Manufacturer of Custom Machined Parts

Cast C93700

The lead content in these alloys is between 7 percent and 30 percent. High-leaded tin bronzes are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. The high-leaded tin bronzes are ideal for bearing applications where there could be a loss of the lubrication boundary. These alloys perform excellent in unforgiving environments where foreign matter may be present, such as dirt and other foreign materials. The high-leaded alloys are able to envelope foreign matter due to their malleable nature and, in doing so, protect the wear surface of a mating part such as a shaft.

Information

PRODUCT DESCRIPTION: High-Leaded Tin Bronze
SOLIDS: 1/2" to 10" O.D.
TUBES: 1” to 16” O.D.
RECTANGLES: Up to 20”
STANDARD LENGTHS: 144”
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

BUILDERS HARDWARE: brackets
FASTENERS: nuts, washers for engines
INDUSTRIAL: applications requiring acid resistance to sulphite fluids, bearing plates, bearings, bushings, bushings for high speed and heavy pressure, corrosion-resistant castings, crank shafts, high speed/heavy load bearings, impellers, machine parts, parts for steel mill maintenance, pressure-tight castings, pumps, slide guides for steel mills
MARINE: large bearings for ships

Similar or Equivalent Specification

CDAASTMSAEAMSFederalMilitaryOther
C93700B505 B505M65 J461 J462QQ-C-390, E10MIL-B-11553, Comp 23Bearing Bronze; 80-10-10 Bronze

Chemical Composition

Cu%Pb%Sn%Zn%Fe%1P%Ni%2Al%S%Sb%Si%
78.00-82.008.00-11.009.00-11.000.800.701.500.500.0050.080.500.005

Chemical Composition according to ASTM B505/B505M-18

¹Fe shall be 0.35% max., when used for steel-backed bearings. ²Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums.

Machinability

Copper Alloy UNS No.Machinability RatingDensity (lb / in³ at 68°F)
C93700800.32

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
3524120138660

Physical Properties

 US CustomaryMetric
Melting Point - Liquidus1705 °F 929 °C
Melting Point - Solidus1403 °F 762 °C
Density0.32 lb/in³ at 68 °F 8.86 gm/cm³ at 20 °C
Specific Gravity8.868.86
Electrical Conductivity10% IACS at 68 °F 0.059 MegaSiemens/cm at 20 °C
Thermal Conductivity27.1 Btu/sq ft/ft hr/°F at 68 °F 46.9 W/m at 20 °C
Coefficient of Thermal Expansion 68-57210.3 · 10-6 per °F (68-212 °F)17.8 · 10-6 per °C (20-100 °C)
Specific Heat Capacity0.09 Btu/lb/°F at 68 °F377.1 J/kg at 20 °C
Modulus of Elastic in Tension11000 ksi75800 MPa
Incipient Melting600°F316°C
Magnetic Permeability11

Fabrication Properties

TechniqueSuitability
SolderingExcellent
Brazing*Good
Oxyacetylene WeldingFair
Gas Shielded Arc WeldingFair
Coated Metal Arc WeldingFair
Machinability Rating20

Fabrication Properties provided by CDA

*Since brazing is performed withing the hot-short range, strain must be avoided during brazing and cooling.

Thermal Properties

TreatmentValue*Time**
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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