabrication properties

Oxyacetylene weldingNot recommended
Gas shielded arc weldingNot recommended
Coated metal arc weldingNot recommended
Machinability rating70

Thermal properties

Stress relief500
Solution treatment0

Thermal properties provided by CDA

*Temperature is measured in Fahrenheit. **For stress relief, solution treatment and annealing - time is measured in hours/inch of thickness. For precipitation heat treatment - time is measured in hours.

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