Lead-Free Bismuth Copper Bars (UNS C49300) – Mechanical Properties

Nov 22 2012

UNS C49300 lead-free bismuth copper alloy has a copper content of not less than 58%.

The following table shows the mechanical properties of UNS C49300 bars as a function of heat treatment and thickness.

Temper Thickness Tensile Str. Elong. Shear Str. Fatigue Str.
H02 25.4 mm (1 in) 462 MPa (67 ksi) 9% - -
H04 5.1 mm (0.02 in) 517 MPa (75 ksi) 5% 290 MPa (42 ksi) 200 MPa (29 ksi)
M30 25.4 mm (1 in) 427 MPa (62 ksi) 20% - -
O61 25.4 mm (1 in) 441 MPa (64 ksi) 18% - -

The chemical composition of UNS C49300 copper alloy is outlined in the following table.

Element Content (%)
Copper, Cu 58-62
Nickel, Ni 1.5
Tin, Sn 1-1.8
Bismuth, Bi 0.50-2
Antimony, Sb 0.5
Aluminum, Al 0.5
Silicon, Si 0.1
Iron, Fe 0.1
Manganese, Mn 0.03
Selenium, Se 0.02
Phosphorous, P 0.02
Lead, Pb 0.01
Zinc, Zn Balance

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