Brass Material Property Data Sheet

Do you need custom fasteners created with Brass? 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 Brass Bar Stock we have available to meet your needs.

Medium-leaded brass, UNS C34000, OSO25 Temper rod

Subcategory: Brass; Copper Alloy; Metal; Nonferrous Metal

Key Words: 340 brass, CZ118, ISO CuZn35Pb1, CEN CW600N

Component Wt. %
Cu 62.5 – 66.5
Fe Max 0.1
Other Max 0.5
Pb 0.8 – 1.4
Zn 34

Material Notes:
Please Note: Zinc content is calculated as a remainder. Fair to excellent corrosion resistance. Fabricated by blanking, heading and upsetting, machining, piercing and punching, roll threading and knurling, stamping.

Applications: couplings, free machining screws and rivets, gears, nuts, or tire valve stems.

Test specimen: rod – 25mm diameter.

Physical Properties Metric English Comments
Density 8.47 g/cc 0.306 lb/in³ at 20°C (68°F)
Mechanical Properties
Hardness, Rockwell F 70 70
Tensile Strength, Ultimate 345 MPa 50000 psi
Tensile Strength, Yield 135 MPa 19600 psi 0.5% extension under load
Elongation at Break 60 % 60 % In 50 mm
Modulus of Elasticity 105 GPa 15200 ksi
Poisson’s Ratio 0.346 0.346
Machinability 60 % 60 % UNS C36000 (free-cutting brass) = 100%
Shear Modulus 39 GPa 5660 ksi
Shear Strength 235 MPa 34100 psi
Electrical Properties
Electrical Resistivity 6.6e-006 ohm-cm 6.6e-006 ohm-cm
Thermal Properties
CTE, linear 250°C 20.3 µm/m-°C 11.3 µin/in-°F from 20-300°C (68-570°F)
Heat Capacity 0.38 J/g-°C 0.0908 BTU/lb-°F
Thermal Conductivity 115 W/m-K 798 BTU-in/hr-ft²-°F at 20°C (68°F)
Melting Point 885 – 925 °C 1630 – 1700 °F
Solidus 885 °C 1630 °F
Liquidus 925 °C 1700 °F
Processing Properties
Annealing Temperature 425 – 650 °C 797 – 1200 °F
Recrystallization Temperature 288 °C 550 °F

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