UNS C65100 (CW115C) Silicon Bronze

C65100 bronze is a bronze formulated for primary forming into wrought products. CW115C is the EN numeric designation for this material. C65100 is the UNS number. Additionally, the EN chemical designation is CuSi1. And the common industry name is Low-Silicon Bronze B.

It has the lowest embodied energy and can have a moderately low tensile strength among wrought bronzes.

The properties of C65100 bronze include nine common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C65100 bronze to: wrought bronzes (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it’s 50% of the highest, and so on.

Category:
Product description: C65100 Low-silicon bronze
Tempers: H02 half hard, H04 hard, H06 extra hard
Solids: 3/8″ to 2″ O.D.
Hex: 3/8″ to 2″ O.D.
Standard lengths: 144″

Typical uses

Electrical: conduit, motor (rotor bars), pole line hardware
Fasteners: bolts, cable clamps, cap screws, fasteners, machine screws, nuts, rivets, screws, u bolts
Industrial: heat exchanger tube, hydraulic pressure lines, oil refinery plumbing tube, welding rod
Marine: hardware

Similar or equivalent specification

CDAASTMSAEAMSFederalMilitaryOther
C65100B98
B98M

Chemical composition

Cu%1Pb%Zn%Fe%Mn%Si%

Chemical composition according to ASTM B98/B98M-13(2019)

1Cu value includes Ag.
Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.
Rem.0.051.500.800.700.80-
2.00

Machinability

Copper alloy UNS No.Machinability ratingDensity (lb/in3 at 68 °F)
C65100300.316

Mechanical properties

Mechanical properties according to ASTM B98/B98M-13(2019)

C65100

H02 half hard

Size range: up to 1/2″ rod inclusive
Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
55380201401160-85
Size range: over 1/2″ to 2″ rod inclusive
Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
55380201401260-85

C65100

H04 hard

Size range: up to 1/2″ rod inclusive

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
6545035241865-90

Size range: over 1/2″ to 2″ rod inclusive

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
65450352411065-90

C65100

H06 extra hard

Size range: up to 1/2″ rod inclusive

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
8558555380675-95

Size range: over 1/2″ to 1″ rod inclusive

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
7551545310875-95

Size range: over 1″ to 1 1/2″ rod inclusive

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minRockwell “B” hardnessRemarks
ksiMPaksiMPa%min to max HRB
7551540275875-95

Physical properties

Physical properties provided by CDA
US CustomaryMetric
Melting point – liquidus1940 °F1060 °C
Melting point – solidus1890 °F1032 °C
Density0.316 lb/in3 at 68 °F8.75 gm/cm3 at 20 °C
Specific gravity8.758.75
Electrical conductivity12% IACS at 68 °F0.07 MegaSiemens/cm at 20 °C
Thermal conductivity33 Btu/sq ft/ft hr/°F at 68 °F57.1 W/m at 20 °C
Coefficient of thermal expansion 68-5729.9 · 10-6 per °F (68-572 °F)17.1 · 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 elasticity in tension17000 ksi117212 MPa
Modulus of rigidity6400 ksi44127 MPa

Fabrication properties

Fabrication properties provided by CDA
TechniqueSuitability
SolderingExcellent
BrazingExcellent
Oxyacetylene weldingGood
Gas shielded arc weldingExcellent
Coated metal arc weldingFair
Spot weldExcellent
Seam weldGood
Butt weldExcellent
Capacity for being cold workedExcellent
Capacity for being hot formedExcellent
Machinability rating30

Thermal properties

Thermal properties provided by CDA
*Temperature is measured in Fahrenheit.