Silicon Bronze 651 Material Property Data Sheet

Do you need custom fasteners created with Silicon Bronze 651? Since our inception, Elgin Fastener Group has met every challenge of providing Quality, Timely, Cost-effective solutions for specialty fastener applications. Every product is built to your specifications, using your prints if necessary.

Below are the technical specifications of the Silicon Bronze 651 Bar Stock we have available to meet your needs.

Low-silicon bronze B, UNS C65100, OSO35 Temper rod

Subcategory: Bronze; Copper Alloy; Metal; Nonferrous Metal

Key Words: CDA 651, ISO CuSi1, CEN C115C

Component Wt. %
Cu 98.5
Fe Max 0.8
Mn Max 0.7
Pb Max 0.05
Si 0.8 – 2
Zn Max 1.5

Material Notes:
Good to excellent corrosion resistance. Excellent hot and cold workability. Fabricated by forming and bending, heading and upsetting, hot forging and pressing, roll threading and knurling, squeezing and swaging.

Applications: hydraulic pressure lines, anchor screws, bolts, cable clamps, cap screws, machine screws, marine hardware, nuts, pole-line hardware, rivets, U-bolts, electrical conduits, heat exchanger tubing, welding rod.

Test specimen: rod – 25mm diameter.

Physical Properties Metric English Comments
Density 8.75 g/cc 0.316 lb/in³ at 20°C (68°F)
Mechanical Properties
Hardness, Rockwell F 55 55
Tensile Strength, Ultimate 275 MPa 39900 psi
Tensile Strength, Yield 105 MPa 15200 psi 0.5% extension under load
Elongation at Break 50 % 50 % In 50 mm
Modulus of Elasticity 115 GPa 16700 ksi
Machinability 30 % 30 % UNS C36000 (free-cutting brass) = 100%
Shear Modulus 44 GPa 6380 ksi
Electrical Properties
Electrical Resistivity 1.44e-005 ohm-cm 1.44e-005 ohm-cm
Thermal Properties
CTE, linear 250°C 18 µm/m-°C 10 µin/in-°F from 20-300°C (68-570°F)
Heat Capacity 0.38 J/g-°C 0.0908 BTU/lb-°F
Thermal Conductivity 57 W/m-K 396 BTU-in/hr-ft²-°F at 20°C (68°F)
Melting Point 1030 – 1060 °C 1890 – 1940 °F
Solidus 1030 °C 1890 °F
Liquidus 1060 °C 1940 °F
Processing Properties
Annealing Temperature 475 – 675 °C 887 – 1250 °F
Hot-Working Temperature 700 – 875 °C 1290 – 1610 °F

References are available for this material.

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