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.
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
| CDA | ASTM | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|
| C65100 | B98 B98M |
Chemical composition
| Cu%1 | Pb% | Zn% | Fe% | Mn% | Si% | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
1Cu value includes Ag. Note: Cu + sum of named elements, 99.5% min. Single values represent maximums. | |||||||||||
| Rem. | 0.05 | 1.50 | 0.80 | 0.70 | 0.80- 2.00 | ||||||
Machinability
| Copper alloy UNS No. | Machinability rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C65100 | 30 | 0.316 |
Mechanical properties
C65100
H02 half hard
Size range: up to 1/2″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 55 | 380 | 20 | 140 | 11 | 60-85 | |
Size range: over 1/2″ to 2″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 55 | 380 | 20 | 140 | 12 | 60-85 | |
C65100
H04 hard
Size range: up to 1/2″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 65 | 450 | 35 | 241 | 8 | 65-90 | |
Size range: over 1/2″ to 2″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 65 | 450 | 35 | 241 | 10 | 65-90 | |
C65100
H06 extra hard
Size range: up to 1/2″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 85 | 585 | 55 | 380 | 6 | 75-95 | |
Size range: over 1/2″ to 1″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 75 | 515 | 45 | 310 | 8 | 75-95 | |
Size range: over 1″ to 1 1/2″ rod inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load,, min | Elongation, in 2 in. or 50 mm min | Rockwell “B” hardness | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | min to max HRB | |
| 75 | 515 | 40 | 275 | 8 | 75-95 | |
Physical properties
Physical properties provided by CDA | |||||||||||
| US Customary | Metric | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Melting point – liquidus | 1940 °F | 1060 °C | |||||||||
| Melting point – solidus | 1890 °F | 1032 °C | |||||||||
| Density | 0.316 lb/in3 at 68 °F | 8.75 gm/cm3 at 20 °C | |||||||||
| Specific gravity | 8.75 | 8.75 | |||||||||
| Electrical conductivity | 12% IACS at 68 °F | 0.07 MegaSiemens/cm at 20 °C | |||||||||
| Thermal conductivity | 33 Btu/sq ft/ft hr/°F at 68 °F | 57.1 W/m at 20 °C | |||||||||
| Coefficient of thermal expansion 68-572 | 9.9 · 10-6 per °F (68-572 °F) | 17.1 · 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 | 17000 ksi | 117212 MPa | |||||||||
| Modulus of rigidity | 6400 ksi | 44127 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 | Fair | ||||||||||
| Spot weld | Excellent | ||||||||||
| Seam weld | Good | ||||||||||
| Butt weld | Excellent | ||||||||||
| Capacity for being cold worked | Excellent | ||||||||||
| Capacity for being hot formed | Excellent | ||||||||||
| Machinability rating | 30 | ||||||||||
Thermal properties
Thermal properties provided by CDA *Temperature is measured in Fahrenheit. |
